Dcs functional block diagrams

DCS

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SPECIFICATION
DCS FUNCTIONAL BLOCK DIAGRAMS
6
530/11/2000JP. LEROY JP. LEROY Ph. ROBIN Updated according to FAT
419/05/2000D. PUDAR JP. LEROY F. GLAISNER Issue For Construction
330/12/1999D. PUDAR JP. LEROY F. REGARD Issue For Construction
229/09/1999D. PUDAR JP. LEROY F. REGARD Issue For Construction
110/05/1999D. PUDAR / JPLEROY JP. LEROY F. REGARD Issue For Design for Foxboro Kick Off Meeting
003/03/1999D. PUDAR / JPLEROY JP. LEROY F. REGARD For approval
Rev Date
DD/MM/YY
WRITTEN BY
(name & visa)
CHECKED BY
(name & visa)
APPROVED BY
(name & visa)
STATUS
DOCUMENT REVISIONS
Sections changed in last revision are identified by a vertical line in the left margin
Modifications subject of this revision concern the following pages: 2, 8, 9, 12, 13, 15, 18, 23, 25, 30 to
32, 53, 58, 64 to 66, 69, 83 to 85, 89
Refer to page 2 for description of revision

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Description of modifications Rev 5:
Completed and updated in accordance with FAT configuration, mainly:
§ List of functional blocks added (paragraph 10)
§ Typical C09: time delay added to flip-flop for the reset of local stop or auto transfer signal
§ Typical C09A: auto transfer logic is clarified.
§ Typical C33: Hand control with switch instead of split range
§ Typical I04: Compterm formula are clarified
§ Typical I04...: Flow correction indication is tagged FY (FI remain the flow indication before
compensation
§ Typical M05, M05A, M08: Stop signal to EMCS is added, forced permanently to 1 to allow the
hardwired start commands

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CONTENTS
1.OBJECTIVES......................................................................................................................8
2.REFERENCES AND RE LATED DOCUMENTS .................................................................8
3.FUNCTIONAL BLOCK DIAGRAM IDENTIFICATION ........................................................8
3.1 Loop Identification...............................................................................................................................................8
3.2 Differentiation between Generic and Complex Loops..........................................................................................8
4.ABBREVIATIONS...............................................................................................................8
5.CONTROL LOOPS - GENERAL RULES ...........................................................................9
6.PROCESSOR STARTUP AND INPUT /OUTPUT DEFAULT MANAGEMENT ................10
6.1 Processor Start-up..............................................................................................................................................10
6.2 Default on input..................................................................................................................................................10
6.3 Default on output module...................................................................................................................................10
7.CONTROLLER PARAME TERS.......................................................................................11
7.1 Controller action.................................................................................................................................................11
7.2 Controller tunning default values.......................................................................................................................11
8.ALARM SETTING.............................................................................................................11
9.INPUT/OUTPUT SPECIFICATIONS.................................................................................11
10.LIST OF FUNCTIONAL BLOCKS....................................................................................12
11.DCS FUNCTIONAL BLOCKS FOR CONTROL ...............................................................14
11.1Typical C01 – Single control...............................................................................................................................14
11.2Typical C02 – Cascade control...........................................................................................................................15
11.3Typical C03 – Split range control.......................................................................................................................17
11.4 Typical C04- Controller with solenoid on control valve.....................................................................................19

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11.5Typical C04B – Controller with output forced by heater logic..........................................................................21
11.6Typical C04C - Controller with solenoid on control valve and limit switch to DCS..........................................22
11.7Typical C05 – On-Off control with level indication (output to solenoid valve) gap controller..........................23
11.8Typical C05A – On-Off control without level indicator (output to solenoid valve)...........................................24
11.9Typical C05B – On-Off control with level indication (output to solenoid valve................................................25
11.10Typical C06 – Controller with low / high scale selection....................................................................................26
11.11Typical C07 – Controller with smooth switching facility between two control valves.......................................27
11.12Typical C08 –Level control by start/stop pump command................................................................................28
11.13Typical C08A – Level control by stop pump command.....................................................................................29
11.14Typical C09 – Automatic start of stand-by pump..............................................................................................30
11.15Typical C09A – Auto-transfer............................................................................................................................32
11.16Typical C10 – Start and stop of pumps by LSHL with operator selection of pump to be started.....................33
11.17Typical C10A – Start and stop of pumps by LSHL with operator selection of pump to be started and level
controller...................................................................................................................................35
11.18Typical C10B - Start and stop of pumps by LSHL with operator selection of pump to be started and automatic
start of stand-by pump if main one not start after a time delay...............................................37
11.19Typical C11 – Single control with input signal from ESD system......................................................................39
11.20Typical C11A – Single control with input signal from ESD system and output forced by heater logic............40
11.21Typical C12 – Cascade control with input signal from ESD system..................................................................42
11.22Typical C13 – Split range control, with input signal from ESD system.............................................................43
11.23Typical C14 – Controller with solenoid on control valve, with input signal from ESD system.........................44
11.24Typical C15 – On-Off control (output to solenoid valve) with input signal from ESD system..........................46
11.25Typical C17 – Controller with smooth switching facility between two control valves, with input signal from
ESD system................................................................................................................................47
11.26Typical C18 – Level control by start/stop pump command, with input signal from ESD system.....................48
11.27Typical C21 – Controllers with output signal selector.......................................................................................49
11.28Typical C23 – Cascade control with split range.................................................................................................50
11.29Typical C27 – Cascade control with smooth switching facility between two valves..........................................51
11.30Typical C31 – Hand controller...........................................................................................................................52

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11.31Typical C32 – Temperature control on air cooler exchanger............................................................................52
11.32Typical C33 – Hand control with two valves......................................................................................................53
11.33Typical C34 – Hand controler to cooler louver..................................................................................................53
11.34Typical C35 – Hand controller with solenoid on control valve..........................................................................54
11.35Typical C36 – Hand controller to two variable frequency drivers....................................................................55
11.36Typical C37 – Cascade control with smooth switching facility between two valves, with input signal from ESD
system........................................................................................................................................56
12.DCS FUNCTIONAL BLOCKS FOR INDICATION ............................................................57
12.1Typical I01 – Single indicator.............................................................................................................................57
12.2 Typical I03 – Differential input indicator...........................................................................................................57
12.3 Typical I04 – Flow correction.............................................................................................................................58
12.4Typical I04C – Flow correction with two flow transmitters and temperature compensation only...................60
12.5Typical I04D – Flow correction with three flow transmitters............................................................................61
12.6Typical I04E – Flow correction with two flow transmitters...............................................................................62
12.7Typical I05 – Temperature indicator via local remote cabinet (same as I01)....................................................62
12.8Typical I06 - Indicator with low / high scale selection........................................................................................63
12.9 Typical I06A - Indicator with low / high scale selection and 3 flow transmitters..............................................63
12.10Typical I07 – Local flow indication.....................................................................................................................64
12.11Typical I08 – To summarize two flow measurements........................................................................................64
12.12Typical I09 – Average temperature calculation used in heater logic.................................................................65
12.13Typical I10 – Indicator with high alarm on input deviation..............................................................................66
12.14Typical I11 - Single indicator with input signal from ESD system....................................................................66
12.15Typical I13 – Multiple differential pressure input indicator..............................................................................67
12.16Typical I23 – Differential input alarm from ESD system...................................................................................67
13.DCS FUNCTIONAL BLOCKS FOR LOGIC AND/OR ALARM .........................................68
13.1Typical L01 - Alarm............................................................................................................................................68
13.2Typical L01A – Alarm and input to logic from transmitter..............................................................................68
13.3Typical L02 – Digital alarm................................................................................................................................69

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13.4Typical L02A – Digital alarm and Input to logic...............................................................................................69
13.5Typical L03 – Digital output to alarm on LP.....................................................................................................69
13.6Typical L03A – Digital output to pilot light on local panel................................................................................70
13.7Typical L03B – Two digital outputs to two pilot lights on local panel...............................................................70
13.8Typical L04 – Digital output to solenoid.............................................................................................................71
13.9Typical L05 – Level or temperature command..................................................................................................71
13.10Typical L06 – Alarm...........................................................................................................................................71
13.11Typical L10 – Alarms from ESD to SMP...........................................................................................................72
13.12Typical L11A – Alarm from ESD or subsystem to DCS....................................................................................72
13.13Typical L15 – DCS command to filter logic.......................................................................................................72
13.14 Typical L37 – On/off valve command from DCS...............................................................................................73
13.15Typical L37A – On/off valve command from DCS (Veneagua logic)................................................................73
13.16Typical L37B – On/off valve activated by the DCS by an Interlock or soft push button from CCR................74
13.17Typical L38 – On/off valve command from DCS without limit switches...........................................................75
13.18Typical L39 – Motorized valve with commands from DCS without remote stop..............................................75
13.19Typical L39A – Motorized valve with commands from DCS with remote stop.................................................76
14.DCS FUNCTIONAL BLOCK FOR MOTOR ......................................................................77
14.1Typical M01 – Motor DCS stop command and status........................................................................................77
14.2 Typical M01A – Motor DCS start/stop command and status............................................................................79
14.3Typical M03 – Motor DCS stop command and stop command from ESD........................................................81
14.4Typical M03A – Motor DCS start/stop command and stop command from ESD.............................................81
14.5Typical M04 – Compressor NUOVO PIGNONE...............................................................................................82
14.6Typical M05 – Motor start/stop command from ESD (NUOVO PIGNONE logic) (HYL/HYH) and motor fault
hardwired to ESD......................................................................................................................83
14.7Typical M05A –Motor start/stop command from ESD (NUOVO PIGNONE logic) (HYL/HYH)....................84
14.8Typical M05B –Motor start/stop command from ESD (HYL/HYH) and Motor Status hardwired to
Compressor Logic, with serial signals from EMCS..................................................................85
14.9Typical M06 – Motor DCS stop command and stop command from ESD, with pump status to ESD..............86

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14.10Typical M07 – Motor ESD start/stop command.................................................................................................87
14.11Typical M07A – Motor ESD start/stop command..............................................................................................88
14.12Typical M08 – Motor status................................................................................................................................89
14.13Typical M09 – Motor DCS start/stop command, stop command from ESD and automatic start of stand by
pump..........................................................................................................................................90
14.14Typical M10 – Motor DCS start/stop command, stop command from ESD and start/stop of pumps by LSHL
and operator selection of pump to be started...........................................................................91

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1. OBJECTIVES
This specification covers the functional description of typical loops. These will be used to configure
the DCS controllers together with typical loops for Control Systems and Job Spec 4478-60A17.
2. REFERENCES AND RELATED DOCUMENTS
Refer also to:
§ Job Spec 4478-60A17 – General DCS specification
§ SP 5730D 00 1510 02 - Typical loops for Control System
§ SP 5730D 00 1510 03 – Guideline for Control System data base
For all parts linked to ESD system refer to
§ SP 5730D 00 1510 05 - ESD Functional Block Diagrams
3. FUNCTIONAL BLOCK DIAGRAM IDENTIFICATION
3.1 Loop Identification
The loop identification is provided in the field “Typical” of the Control System Database. It is
composed of a letter (“C” for control, “E” for ESD, “I” for Indicator and “L” for Boolean entry) and:
§ either two digit number for “generic loops”
§ or three digit number for “special loops”, as follows :
§ 1xx when issued from POC
§ 2xx when issued from COC
3.2 Differentiation between Generic and Complex Loops
Generic loops are the standard loops used several times in the project.
Complex loops are the non-standard loops. Some standard loops (or generic) such as loops
involving calculations may require complex loop narratives.
Non-standard loops can be an assembly of several generic loops; in that case these generic loops
are identified on the dedicated functional block diagram.
Note: The fact that it exists a typical for a loop does not necessarily make it generic.
4. ABBREVIATIONS
A : Automatic F : False FP : Fail Position M : Manual mode
Mt : Measurement N : No NA : Not Applicable PV : Process Value
RSP : Remote Set Point S : Slave SP : Set Point TR : Tracking
U : Unchanged Y : Yes L : Local mode

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5. CONTROL LOOPS - GENERAL RULES
The principle for operation of control loops is given here after. It applies basically to PID controller
type as well as to more sophisticated controllers and complex loops, unless otherwise specified.
The general rules are as follows:
§ Bump-less looping is required from one mode to another (Cascade, Auto or Manual) with
resetting of derivative and integrative actions. This bump-less looping is also required as far
as possible when manual loading station HC are configured at the controller output (HC
transfer from Auto to Manual and Manual to Auto). Refer to Complex loops on Control
Narratives.
§ Controller proportional action shall be made insensitive to set point changes.
§ In manual mode, the operator without modification of the set point can drive the output value
of a controller. In general when the controller is switched to Manual mode from another
mode, the value of the set point is kept; it is not forced to track the value of process
measurement during the operation in Manual mode. There is some exceptions such as for
slave controller (refer to typical).
When a controller is switched from Auto to Manual or Manual to Auto, the valve position
does not change.
For all accessible controllers, the operator can take the control in Manual. This is particularly
important for controllers at low level (slave controller) so that direct hand control of valve
opening or closing is possible (or couple of valves in case of split range).
§ All accessible controllers shall work on explicit values i.e. values in engineering units that are
meaningful for the operators. This includes measured and calculated values.
If this can not be achieved, intermediate variable may have to be created with corresponding
special display and/or overlay.
Access to basic controller or capability for hand control of actuator by operator has to be
considered.
§ In case of two PID controllers acting on the same output through an automatic selector (e.g.
high selector taking the higher of the two controllers outputs to the valve), the controller shall
be provided with anti reset wind-up feature and the integral actions of each loop shall be
calculated on the actual output of the valve.
§ For complex or advanced schemes, selector and/or dedicated views shall be implemented
so that operator can manage the different modes (Cascade, Auto or Manual) with proper
resetting.
§ For 2 out of 3 voting with safety and control functions embedded on the same 3 sensors
signals, selection of the medium measurement value (selection 1 out of 3 excluding the
maximum and the minimum values) is done as input signal to the controller.
§ To insure control linearity, ratios must not be used as controlled variables but rather as
intermediate calculations. Ratios should be used and result in adequate engineering units.
Important: The AND / OR are functional, they don’t take into account the type of input contact
(open or closed). Consequently in the logic to be implemented an AND functional may be
translated to OR logic by system supplier.

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6. PROCESSOR STARTUP AND INPUT /OUTPUT DEFAULT MANAGEMENT
6.1 Processor Start-up
When a processor is powered-up or reset, it is necessary to put all processed control loops in a
pre-defined state. The following table defines that the loop mode is set to manual, the set point
stored into a configuration file is unchanged and the output is set to the defined fail position (either
close or open).
Set PointControl OutputMode Process value Comments
Initial state U * FP * M * Mt * * See note
below
Note: Refer to § 4 for description of abbreviations
For cascade loops, master controller will initialize in Manual. The master controller obtains its
initialization input from the slave controller.
Each time a module is initialized, appropriate control outputs and states must be frozen until the
end of the initialization cycle has taken place.
6.2 Default on input
In case of bad value of measurement (invalid measurement) of any type, or sensor signal out of
range for measurement other than flow and level, the controller automatically switches into Manual
mode with output kept at the current value. For out of range on flow and level measurement, the
relating controller is kept in the current mode (Cascade, Auto or Manual) but the integral action of
the controller is paused until the out of range disappears, or the measure is good again, whichever
the case.
The operator can then change the output to the valve but cannot switch the loop back to automatic
until the input is declared as healthy again. The force on the mode is then released and the
operator has full control again.
All cases involving an automatic mode change will generate priority 3 alarms.
Set PointControl OutputMode Process value Comments
Default on inputU U M F Except from out of
range for flow and
level service
Out of range U U * U F For flow and level
services only
* Integral action of controller is reset when the out of range disappears, i.e. that measurement is
becoming good again.
6.3 Default on output module
The failure of an output module shall result in the outputs associated with that module freezing their
last good value and simultaneously:
¨ Controller is switches into Manual mode
¨ An Alarm priority 3 is generated

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7. CONTROLLER PARAMETERS
7.1 Controller action
Refer to Control System database field “INCOPT”.
Direct action means that the controller output increases when measurement increases.
Reverse action means that the controller output decreases when the measurement increases.
7.2 Controller tunning default values
PID default values will be used as per Job Spec 4478-60A17 § IV A1
Type of loop Proportional band
in %
Integral time constant
in mn
Derivative time constant
in mn
Flow 500 0,2 0
Level 100 10 0
Pressure 30 0,5 0
Temperature 100 0,2 0,5
Other 100 1 0
8. ALARM SETTING
Refer to database.
When alarms are not required, the unused alarms will be configured out of the operating range.
9. INPUT/OUTPUT SPECIFICATIONS
According to database Control System field “PWR_SRC” I/O can be system powered “S” or
externally powered “E”. In general:
¨ analog inputs, except temperature indicators without transmitters, are powered by the DCS
(24VDC) and 4-20 mA,
¨ analog outputs are powered by the DCS (24 VDC) and 4-20 mA,
¨ digital inputs volt free contacts powered by the DCS (24 VDC),
¨ digital outputs are powered:
§ either by the DCS/ESD (24 VDC)
§ or externally : 24 VDC to other system, 125 VDC to MCC.
As general rule :
¨ Status information is true when the input contact is closed (hardwired input) or bit to 1 (serial
input).
Example :
§ an on/off valve will be closed when its limit switch XZSC or UZSC will be closed,
§ an on/off valve will be open when its limit switch XZSO or UZSO will be closed.
¨ Alarm is active when the input contact is open (hardwired input) or bit to 0 (serial input).

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10. LIST OF FUNCTIONAL BLOCKS
Refer to table of contents page 3 for the list of functional blocks that are part of this specification.
Others functional blocks:
TYPICALS
(see note)
UNITDESCRIPTION
C102 12 Vacuum Heater 01-F 20-01 - Flow control
C103 11/12Crude Heater 01-F-10-01 / 01-F 20-01 - Temperature control
C105 12/23Steam drum 01-V-20-05 / 02-E-30-04 - Level control
C106 11 Crude to heater 01-F-10-01 - Pressure and flow control
C107 11 Heater 01-F 10-01 - Flow control
C108 11 Exchanger load sharing
C109 11 Desalting water surge drum 01- V-10 03 - Level control
C110 11 HVO product cooler 01-EA-10-10 - Temperature control
C111 12 Steam injection to vacuum heaters 01-F 20-01 - Flow control
C112 21 Naphtha/Hydrogen & Naphtha diluent - Flow ratio control
C113 21 Dedienisation Reactor 02-R-10-01 - Temperature Control
C114 12 Atmospheric / Vacuum residue from 01-C-20-01
C116 21 Stripper 02-C-10-02 - Level Control
C117 21/23Gasoil Blend Feed Filter 02-S-10-01/02-S-30-01 - Differ. Pressure Control
C119 23 MHC reaction trains - Feed pressure and flow control
C120 23 Hydrogen Make up compression 02-K-30-02 A/B – Pressure control
C122 21 Stripper reflux drum 02-V-10-08 - Level control
C123 21 Lean amine cooler 02-E-10-10 - Flow control
C124 21 Saturate gas amine absorber 02-C-10-61 - Temperature Control
C125 21 Saturate Gas Amine Absorber 02-C-10-61 - Overhead Flow Control
C126 21 Naphtha Splitter 02-C-10-05 - Level control
C127 21 Naphtha Splitter Reflux Drum 02-V-10-11 - Pressure control
C128 23 Recycle compressor 02-K-30-01 - Surge control
C129 21 Recycle compressor 02-K-10-01 - Surge control
C130 23 Syncrude product pumps 02-P-30-51 A/B/S - Mini flow control
C131 12 Vacuum residue to Storage - Flow control
C132 23 Reactor beds - Temperature control
C133 12 Differential pressure control (on/off valve)
C134 21 Reactor beds - Temperature control
C135 23 Washing water drum 02-V-30-10 - Level control
C136 21 Reactor beds - Temperature control
C138 21 Recirculation operation in MHC Unit and NDHDT Unit
C139 21/23LPG / Naphtha mixer 02-M-10-01 - Pressure control
C140 11 Pump mini flow control
C141 21/23Turbine 02-KT-10-01, 02-KT-30-01 - Speed set point
C142 23 Start of stand-by pump

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C143 23 Washing naphtha drum 02-V-10-06 – Level control
I100 21/23Reactor Bed - Weight Average Temperature
I101 23 Syncrude - Bubble Temperature
I102 23 Flow ratio between recycled pure H2 and liquid feed train 1
I103 23 Flow ratio between recycled pure H2 and liquid feed train 2
I104 23 Hydrogen Partial Pressure at 02-R-30-02 outlet
I105 24 Hydrogen Partial Pressure at 02-R-40-02 outlet
I106 21 Hydrogen Partial Pressure at 02-R-10-03 outlet
I107 21 Hydrogen Partial Pressure at 02-R-10-02 outlet
L100 23 Reactor bed Differential Temperature from six thermocouples
L102 23 Reactor bed Differential Temperature from six thermocouples
L103 21 Reactor bed Differential Temperature from eight thermocouples
L104 21 Reactor bed Differential Temperature from eight thermocouples
L105 23 Reactor bed Differential Temperature from six thermocouples
Note : refer to
¨ unit 11 : Control Narrative SP 5730D 11 1510 001
¨ unit 12 : Control Narrative SP 5730D 12 1510 001
¨ unit 21 : Control Narrative SP 5730D 21 1510 001
¨ unit 23 & 24 : Control Narrative SP 5730D 23 1510 001

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11. DCS FUNCTIONAL BLOCKS FOR CONTROL
These typical shall be read in conjunction with the SP 5730D 00 1510 02 “Typical loops for Control
System” and field “LOOP_TYP” of Control System Database.
11.1 Typical C01 – Single control
Note 1: Reverse action in order to get 100% at the controller output indicator in case of fail open
control valve as follows
Analog output to FC valve:
§ 4 mA represents 0 % output on the overlay = fully closed
§ 20 mA represents 100 % output on the overlay = fully open
Analog output to FO valve:
§ 4 mA represents 100 % output on the overlay = fully open
§ 20 mA represents 0 % output on the overlay = fully closed
Note 2: Refer to SP 5730D 00 1510 02
For initial state and default on I/O refer to § 6
-T
-C
-I
option A5
Note 2
FC
LOOP_TYP R1
-T
-C
-I
option A5
Note 2
FO
-Y
REV
Note 1

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11.2 Typical C02 – Cascade control
Note 1: The output of the master controller shall be 0-100%. Scale of the slave controller set point
shall be the same as the secondary measurement. Therefore additional block (e.g. CALC) for
scaling have to be implemented ( this CALC block receives the scale parameters from input block)
Note 2: When the slave controller is switched from Remote to Local mode, the master controller
shall be locked in Auto mode with its output shall make tracking of the measurement of the slave
controller. The switch of slave controller to Remote mode shall unlock the tracking of the master
controller; this transition shall be bumpless. The mode of master controller is not accessible
directly. The rule for bad value or out of range measurement applies also to master and slave
controllers in Remote mode.
Set PointControl OutputModeProcess value Comments
Master U TR SP S M MtInitial state
SlaveTR PV FP M Mt
Master U U M MtDefault on Slave
input
SlaveTR PV U M F
Master U U M FDefault on Master
input
SlaveU or TR
PV
U L Mt
Except from out of
range for flow and
level services
When a bad measurement appears on slave controller, slave controller will switch from Cascade to
Manual mode and master controller from Auto to Manual mode.
TYPICAL C01
-T
loop name
-C
SP
ENGINEERING
UNIT
-I
SLAVE SET POINT TRACKING
-T
-C
-I
option A5
CALC
OUTPUT 0-100%
NOTE 1
LOOP_TYP R2
-Y
CALC
SCALING FACTOR
NOTE 2

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When a bad measurement appears on master controller, mode will switch from Auto to Manual
mode for master controller and from Cascade to Auto mode for slave controller (this allows slave
controller to continue to operate).
Out of range on flow and level:
Set PointControl OutputModeProcess value Comments
Master U U U FOut of range
Slave U U U F
For flow and level
services only

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11.3 Typical C03 – Split range control
Note 1: Output signal will have one of following characteristics (refer to Control System database
field “Remarks”). The characteristics give the fully open position of control valve with regard to the
output of PID block.
TYPICAL C01
-T
-C
-I
A B
-Y
Note 1
-Y AOUT 2
AOUT 1
LOOP_TYP R6

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OPEN
CLOSE
0 52 100
%
Split range type 1
Split range type 1A (50 instead of 52)
OPEN
CLOSE
0 48 100
%
Split range type 2
Split range type 2A (52 instead of 48)
OPEN
CLOSE
0 48 100
%
Split range type 3
OPEN
CLOSE
0 52 100
%
Split range type 4
Split range type 4A (50 instead of 52)
OPEN
%
Split range type 5
OPEN
CLOSE %
Split range type 6
X Y
CLOSE
X Y
X and Y are provided in database field “Remarks” or in the control narratives.
Caution:
For FC control valve, the fully open position corresponds to 20 mA output signal.
For FO control valve, the same fully open position corresponds to 0 mA output signal (the output
signal shall be reversed as per typical C01, in order to get 100% at the controller output indicator).
For initial state and default on I/O refer to § 6.

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11.4 Typical C04- Controller with solenoid on control valve
-V
U
-ZSC
-C
S
-Y
I/P
-Y
DE
FC
-V
U
-ZSO
S
-Y
DE
FO
or
Y-ZLO
Y-ZLC
PID block forced to
manual mode:
output = 0% (FC valve)
output = 100% (FO valve)
-T
option R2
SP
LOOP_TYP A7 R1A3A3
or A7 R2A3A3
Typical C01 (R1)
or C02 (R2)
refer to typical C01
for reverse action
-ZT-ZI
option A
-ZT-ZI
option A
Refer to SP 00 1510 05
typical C04
Refer to SP 00 1510 05
typical C04

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ESD action is considered at 0 and return to normal at 1.
Case with typical C01:
In case of ESD action on the solenoid of the control valve of an independent control loop the
controller is forced to manual mode with the control output forced to the fail position, the set point is
kept at its current value.
On return to normal of the ESD action, the forcing is released, the controller stays in manual with
the output keeping the fail position, the operator has full control again.
Set PointControl OutputMode Process valueComments
ESD input = 0 U FP M Mt
ESD input : 0 Õ 1 U U M Mt
When ESD input returns to 1, the operator, to restore control, switches mode to Auto.
Case with typical C02:
In case of ESD action on the solenoid of a slave control loop, the action is taken on the slave loop
with the mode forced to Manual, the set point tracking the process value and the control output
forced to the fail position. On return to normal of the ESD action the forcing are released and the
operator has full control again.
If the slave mode is cascade, the master controller is switched from Auto to Manual mode and
control output of the master tracks the set point.
Set Point Control OutputMode Process value
ESD input = 0 Slave TR PV TR FP M Mt
ESD input = 0 Master U TR SP S M Mt
ESD input : 0 Õ 1 Slave TR PV U M Mt
ESD input : 0 Õ 1 Master U TR SP S M Mt
When ESD input returns to 1, Master Set Point is unchanged and Slave Set Point equals Slave
Process Value.
Operator, to restore control, switches the Slave to Auto and then to RSP.
For valve discordance refer to SP 5730D 00 1510 05.
For initial state and default on I/O refer to § 6.

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11.5 Typical C04B – Controller with output forced by heater logic
-T
-C
-I
option A5
Note 1
FC
LOOP_TYP R1
_KHF?
From heater logic
Forced to x%
Note 1: Refer to SP 5730D 00 1510 02
For initial state and default on I/O refer to § 6
In case of leak test from heater logic, the controller is forced to a predefined value in Manual mode
and the set point is kept at its current value. In a second time, the forcing is released; operator has
full control again. The “KHF” block appears on sheet 69 of each heater logic.
Heater Logic document N° KHF Number Set point value
02-F-10-01 2F11FD812 02-10-KHF-031 5 %
02-F-10-02 2F12FD862 02-10-KHF-081 5 %
02-F-30-01 2F31FD812 02-30-KHF-031 5 %
02-F-40-01 2F41FD812 02-40-KHF-031 5 %

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11.6 Typical C04C - Controller with solenoid on control valve and limit switch to DCS
-V
U
-ZSC
-C
S
-Y
I/P
-Y
DE
FC
-V
U
-ZSO
S
-Y
DE
FO
or
-ZLO
-ZLC
PID block forced to
manual mode:
output = 0% (FC valve)
output = 100% (FO valve)
-T
option R2
SP
LOOP_TYP A7 R1A3A3
or A7 R2A3A3
Typical C01 (R1)
or C02 (R2)
refer to typical C01
for reverse action
Refer to SP 00 1510 05
typical C04
Refer to SP 00 1510 05
typical C04
Refer to typical C04 for description

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11.7 Typical C05 – On-Off control with level indication (output to solenoid valve) gap controller
Set PointControl OutputMode Process value Comments
Initial state U FP NA Mt
Default on input U U NA F
LHL is an ON/OFF controller with dead band.
Output to solenoid is set to 1 when level is high. Reset to 0 is done at low level.
LSHL
S
IA
DE
LZSO
LZLO
LZSC
LZLC
LT LY
LOOP_TYP R7
HH
LL
LI
For discrepancy
alarm refer to L37B

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11.8 Typical C05A – On-Off control without level indicator (output to solenoid valve)
LSHL
S
IA
DE
LZSO
LZLO
LZSC
LZLC
LT LY
LOOP_TYP R7
Refer to typical C05 for description

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11.9 Typical C05B – On-Off control with level indication (output to solenoid valve
Refer to typical C05 for description, except:
Output to solenoid is set to 1 when level is low. Reset to 0 is done at high level.
LSHL
S
IA
DE
LZSO
LZLO
LZSC
LZLC
LT LY
LOOP_TYP R7
HH
LL
LI

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11.10 Typical C06 – Controller with low / high scale selection
FT-A is the low range transmitter
FT-B is the high range transmitter
Flow FY-A Measurement Controller linked to
lower than 90% of FT-A high scale FT-A
increase up to 95% FT-A
equal to or higher than 95% of FT-A high scaleFT-B
decrease down to 90% FT-B
When there is switching from one transmitter to the other, it will, at the same time, ramp the
previous value of measurement to the new value to avoid a measurement overshoot.
For initial state refer to § 6.1
Default on input (except out of range, refer to § 6.2):
Switch
position
Set
Point
Control
Output
Mode Process value
FY-A to FC M FDefault on input A
FY-B to FC
U U
U Mt (note 1)
FY-A to FC U Mt (note 2)Default on input B
FY-B to FC
U U
M F
Notes
1 – default on input A is alarmed to operator
2 - default on input B is alarmed to operator
FC
LOOP_TYP A3R1
FY
A
FY
B
FT
A
FT
B
Switch
FC

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11.11 Typical C07 – Controller with smooth switching facility between two control valves
The HS allows a smooth switching facility between two control valves. It has two positions A and B:
§ when on A, valve A is in control, valve B is in Fail Position,
§ when on B, valve B is in control, valve A is in Fail Position.
When switching from one position to the other, it will, at the same time, to avoid flow interruption:
§ open with ramp the closed valve,
§ close with ramp the open valve.
The ramping time must be configurable.
When ramping, A and B must be flashing near the HS. When in steady position , a steady A and B
will be displayed.
For initial state and default on I/O refer to § 6.
-T
-C
LOOP_TYP R9
HS
A B

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11.12 Typical C08 –Level control by start/stop pump command
Start command :
¨ either when level is high, by LSH,
¨ or by operator command HSH
both commands provide a pulse to 1 to EMCS
Stop command
¨ either when level is low, by LSL, command is latched to 0 as long as the level is low
¨ or by operator command HSL, pulse to 0
Notes
1. refer to Typical M01A or M03A for detail of motor monitoring and discordance alarm
2. LALL/LAHH will be used for alarming except in those cases where a LL/HH trip exists, where
LAL/LAH will be used
LT LY
Start : pulse to 1 (5 seconds)
Stop : pulse to 0 (5 seconds)
LSH or
HSH
LSL or
HSL
LI HH
LL
LOOP_TYP R7 D6
note 1
note 1
TYPICAL M01A or M03A - note 1
&
Remote position
Gateway
to EMCS
note 2

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11.13 Typical C08A – Level control by stop pump command
Stop command:
¨ either when level is low, by LSL, command is latched to 0 as long as the level is low
¨ or by operator command HSL, pulse to 0
Note 1: refer to Typical M01 for detail of motor monitoring and discordance alarm
LT LY
Stop : pulse to 0 (5 seconds)
LSL or
HSL
LI HH
LL
LOOP_TYP R7 D6
note 1
TYPICAL M01- note 1
Gateway
to EMCS

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11.14 Typical C09 – Automatic start of stand-by pump
M
MC
C
A
or
Local
Stop
HX
M
MC
C
S
Local
Stop
HX
S
R
or
&
Gateway
M
MC
C
EMCS
or
A
PT
&
PSLL
HXB
A
Remote
Start
&
Gateway
M
MC
C
EMCS
or
S
HXB
S
Remote
HS
A
Start
FBM41
Refer to typical M01
Motor status
Motor status
Run
Run
HXL
S
HS
A
S
A
HS
A
HS
S
Stop
AUTO TRANSFER
Typical M01
Typical M01
HXL
A
S
R &
&
S
R
Stop
Temporisation
1 sec
TYPICAL C09A
time delay
5 sec
time delay
15 sec

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Start command :
¨ either by low low pressure, after temporisation, at pump discharge,
¨ or by operator command HS start, in remote operation,
both commands provide a pulse to 1 to EMCS.
Start command by low low pressure is inhibited if local stop of either pump A or pump S is activated
pulsed at 1, latched during 5 seconds by DCS. The reset of this inhibition is done when one of the
two pumps is started either locally or by operator from the console.
Start command form PSLL is sent only to the pump that was not running before the command
order.
During an auto transfer (signal latched to 1) of pump power supply from bus bar A to bus bar B
(refer to typical C09A), the command of pump from PSLL is inhibited. This command is sent only
when the auto transfer is achieved, after time delay, in order to provide enough time to normal
operating pump to start and to allow the pump downstream pressure to become normal.
Note : refer to typical M01 for detail of motor monitoring and discordance alarm.

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11.15 Typical C09A – Auto-transfer
or
or
Typical C09 or
C142
Configuration 1
Typical C09
Configuration 2
02-10-XS-918 (LV-42)
02-10-XS-917 (LV-41)
02-10-XS-916 (HV-40) or
CONFIGURATIONMOTORS
1 (LV-41)2 (LV-42)
02-P-10-04A/S X
02-P-10-05A/S X
02-P-10-07A/S X
02-P-10-52A/S X
02-P-30-04A/S X
02-P-30-51A/B/S X
EMCS EMCS
EMCS
HV 40
LV 41
LV 42
M M M M M M M M
Bus bar A Bus bar B
Bus bar A Bus bar B Bus bar A Bus bar B

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11.16 Typical C10 – Start and stop of pumps by LSHL with operator selection of pump to be
started
LT LY
Start : pulse to 1 (5 seconds)
Stop : pulse to 0 (5 seconds)
LSH
or
HS
A
LSL or
HS
A
-HSH?
TYPICAL M01A (Note 1)
&
Remote position
Gateway
Start : pulse to 1 (5 seconds)
Stop : pulse to 0 (5 seconds)
or
HS
S
or
HS
S
-HSH?
&
Remote position
Gateway
A
M
MCC
EMCS
SM
MCC
EMCS
LI
HS
HH
LL

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Start command :
¨ either when level is high for the selected pump by the operator,
¨ or by operator command HS
both command provide a pulse to 1 to EMCS
Stop command :
¨ either when level is low by LSL, command is latched to 0 as far as the level is low (the stop
command is sent to both pumps)
¨ or by operator command HS, pulse to 0
Note : 1 - refer to typical M01A for detail of motor monitoring and discordance alarm

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11.17 Typical C10A – Start and stop of pumps by LSHL with operator selection of pump to be
started and level controller
LT LY
Start : pulse to 1 (5 seconds)
Stop : pulse to 0 (5 seconds)
LSH
or
HS
A
LSL or
HS
A
-HSH?
TYPICAL M01A (Note 1)
&
Remote position
Gateway
Start : pulse to 1 (5 seconds)
Stop : pulse to 0 (5 seconds)
or
HS
S
or
HS
S
-HSH?
&
Remote position
Gateway
A
M
MCC
EMCS
SM
MCC
EMCS
-C
HS

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Start command :
¨ either when level is high for the selected pump by the operator,
¨ or by operator command HS
both command provide a pulse to 1 to EMCS
Stop command :
¨ either when level is low by LSL, command is latched to 0 as far as the level is low (the stop
command is sent to both pumps)
¨ or by operator command HS, pulse to 0
Note 1: refer to typical M01A for detail of motor monitoring and discordance alarm

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11.18 Typical C10B - Start and stop of pumps by LSHL with operator selection of pump to be
started and automatic start of stand-by pump if main one not start after a time delay
LT LY
Start : pulse to 1 (5 seconds)
Stop : pulse to 0 (5 seconds)
LSH
or
HS
A
LSL or
HS
A
-HSH?
TYPICAL M01A (Note 1)
&
Remote position
Gateway
Start : pulse to 1 (5 seconds)
Stop : pulse to 0 (5 seconds)
or
HS
S
or
HS
S
-HSH?
&
Remote position
Gateway
A
M
MCC
EMCS
SM
MCC
EMCS
HXL
A
time delay
5 sec
S
R
HXL
S
time delay
5 sec
S
R
HS

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Start command :
¨ either when level is high for the selected pump by the operator,
¨ either if the main pump not start after a time delay,
¨ or by operator command HS
all commands provide a pulse to 1 to EMCS
Stop command :
¨ either when level is low by LSL, command is latched to 0 as far as the level is low (the stop
command is sent to both pumps)
¨ or by operator command HS, pulse to 0
Note : 1 - refer to typical M01A for detail of motor monitoring and discordance alarm

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11.19 Typical C11 – Single control with input signal from ESD system
For 2 out of 3 scheme, selection of medium measurement value (selection 1 out of 3 excluding the
maximum and the minimum values) is done at ESD system level as input signal to the controller
(refer to SP 5730D 00 1510 05 typical E11, E12)
For initial state and default on I/O refer to § 6.
“Default on input” means default on all transmitters used for voting.
Note 1: Reverse action in order to get 100% at the control output indicator in case of fail open
control valve.
-C
MID
FC
from ESD
refer to typical:
E11, E12, etc
SP 5730D 00 1510 05
LOOP_TYP
/-/-R1
FO
-C -Y
REV
Note 1
from ESD
refer to typical:
E11, E12, etc
SP 5730D 00 1510 05
MID

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11.20 Typical C11A – Single control with input signal from ESD system and output forced by
heater logic
FO
Note 1
LOOP_TYP R1
_KHF?
From heater logic
Forced to 100%
-C -Y
REVMID
from ESD
refer to typical E12
SP 5730D 00 1510 05
_ZSC _ZSO __ZI
_ZLC _ZLO _ZI
U
Forced to 0%
Gas Detection from Cause & Effect Chart
Note 1: Reverse action in order to get 100% at the controller output indicator in case of fail open
control valve as follows
§ 4 mA represents 100 % output on the overlay = fully open
§ 20 mA represents 0 % output on the overlay = fully closed
For 2 out of 3 scheme, selection of medium measurement value (selection 1 out of 3 excluding the
maximum and the minimum values) is done at ESD system level as input signal to the controller
(refer to SP 5730D 00 1510 05 typical E12).
For initial state and default on I/O refer to § 6. “Default on input” means default on all transmitters
used for voting.
In case of leak test from heater logic, the set point is switched to tracking mode (while kept in Auto)
to drive the output to a predefined value in Automatic mode. In a second time, the forcing is
released; the controller switches to manual mode with the same output and operator has full control
again. The KHF point is on page 20 of heater logic.

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Heater Logic document N° KHF Number Set point value
01-F-10-01A 1F11FD812 01-10-KHF-010 100 %
01-F-10-01B 1F11FD862 01-10-KHF-060 100 %
01-F-20-01A 1F21FD812 01-20-KHF-010 100 %
01-F-20-01B 1F21FD862 01-20-KHF-060 100 %
02-F-10-01 2F11FD812 02-10-KHF-010 100 %
02-F-10-02 2F12FD862 02-10-KHF-060 100 %
02-F-30-01 2F31FD812 02-30-KHF-010 100 %
02-F-40-01 2F41FD812 02-40-KHF-010 100 %
In case of gas detection (refer to Cause and Effect Chart), controller mode is set to Manual mode
and controller’s output is forced to 0%. Forcing is released when there is no more gas detection.

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11.21 Typical C12 – Cascade control with input signal from ESD system
Refer to typical C02 for description and note
Master controller:
¨ For 2 out of 3 scheme, selection of medium measurement value (selection 1 out of 3 excluding
the maximum and the minimum values) is done at ESD system level as input signal to the
controller (refer to SP 5730D 00 1510 05).
¨ “Default on Master input” means default on all transmitters used for voting.
LOOP_TYP
/-/-R2
from ESD
refer to typical:
E11, E12, etc
SP 5730D 00 1510 05
FEEDBACK
TYPICAL C01
-T
loop name
-C
SP
ENGINEERING
UNIT
-I
-C
CALC
Output 0-100%
NOTE 1
-Y
CALC

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11.22 Typical C13 – Split range control, with input signal from ESD system
Refer to typical C03 for description and note
Master controller:
¨ For 2 out of 3 scheme, selection of medium measurement value (selection 1 out of 3 excluding
the maximum and the minimum values) is done at ESD system level as input signal to the
controller (refer to SP 5730D 00 1510 05).
¨ “Default on Master input” means default on all transmitters used for voting.
TYPICAL C01
A B
-Y
Note 1
-Y AOUT 2
AOUT 1
LOOP_TYP R6
-C
MID
from ESD
refer to typical:
E11, E12, etc
SP 5730D 00 1510 05

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11.23 Typical C14 – Controller with solenoid on control valve, with input signal from ESD system
from ESD
LOOP_TYP /-/-R1A3A3
or /-/-R2A3A3
-V
U
-ZSC
S
-Y
DE
FC
-V
U
-ZSO
S
-Y
DE
FO
or
Y-ZLO
Y-ZLC
PID block forced to
manual mode:
output = 0% (FC valve)
output = 100% (FO valve)
Typical C01 (R1)
or C02 (R2)
-C -Y
I/P
MID
refer to typical :
E11, E12, etc
SP 5730D 00 1510 05
SP
Option R2
refer to typical C01
for reverse action
-ZT-ZI
option A
-ZT-ZI
option A
Refer to SP 00 1510 05
typical C04
Refer to SP 00 1510 05
typical C04

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Refer to typical C04 for description.
For 2 out of 3 scheme, selection of medium measurement value (selection 1 out of 3 excluding the
maximum and the minimum values) is done at ESD system level as an input signal to the controller
(refer to SP 5730D 00 1510 05).
For initial state and default on I/O refer to § 6.
“Default on input” means default of all transmitters used for voting.

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11.24 Typical C15 – On-Off control (output to solenoid valve) with input signal from ESD system
Refer to typical C05 for description.
For 2 out of 3 scheme, selection of medium measurement value (selection 1 out of 3 excluding the
maximum and the minimum values) is done at ESD system level as an input signal to the controller
(refer to SP 5730D 00 1510 05).
For initial state and default on I/O refer to typical C05
“Default on input” means default of all transmitters used for voting.
LSHL
X
MID
S
IA
DE
LZSO
LZLO
LZSC
LZLC
from ESD
LOOP_TYP /-/-R7
refer to typical :
E11, E12, etc
SP 5730D 00 1510 05
LI

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SP6
11.25 Typical C17 – Controller with smooth switching facility between two control valves, with
input signal from ESD system
Refer to typical C07 for description and note
Master controller:
¨ For 2 out of 3 scheme, selection of medium measurement value (selection 1 out of 3 excluding
the maximum and the minimum values) is done at ESD system level as input signal to the
controller (refer to SP 5730D 00 1510 05).
¨ “Default on Master input” means default on all transmitters used for voting.
LOOP_TYP
R9
-C
MID
from ESD
refer to typical:
E11, E12, etc
SP 5730D 00 1510 05
HS
A B

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11.26 Typical C18 – Level control by start/stop pump command, with input signal from ESD
system
Refer to typical C08 for description.
For 2 out of 3 scheme, selection of medium measurement value (selection 1 out of 3 excluding the
maximum and the minimum values) is done at ESD system level as an input signal to the controller
(refer to SP 5730D 00 1510 05).
For initial state and default on I/O refer to typical C08
“Default on input” means default of all transmitters used for voting.
Note 1 : refer to Typical M01A for detail of motor monitoring and discordance
Start : pulse to 1 (5 seconds)
Stop : pulse to 0 (5 seconds)
LSH or
HSH
LSL or
HSL
LI HH
LL
LOOP_TYP R7 D6
-HSH?
note 1
note 1
TYPICAL M01A- note 1
&
Remote position
Gateway
to EMCS
from ESD
refer to typical:
E11, E12, etc
SP 5730D 00 1510 05

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11.27 Typical C21 – Controllers with output signal selector
Set PointControl OutputMode Process value Comments
Initial state U FP M Mt
Default on input U U M F
Selection of the lowest controller output signal to control valve. The non-controlling output shall
track the controlling output with a bias to limit the deviation between the two output signals.
-T
-C -Y -C
-I
-T
<
option A5
LOOP_TYP R9

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11.28 Typical C23 – Cascade control with split range
Refer to Typical C02 and C03 for description
typical C02
-T-T
-C
loop name
-C
SP
A B
Typical C02 +C03
LOOP_TYP R9

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11.29 Typical C27 – Cascade control with smooth switching facility between two valves
Refer to Typical C02 and C07 for description
typical C02
-T-T
-C
loop name
-C
SP
Typical C07
LOOP_TYP R9
HS
A B

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11.30 Typical C31 – Hand controller
Refer to typical C01 for description and note
11.31 Typical C32 – Temperature control on air cooler exchanger
Each HC controller receives the same output TC signal.
Each HC controller can be set individually in AUTO or MANUAL mode
When HC mode is AUTO, the HC output equal HC input.
When HC mode is MANUAL, the output is set manually from HC controller.
TC Set PointControl OutputModeProcess valueComments
TC U 0% M MtInitial state
HCs NA 0% M 0%
TC U U M FDefault on input
HCs NA U U NA
-H
FC
LOOP_TYP H R5
-H
FO
-Y
REV
Note 1
TT
TC
HC
2
HC
1
E/P
E/P
LOOP_TYP R9

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11.32 Typical C33 – Hand control with two valves
11.33 Typical C34 – Hand controler to cooler louver
HC
M
M
HC
A B
-Y
-Y
AOUT 2
AOUT 1
LOOP_TYP H/-/-R6
HS

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11.34 Typical C35 – Hand controller with solenoid on control valve
HV
U
HZSC
HC
S
HY
I/P
HY
DE
FC
HV
U
HZSO
S
HY
DE
FO
or
HZLO
HZLC
Via ESD
Via ESD

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11.35 Typical C36 – Hand controller to two variable frequency drivers
HC
M
M

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11.36 Typical C37 – Cascade control with smooth switching facility between two valves, with input
signal from ESD system
HS
A B
-C
-T
SP
-C
MID
from
ESD
refer to typical :
E11, E12, etc
Refer to typical C02 and C07 for description

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12. DCS FUNCTIONAL BLOCKS FOR INDICATION
12.1 Typical I01 – Single indicator
12.2 Typical I03 – Differential input indicator
Default on input A or B : -DI-002 is fault
-T
-I
A
-I
option A5
AA
-I
option A5
BA
-I
option A5
-DI
002
001A
-T
001B
-T
-I
001A
-I
001B

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12.3 Typical I04 – Flow correction
F(x) : Flow correction
Three different configurations :
§ I04 : Flow with pressure and temperature compensation (Gas)
§ I04A : Flow with temperature compensation only (Liquid)
§ I04B : Flow with pressure compensation only (Gas)
In case of bad measurement of pressure and/or temperature, the calculation keeps the last
good value.
The formula for gas flow is: Flow (compensated) = Flow (raw) * Compterm where
Compterm =
)273(
)273)(1(
0
0
+
++
TP
TP
With: P0 = pressure in absolute bar
T0 = temperature in °C
P = measured pressure in relative bar
T = measured temperature in °C
PT TT
PI TI
FT
Flow
compensation
calculation
LOOP_TYP F1*
* or F2, F3,F4
FY
FI

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Tag Number PID Service P0 (Bar Abs)T0 (°C)
01-10-FT-18111-0030-27FUEL GAS TO 01-F-10-01-A CELL 1 4.95 65
01-10-FT-18211-0030-27FUEL GAS TO 01-F-10-01-A CELL 2 4.95 65
01-10-FT-18611-0030-28FUEL GAS TO 01-F-10-01-B CELL 1 4.95 65
01-10-FT-18711-0030-28FUEL GAS TO 01-F-10-01-B CELL 2 4.95 65
01-10-FT-23711-0040-65HS FROM BL UNIT 5300 41.7 385
01-10-FT-23811-0040-65MS FROM BL UNIT 5300 11.2 246
01-10-FT-23911-0040-65LS FROM BL UNIT 5300 5 154
01-10-FT-24411-0040-74FUEL GAS TO END HEADER 5 65
01-20-FT-12512-0030-18F.G. TO 01-F-20-01A CELL 1 4.8 65
01-20-FT-12612-0030-18F.G. TO 01-F-20-01A CELL 2 4.8 65
01-20-FT-13012-0030-19F.G. TO 01-F-20-01B CELL 1 4.8 65
01-20-FT-13112-0030-19F.G. TO 01-F-20-01B CELL 2 4.8 65
02-10-FT-80121-0040-55MS FLOW FROM BL UNIT 5300 11.3 246
02-10-FT-80221-0040-55HS FLOW TO BL UNIT 5300 42.4 385
02-10-FT-80721-0040-71FG FLOW FROM BL UNIT 5300 5.1 65
02-10-FT-80921-0040-55LS FLOW TO BL UNIT 5300 5 152
02-30-FT-80123-0040-51MS FROM BL UNIT 5300 11.7 246
02-30-FT-80223-0040-51HS FROM BL UNIT 5300 42.4 388
02-30-FT-80523-0040-58FUEL GAS FROM BL UNIT 5300 5.1 65
02-30-FT-81023-0040-51LS TO BL UNIT 5300 5 154
02-30-FT-91123-0030-27FUEL GAS FROM 02-V-30-52 4.8 65
02-40-FT-91124-0030-31FUEL GAS FROM 02-V-40-52 4.8 65
The formula for liquid flow is: Flow (compensated) = Flow (raw) * Compterm where
Compterm=
0D
DT
DT = product gravity at temperature, elaborated as follows:
D0 = gravity of calculation orifice
T = product temperature in °C
KUOP = product constant
D15 = product gravity at 15°C
DT = [ D
15
- (858 - 45 KUOP
D
15
) ( 1.8T - 28) 10
- 6- [ (
25.8 ( 1 - D
15
)
KUOP - 8.5
) (1.8T - 28)
2
10
- 7

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12.4 Typical I04C – Flow correction with two flow transmitters and temperature compensation
only
Typical I06
FY
A
FY
B
FT
A
FT
B
Switc
h
FI
TT
TI
Flo
w
compensation
calculation
FY

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12.5 Typical I04D – Flow correction with three flow transmitters
Typical I06A
FY
A
FY
B
FT
A
FT
B
Switc
h
FI
PT TT
PI TI
Flow
compensation
calculation
FY
FY
C
FT
C

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12.6 Typical I04E – Flow correction with two flow transmitters
Typical I06
FY
A
FY
B
FT
A
FT
B
Switc
h
FI
PT TT
PI TI
Flo
w
compensation
calculation
FY
12.7 Typical I05 – Temperature indicator via local remote cabinet (same as I01)
TE TY TI
T/C
or RTD

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12.8 Typical I06 - Indicator with low / high scale selection
FT-A is the low range transmitter
FT-B is the high range transmitter
Flow FY-A Measurement Indicator linked to
lower than 90% of FT-A high scale FT-A
increase up to 95% FT-A
equal to or higher than 95% of FT-A high scaleFT-B
decrease down to 90% FT-B
12.9 Typical I06A - Indicator with low / high scale selection and 3 flow transmitters
FT-A is the low range transmitter
FT-C is the high range transmitter
LOOP_TYP A3
FY
A
FY
B
FT
A
FT
B
Switch
FI
LOOP_TYP A3
FY
A
FY
B
FT
A
FT
B
Switch
FI
FY
B
FT
B

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Flow FY-A Measurement Indicator linked to
lower than 40% of FT-B FT-A
Increase up to 45% FT-A
Equal to or higher than 45% of FT-B high scaleFT-B
Between 45% and 90% of FT-B FT-B
Increase Up to 95% FT-B
Equal to or higher than 95% of FT-B high scaleFT-C
Decrease Down to 90% FT-B
12.10 Typical I07 – Local flow indication
FT
FI
FY
Used to provide 24V power supply to electronic local transmitter. There is no indication required to
operator.
12.11 Typical I08 – To summarize two flow measurements
FI
FI
FY FI

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12.12 Typical I09 – Average temperature calculation used in heater logic
TT TY
TT TY
TT TY
1st transmitter
2nd transmitter
n transmitter
AVERAGE
TI
TI
TI
ESD
(Heater logic)
_KHF?
TI
Average
The KHF point is on sheet 56 of the heater logic (see table here after).
Heater Logic document N° KHF Number
01-F-10-01A 1F11FD812 01-10-KHF-020
01-F-10-01B 1F11FD862 01-10-KHF-070
01-F-20-01A 1F21FD812 01-20-KHF-020
01-F-20-01B 1F21FD862 01-20-KHF-070
02-F-30-01 2F31FD812 02-30-KHF-020
02-F-40-01 2F41FD812 02-40-KHF-070
In case of bad entry, the last good value of the bad entry is used for the average calculation.

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12.13 Typical I10 – Indicator with high alarm on input deviation
-T -I
HDEV
A high rate of change alarm is generated if the value of the measure changes too fast. DCS
compares the last value of the input with the precedent one and an alarm is generated if the
difference between both is higher than a predefined value.
12.14 Typical I11 - Single indicator with input signal from ESD system
from ESD
-I
Refer to typical:
E11, E12, etc
SP 5730D 00 1510 05

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12.15 Typical I13 – Multiple differential pressure input indicator
PT PI
PT PI
PT PI
PDI
PDI
etc..
DCS_LOOPTYPICAL
02-10-P103To I106
02-10-P045To I107
02-30-P041To I104
02-40-P432To I105
12.16 Typical I23 – Differential input alarm from ESD system
-DALL
from ESD
refer to typical :
E08

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13. DCS FUNCTIONAL BLOCKS FOR LOGIC AND/OR ALARM
13.1 Typical L01 - Alarm
-S? : threshold function. Alarm = 0
13.2 Typical L01A – Alarm and input to logic from transmitter
_T?
_S?
_I? _A?
Input to Logic
? = L or H or
LL or HH
-S? : threshold function
LOGIC
IER UNIT EQUIPMENT DOCUMENT
9 62 Potable Water Unit Veneagua Doc. No. 937-P-I146-1-003 attachment to the Control and
Safeguarding Narrative Unit 6200. Potable Water Unit. SP 5731E 62
1511 001
9 63 Activated Carbon Filters.
Demineralization trains
Control and Safeguarding Narrative. Demineralized Water Unit
(DWU). Unit 6300. SP 5731E 63 1511 001
9 66 Plant Air Compressors Elliott Logic Drawings WC-DP0181 and WC-DP0174 attached to the
Control and Safeguarding Narrative. Plant and Instruments Air
System Unit. Unit 6600. SP 5731E 66 1511 001
9 64 BFW/Steam/Condensate
System
Control and Safeguarding Narrative. BFW/Steam/Condensate
System. Unit 6400. SP 5731E 64 1511 001
9 71 07-T-10-01A/B/C Control and Safeguarding Narrative. Fire Water Pumps. Unit 7100.
SP 5731E 64 1511 001
7 41 Waste Water Unit Control and Safeguarding Narrative Unit 4100. DB 5731E 41 15 01.
8 51 Tanks Control and Safeguarding Narrative Unit 5100. DB 5731E 51 15 01.
-T
-S? -A? ? = L or H or
LL or HH

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13.3 Typical L02 – Digital alarm
-S
-A?
or push button
from LP
? = L or H or LL or HH
(without extension in case of push button)
0 = Alarm
1 = Normal
-S : threshold function. Alarm = 0
13.4 Typical L02A – Digital alarm and Input to logic
_S?
_A?
Input to Logic
? = L or H or LL or HH
(without extension in case of pushbutton)
LOGIC
IER UNIT EQUIPMENT DOCUMENT
9 66 Plant Air Compressors Elliott Logic Drawings WC-DP0181 and WC-DP0174 attached to the
Control and Safeguarding Narrative. Plant and Instruments Air
System Unit. Unit 6600. SP 5731E 66 1511 001
7 41 Waste Water Unit Control and Safeguarding Narrative Unit 4100. DB 5731E 41 15 01.
8 51 Tanks Control and Safeguarding Narrative Unit 5100. DB 5731E 51 15 01.
13.5 Typical L03 – Digital output to alarm on LP
XLXS
COUT
Filter logic
Equipment Drawing
02-S-10-01 11781LD/10
02-S-10-03 11781LD/30

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13.6 Typical L03A – Digital output to pilot light on local panel
_S?
COUT
?=LL or L or HH or H
From instrument or from logic
XL
LOGIC
IER UNIT EQUIPMENT DOCUMENT
7 41 API separator
DAF units
Belt Filter
Sanitary PLant
Control and Safeguarding Narrative Unit 4100. DB
5731E 41 15 01.
9 62 06-PG-20-01 Control and Safeguarding Narrative Unit 6200.
Potable Water Unit. SP 5731E 62 1511 001
13.7 Typical L03B – Two digital outputs to two pilot lights on local panel
COUT
COUT
From instrument or from logic
_SHL?
XL
XL
LOGIC
IER UNIT EQUIPMENT DOCUMENT
9 62 06-T-20-03 Control and Safeguarding Narrative Unit 6200. Potable
Water Unit. SP 5731E 62 1511 001

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13.8 Typical L04 – Digital output to solenoid
-V
-ZSC
S
-Y
DE
FC
FO
-ZLC
Via ESD
-ZSO
-ZLO
Via ESD
XS
13.9 Typical L05 – Level or temperature command
LSHH
S
IA
DE
LT
TSHHTT
or
Deenergized
13.10 Typical L06 – Alarm
TE
TS TA?
? = L or H or LL or HH

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13.11 Typical L10 – Alarms from ESD to SMP
Refer to typical E09 in SP 5730D 00 1510 05
13.12 Typical L11A – Alarm from ESD or subsystem to DCS
ESD or
Subsystem
XA
13.13 Typical L15 – DCS command to filter logic
HS
Filtrex logic
Equipment 02-S-10-01 02-S-30-01
Logic Filtrex11781LD/10 11781LD/30

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13.14 Typical L37 – On/off valve command from DCS
Equipment 02-S-10-01 02-S-30-01
Logic Filtrex11781LD/10 11781LD/30
Note: The information “No close limit switch” is used as “Open limit switch” for DCS displays.
13.15 Typical L37A – On/off valve command from DCS (Veneagua logic)
_V
_Y
DE
_ZSC
IA
S
Refer to Veneagua
Logic
_ZSC
_ZLC _ZLO
XV
XY
DE
XZSC
XZLC
IA
S
Refer to Filtrex
logic
XA

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13.16 Typical L37B – On/off valve activated by the DCS by an Interlock or soft push button from
CCR
Logic .Logic .
UV-XXX
FC
UZSC
XXX
UZSO
XXX
UZLC
XXX
UZLO
XXX
HS
XXX
I
OPEN/CLOSE COMMAND FROM CCR:
Open - energize solenoid valve - output 1 logic.
Close - deenergize solenoide valve - output 0 logic.
I I
UV-XXX
FO
UZSC
XXX
UZSO
XXX
UZLC
XXX
UZLO
XXX
HS
XXX
I
OPEN/CLOSE COMMAND FROM CCR:
Open - deenergize solenoid valve - output 0 logic.
Close - energize solenoide valve - output 1 logic.
I I
LOGIC
IER UNIT EQUIPMENT DOCUMENT
8 51 Tanks Control Narrative Unit 5100. DB 5731E 51 15 01
A discrepancy alarm will be generated when there is a discrepancy between limit switches
and command for on/off valves.
Valve Failure Close
UY UZS
C
UZSO UAD
0 or 10 0 Set after time
delay
0 or 11 1 set
0 0 1 Set after time
delay
1 1 0 Set after time
delay
1 0 1 No alarm
0 1 0 No alarm
Valve Failure Open
UY UZS
C
UZSO UAD
0 or 10 0 Set after time
delay
0 or 11 1 set
1 0 1 Set after time
delay
0 1 0 Set after time
delay
0 0 1 No alarm
1 1 0 No alarm

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13.17 Typical L38 – On/off valve command from DCS without limit switches
_V
_Y
DE
IA
S
-S
13.18 Typical L39 – Motorized valve with commands from DCS without remote stop
M
XV
XS
XA
XZSO
XZLO
XZSC
XZLC
Monitor relay
Discordance
Alarm
S
R
or
time delay
5 sec
XHSCXHSO
maintained
S
R
time delay
5 sec
HDA
_C

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13.19 Typical L39A – Motorized valve with commands from DCS with remote stop
HS
XXXC
HS
XXXO
MZSC MZSO
XZSC XZSO XS
XA
M
MV
HDA
__C
Discordance
Alarm
Monitor Relay
S
R
S
R
or
time delay
5 sec
HS
XXXS
STOP OPEN CLOSE
time delay
5 sec

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14. DCS FUNCTIONAL BLOCK FOR MOTOR
14.1 Typical M01 – Motor DCS stop command and status
HXL
HXA
HXX
* M0 or M2
ready to start
Fault
Stop
LOOP_TYP H M*/-/-/-
EMCS
HXQCalc
Block
Run time
Gateway
Run
Gateway
HSL
from typical
C08, 09, 10, ...
IntensityHI
**
HI is part of Typical M01B
HAD
Discord. Alarm
M
MC
C
EMCS
or
To typical
C09
HSL
(when required)
(when required)

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Stop command to EMCS :
- From HSL, pulse at 0 latched during about 5 seconds, normal value is 1.
From logic, latched to 0 as long as the stop command provided by the logic is active.
Status from EMCS
HXL HXB HXA HXX
0 Non-run Non-remote Alarm Not ready to start
1 Run Remote No alarm Ready to start or running
Discordance alarm –HAD? (Generated by DCS)
Stop command :
_HSL?
Or logic
_HXL? _HAD? Remark
active 0 No alarm
active 1 set after time delay
Non active 1 No alarm Stop command can be from field
Non active 0 No alarm

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Typical M01A – Motor DCS start/stop command and status
HXL
HXX
* M3 or M4
ready to start
Fault
LOOP_TYP H M*/-/-/-
EMCS
HXQCalc
Block
Run time
Gateway
Run
Gateway
HSL
from typical
C08, 09, 10, ...
HXBLocal
Remote
IntensityHI
&Remote
**
HI is part of Typical M01AB
Start
HSH
from typical
C08, 09, 10, ...
HAD
Discord. Alarm
M
MC
C
EMCS
or
or
HSL
HSH
(when required)
(when required)
To typical
C09

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to EMCS :
-From HSL, pulse at 0 latched during about 5 seconds, normal value is 1.
-From logic, latched to 0 as long as the stop command provided by the logic is active.
An active stop command prevails over any start command (remote or local).
to EMCS :
From HSH, pulse at 1 during about 5 seconds, normal value is 0.
Start command is active only when HXB is in remote position =1
Status
HXL HXB HXX
0 Non-remote Electrical fault
1 Run Non electrical faultReady to start or running
motor to stop (it depends on the fault and protections inside the MCC drawer). The only action
of DCS is to update the fault indication in the multi-variable block of the motor.
breaker open, drawer in test position. It is only an information for operator.
Discordance alarm –HAD
Stop command :
_HSL? _HXL? _HAD?
active 0
active 1
Non active 1 Stop command can be from field
Non active No alarm
Start command :
Or logic
_HXL? Remark
active No alarm
active set after time delay
Non active No alarm Start command can be from field
0 No alarm

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14.3
MCC
EMCS
M
Typical OUT 1
Refer to SP 5730D 00 1510 05
STOP from ESD
Refer to Typical M01
(HI is part of typical M03B)
14.4 Typical M03A – Motor DCS start/stop command and stop command from ESD
MCC
EMCS
M
Typical OUT 1
Refer to SP 5730D 00 1510 05
STOP from ESD
Refer to Typical M01A
(HI is part of typical M03AB)

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14.5 Typical M04 – Compressor NUOVO PIGNONE
HXA
HXX
* M3 or M4
ready to start
Fault
LOOP_TYP H M*/-/-/-
EMCS
HXQCalc
Block
Run time
Gateway
Gateway
HXBLocal
Remote
M
MC
C
EMCS
HSL
HSH
Run
Refer to compressor logic
chapter 2
HXL
A

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14.6 Typical M05 – Motor start/stop command from ESD (NUOVO PIGNONE logic) (HYL/HYH) and
HXL
HXX
Ready to start
Fault
LOOP_TYP H /-/-/-
HXQCalc
Block
Run time
Run
Gateway
M
MC
C
EMCS
EMCS
Gateway
Typical OUT 3
Refer to SP 5730D 00 1510 05
START/STOP FROM ESD (HYH/HYL)
HXA
HI
INTENSITY
Typical
E01A
HSL
Permissive to run,
forced to 1
Signal not accessible to
operator
DCS
ESD

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14.7 Typical M05A –Motor start/stop command from ESD (NUOVO PIGNONE logic) (HYL/HYH)
Option 1 for lamps on compressor local panel
HXL
HXX
Ready to start
LOOP_TYP H /-/-/-
HXQCalc
Block
Run time
Run
Gateway
M
MC
C
EMCS
EMCS
Gateway
Typical OUT 3
Refer to SP 5730D 00 1510 05
START/STOP FROM ESD (HYH/HYL)
HI
INTENSITY
HSL
Permissive to run,
forced to 1
Signal not accessible to
operator
Fault
HXA DCS
COUT
XL
Option 1

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14.8 Typical M05B –Motor start/stop command from ESD (HYL/HYH) and Motor Status hardwired
to Compressor Logic, with serial signals from EMCS
HXL
HXX
Ready to start
HXQCalc
Block
Run time
Run
Gateway
M
MC
C
EMCS
EMCS
Gateway
Typical OUT 3
Refer to SP 5730D 00 1510 05
START/STOP FROM ESD (HYH/HYL)
HI
INTENSITY
HSL
Permissive to run,
forced to 1
Signal not accessible to
operator
Fault
HXA
LOGIC
COMPRESSOR
E250, E252
MOTOR STATUS HXL-xxxA
DCS

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14.9 Typical M06 – Motor DCS stop command and stop command from ESD, with pump status to
ESD
HXL
HXA
HXX ready to start
Fault
Stop
LOOP_TYP H /-/-/-
EMCS
HXQCalc
Block
Run time
Gateway
Run
Gateway
HSL
Intensity
HI
**
HI is part of Typical M01AB
HAD
Discord. Alarm
M
MC
C
EMCS
HSL
Refer to
typical E29
Typical E29
SP 5730D 00 1510 05
Stop main pump from ESD (HYL)

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14.10 Typical M07 – Motor ESD start/stop command
HXL
HXA
HXX ready to start
Fault
Stop
LOOP_TYP H M*/-/-/-
EMCS
HXQCalc
Block
Run time
Gateway
Run
Gateway
HSL
from typical
C08, 09, 10, ...
HXBLocal
Remote
Intensity
HI
&Remote
Start
HSH
from typical
C08, 09, 10, ...
HAD
Discord. Alarm
M
MC
C
EMCS
or
or
HSL
HSH
(when required)
(when required)
To typical
C09
Typical C130
Typical C142
Typical OUT4
Cause & Effect
Chart Process
Start/stop command from ESD (HYH/HYL)

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14.11 Typical M07A – Motor ESD start/stop command
HXL
HXA
HXX
* M3 or M4
ready to start
Fault
Stop
LOOP_TYP H M*/-/-/-
EMCS
HXQCalc
Block
Run time
Gateway
Run
Gateway
HSL
from typical
C08, 09, 10, ...
HXBLocal
Remote
Intensity
HI
&Remote
Start
HSH
from typical
C08, 09, 10, ...
HAD
Discord. Alarm
M
MC
C
EMCS
or
or
HSL
HSH
(when required)
(when required)
To typical
C09
When required
Typical OUT4
Cause & Effect
Chart Process
Start/stop command from ESD (HYH/HYL)
Same as M07 except

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14.12 Typical M08 – Motor status
Fault
Run time
Run
HXX
HXL HXQCalc
block
Gateway
M
MC
C
EMCS
HSL
Permissive to run,
forced to 1
Signal not accessible to
operator

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14.13 Typical M09 – Motor DCS start/stop command, stop command from ESD and automatic start
of stand by pump
MCC
EMCS
M
Typical OUT 1
Refer to SP 5730D 00 1510 05
STOP from ESD
Refer to Typical M01A
A
MCC
EMCS
M
Typical OUT 1
Refer to SP 5730D 00 1510 05
STOP from ESD
Refer to Typical M01A
S
Refer to
Typical C09

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14.14 Typical M10 – Motor DCS start/stop command, stop command from ESD and start/stop of
pumps by LSHL and operator selection of pump to be started
MCC
EMCS
M
Typical OUT 1
Refer to SP 5730D 00 1510 05
STOP from ESD
Refer to Typical M01A
A
MCC
EMCS
M
Typical OUT 1
Refer to SP 5730D 00 1510 05
STOP from ESD
Refer to Typical M01A
S
Refer to
Typical C10