Samson FOUNDATION 3730-5 Instruction sheet

Conguration Manual
KH 8384-5 EN
Firmware version K 3.0x
Translation of original instructions
Edition December 2017
Series3730
Type3730-5 Electropneumatic Positioner
Communication: FOUNDATION™ eldbus

2 KH 8384-5 EN
Note on this manual
This manual assists you in mounting and operating the device safely. The manual is binding
for handling SAMSON devices.
ÎFor the safe and proper use of this manual, read it carefully and keep it for later
reference.
ÎIf you have any questions about this manual, contact SAMSON‘s After-sales Service
Department (aftersalesser[email protected]).
The manual for the devices is included in the scope of delivery. The latest
documentation is available on our website (www.samson.de) > Product
documentation. You can enter the document number or type number in the
[Find:] eld to look for a document.
Denition of signal words
Hazardous situations which, if not avoided,
will result in death or serious injury
Hazardous situations which, if not avoided,
could result in death or serious injury
Property damage message or malfunction
Additional information
Recommended action
DANGER
!
WARNING
!
NOTICE
!
Note
Tip
Installation, start-up and on-site operation of the positioner are described in the Mounting
and Operating Instructions uEB8384-5.
NOTICE
!

Contents
KH 8384-5 EN 3
1 Introduction ..................................................................................................8
2 Design and principle of operation ..................................................................9
2.1 Application type ..........................................................................................10
2.2 Additional equipment...................................................................................11
2.3 Conguration using TROVIS-VIEW................................................................12
2.4 Communication ...........................................................................................12
3 FOUNDATION™ eldbus block model...........................................................12
4 Initialization and zero calibration of the positioner .......................................13
5 Resetting the positioner................................................................................14
6 Status classication and condensed state......................................................15
7 Block model ................................................................................................15
7.1 Resource Block (RES) ....................................................................................15
7.2 Transducer Blocks.........................................................................................16
7.3 Advanced Positioner Transducer Block (AO TRD) ............................................17
7.4 Function blocks ............................................................................................18
7.4.1 Analog Output Function Block (AOFB) ..........................................................18
7.4.2 Proportional Integral Derivative Function Block (PID)........................................22
7.4.3 Discrete Input Function Block (DI1 FB + DI2 FB)...............................................24
8 Other parameters........................................................................................26
8.1 Link Objects.................................................................................................26
8.2 LAS Functionality .........................................................................................26
9 Parameter lists ............................................................................................27
9.1 Resource Block (RES) ....................................................................................28
9.2 Advanced Positioner Transducer Block (AO TRD) ............................................43
9.3 Analog Output Function Block (AOFB) ..........................................................83
9.4 Analog Input Function Block (AI FB)...............................................................91
9.5 Proportional Integral Derivative Function Block (PID)........................................99
9.6 Discrete Output Function Block (DO FB) .......................................................115
9.7 Discrete Input Function Block (DI1 FB + DI2 FB).............................................121

4 KH 8384-5 EN
Firmware revisions (Communication K)
K 1.21
• "Device not initialized" diagnostic alarm: the diagnostic alarm “Device not initialized” is
generated when the positioner is not initialized and the condensed state is set to “Maintenance
alarm”.
• Leakage sensor at binary input 2: The connection of a leakage sensor at binary input 2 (by
selecting LEAKAGE SENSOR in CONFIG_BINARY_INPUT2 parameter of the AO Transducer
Block) causes:
• Information specied in XD_ERROR_EXT parameter in the AO Transducer Block and the
generation of a diagnostic alarm which is logged
• The state of the binary input is reported in BINARY_INPUT2 parameter in the AO Transducer
Block
The connection of a leakage sensor at binary input 2 (by selecting LEAKAGE SENSOR in
CONFIG_BINARY_INPUT2 parameter of the AO Transducer Block) causes:
• Information specied in XD_ERROR_EXT parameter in the AO Transducer Block and the
generation of a diagnostic alarm which is logged
• The state of the binary input is reported in BINARY_INPUT2 parameter in the AO Transducer
Block
• Display of the operating range FINAL_VALUE_RANGE: the correction of the operating range
FINAL_VALUE_RANGE over on-site operation of the positioner (Code 8/9) is also transferred
over eldbus in rmware version K1.21 and higher.
• De-energized internal solenoid valve: a masking allows to set whether a de-energized internal
solenoid valve generates an AO block error, resulting in a block alarm.
• SOLENOID_SELECT parameter: the SOLENOID_SELECT parameter in rmware K1.21 and
higher allows to set whether a "Maintenance now" block error of the AO Transducer Block results
in an output error in the AO Function Block.
• TOT_VALVE_TRAV_LIM parameter: new range: 1000 to 990 000 000
K 1.22
• Operating range FINAL_VALUE_RANGE: the operating range FINAL_VALUE_RANGE of the AO
Transducer Block is compared on entering it with TRANSM_PIN_POS.
If the TRANSM_PIN_POS parameter is changed, the positioner checks whether the setting and
unit match the current operating range FINAL_VALUE_RANGE. If this is not the case, the FINAL_
VALUE_RANGE parameter is set to 0 to 100%.
• VALVE_TYPE parameter: the parameter of the AO Transducer Block is set depending on the
selected PIN_POS. The last setting is kept when VALVE_TYPE is set to OFF.
• FINAL_VALUE parameter: the output value is scaled with FINAL_VALUE_ RANGE in rmware
K1.22 and higher and not as previously with XD_SCALE.
• Display of O/S mode in AO Transducer Block: if the AO Transducer Block is set to O/S mode,
this is indicated in the positioner display by MAN/AUTO.
K 1.23
Internal revisions

KH 8384-5 EN 5
Firmware revisions (Communication K)
K 1.24
• BUS_ADDRESS parameter: the bus address has the default setting of 248.
• Device type: in the delivered state, the device is congured as a basic device.
K 1.25
Internal revisions
K 2.01
• Additional function blocks: 2x DO (Discrete Output), 1x IS (Input Selector), 1x MAI (Multiple
Analog Input), 1x MAO (Multiple Analog Output).
• New functions: the following new functions are implemented in the DO Function Block (Discrete
Output):
• Discrete analysis of on/off valves
• Start partial stroke test (PST)
• Start and reset the data logger
• Resetting the diagnosis
• Stop diagnosis
• Move to fail-safe position
• Lock on-site operation
• Action on fault detection: If the AO Transducer Block is in O/S mode and the condensed state
changes to "Maintenance alarm", the following actions can be started:
• Hold last value
• Move valve to fail-safe position
• Move to a predened fault state value
K 2.02
Partial stroke test (PST): conguration of the partial stroke test (PST) over the FF parameters is no
longer possible. Conguration over the TROVIS-VIEW software is still possible.
K 2.03
Partial stroke test (PST): conguration of the partial stroke test (PST) over the FF parameters is no
longer possible. Conguration over the TROVIS-VIEW software is still possible. The partial stroke test
can be started over the binary input BI2.
K 2.04
Internal revisions
K 2.05
Internal revisions
K 2.06
Process control system: new rmware compatible with Honeywell Experion®control system.
Communication: improved communication of valve positions smaller than –0.9%.
K 2.07
Testing device functioning: monitoring of internal device communication has been added to the cyclic
testing of the device functions.

6 KH 8384-5 EN
Firmware revisions (Communication K)
K3.01
• Certied according to ITK6.2.0
• Diagnostics specication according to FF-912
• Function block added: AI (Analog Input)
• Function blocks removed: MAI (Multiple Analog Input), MAO (Multiple Analog Output), IS (Input
Selector)

KH 8384-5 EN 7

8 KH 8384-5 EN
Introduction
1 Introduction
This document is based upon:
−Fieldbus FOUNDATION™Specication "Function Block Application Process Part 1 – 3"
Revision 1.7 (FF-890 to FF-892)
−Fieldbus FOUNDATION™Specication "Positioner Transducer Block" Revision 3.0 (FF-906)
Type3730-5 Positioner
The microprocessor-controlled positioner compares the set point cyclically transmitted over
the FOUNDATION™ eldbus network to the travel or opening angle of the control valve and
issues a corresponding output signal pressure.
Special features:
−Link Master Capability
−Simple attachment to all common linear actuators with interface for SAMSON direct attach-
ment, NAMUR rib or valves with rod-type yokes according to IEC60534-6-1 or to rotary
actuators according to VDI/VDE3845
−Any desired mounting position of the positioner
−One-knob, menu-driven operation
−Automatic start-up
−LCD easy to read in any mounted position due to selectable reading direction
−Integrated EXPERTplus diagnostics suitable for throttling and on/off valves and with addi-
tional partial stroke test for valves in safety-instrumented systems
−Classied status messages acc. to NAMUR Recommendation NE107
−Online changing of control parameters
−Automatic zero monitoring
−Calibrated travel sensor without gears susceptible to wear
−Permanent storage of parameters (protected against power failure)
−Adjustable output pressure limitation
−Activatable tight-closing function
−Binary input for DC voltage signals
−Certied according to IEC61508/SIL

KH 8384-5 EN 9
Design and principle of operation
2 Design and principle of operation
The positioner is mounted on pneumatic control valves and is used to assign the valve posi-
tion (controlled variablex) to the control signal (set pointw). The positioner compares the
control signal of a control system to the travel or rotational angle of the control valve and is-
sues a signal pressure (output variable y) for the pneumatic actuator.
The positioner mainly consists of an electric travel sensor system, an analog i/p converter
with a downstream air capacity booster and the electronics with the microcontroller.
When a set point deviation occurs, the actuator is either vented or lled with air. If neces-
sary, the signal pressure change can be slowed down by a volume restriction. The signal
pressure supplied to the actuator can be limited by software or on site to 1.4, 2.4 or 3.7bar.
The xed ow regulator ensures a constant air ow to the atmosphere, which is used to ush
the inside of the positioner housing and to optimize the air capacity booster. The i/p convert-
er is supplied with a constant upstream pressure by the pressure regulator to compensate for
any uctuations in the supply pressure.
1 Control valve
2 Travel sensor
3 PD controller
4A/D converter
5 Microcontroller
6i/p converter
7 Air capacity booster
8 Pressure regulator
9 Flow regulator
10 Volume restriction
11* Inductive limit contact
12* Solenoid valve
13 IEC61158-2 interface
module
14 Binary input BI1 (passive)
15* Binary input BI2 (active)
16 Display
17* Actuation of solenoid valve
18* Electrical insulation
19 D/A converter
20 Communication interface
* Options
w
x
Q
%
S
mm
GG
PD
Serial
Interface 16
15
BE2
BE1
112
4
13
20
17 18
19
24V DC
5
3
12
6
7
8
10
1
14
9
x
y
Fig.1: Functional diagram

10 KH 8384-5 EN
Design and principle of operation
The positioner communicates and is powered using IEC61158-2 transmission technology
conforming to FOUNDATION™ eldbus specication.
As a standard feature, the positioner comes with a binary input used to signalize process in-
formation over the FOUNDATION™ eldbus network.
The extended EXPERTplus diagnostics are integrated into the positioner. They provide infor-
mation on the positioner and generate diagnostic and status messages, which allow faults to
be pinpointed quickly.
2.1 Application type
The application types 'Control valve' and 'On/off valve' are available. The manual mode
(MAN) and the automatic mode (AUTO) can be selected with both application types.
Depending on the application type selected, the positioner responds differently in automatic
mode (AUTO) .
Control over FOUNDATION™ eldbus is performed over the AO Function Block (control
valve) and over the DO1 Function Block (on/off valve). The application type can be entered
in the Resource Block over the SELECT_DO_1 parameter or at the positioner using Code
49-h0.
Control valve Open/close (on/off) valve
AUTO mode The positioner uses the set point to
position the valve. The valve position
(current position) appears in % on the
display.
Discrete analysis of the set point The
valve position (current position) in %
and O/C (Open/Close) appear in
alternating sequence on the display.
MAN mode The positioner follows the set point given over local operation.
−Depending on the application type, certain diagnostic functions cannot be performed or
analyzed (u EB8389 on EXPERTplus valve diagnostics).
−In manual mode, an on/off valve can be moved past 100% of the nominal range (with the
closed position for AIR TO OPEN) or below 0% of the nominal range (with the closed posi-
tion for AIR TO CLOSE).
Note

KH 8384-5 EN 11
Design and principle of operation
2.2 Additional equipment
Solenoid valve
If the operating voltage for the solenoid valve (12) fails, the supply pressure for the i/p con-
verter is vented to the atmosphere. The positioner can no longer operate and the control
valve moves to the fail-safe position determined by the actuator, regardless of the set point.
The manual set point is also reset to 0 % after the solenoid valve is activated!
A different manual set point must be entered again (Code 1).
Inductive limit contact
In this version, the rotary shaft of the positioner carries an adjustable tag which actuates the
built-in proximity switch.
External position sensor
In this version, only the sensor is mounted to the control valve. The positioner is located sepa-
rately from the valve. The connection of x and y signals to the valve is established by cable
and piping for air (only without inductive limit contact).
Leakage sensor
By upgrading the positioner with a leakage sensor, it is possible to detect seat leakage when
the valve is in the closed position.
Binary inputs
Binary input BI1 (14)
As a standard feature, the positioner comes with a binary input used to signalize process in-
formation over the FOUNDATION™ eldbus network.
Binary input BI2 (15)
This binary input BI2 is optional. It is an active input which is powered by the positioner to
connect a oating contact. The switching state of the oating contact can be indicated over
the FOUNDATION™ eldbus network.
The binary inputs are congured in the DI Function Blocks.
NOTICE
!
Note

12 KH 8384-5 EN
FOUNDATION™eldbus block model
2.3 Conguration using TROVIS-VIEW
The positioner can be congured with SAMSON's TROVIS-VIEW Software.
The positioner has for this purpose a serial interface to allow the RS-232 or USB port of a
computer to be connected to it using an adapter cable.
The TROVIS-VIEW software enables the user to easily congure the positioner as well as view
process parameters online.
2.4 Communication
The positioner is controlled completely by digital signal transmission according to
FOUNDATION™ eldbus specication.
Data are transmitted over the bus using digital, bit-synchronous Manchester coding at a
Baud rate of 31.25kbit/s over twisted-pair wires according to IEC61158-2.
If complex functions are started in the positioner, which require a long calculation time or
lead to a large quantity of data being saved in the volatile memory of the positioner, the alert
'busy' is issued over the DD. This alert is not an error message and can be simply conrmed.
3 FOUNDATION™ eldbus block model
All the functions and data of the positioner are assigned to various block types in
FOUNDATION™ eldbus. Each block type covers a different range of tasks. In the SAMSON
Type3730-5 Positioner, the following block types are implemented:
Note

KH 8384-5 EN 13
Initialization and zero calibration of the positioner
Resource Block (RES)
The Resource Block (RES) describes characteristics of the eldbus device, such as the device
name, manufacturer number and serial number. There is only one Resource Block in a de-
vice.
Function Blocks (FB)
Function Blocks are responsible for the way a FOUNDATION™ eldbus device works. A
FOUNDATION™ eldbus application can be congured by linking the input and output
parameters of Function Blocks.
The Type3730-5 Positioner includes the following Function Blocks:
−1x Analog Output Function Blocks (AOFB); execution time: 30ms
−1x Analog Input Function Blocks (AIFB); execution time: 30ms
−2x Discrete Output Function Blocks (DO FB); execution time: 30ms
−2x Discrete Input Function Blocks (DI FB); execution time: 20ms
−1x Proportional Integral Derivative Function Block (PID); execution time: 40ms
Transducer Blocks (TRD)
Each AI or AO Function Block has a Transducer Block which contains all data and de-
vice-specic parameters to link the device to the process value (sensor or nal control ele-
ment).
The following Transducer Blocks (corresponding to the Function Blocks) are implemented:
−1x Advanced Positioner Transducer Block (AO TRD)
−1x Analog Input Transducer Block (AI TRD)
−2x Discrete Output Transducer Blocks (DO TRD)
−2x Discrete Input Transducer Blocks (DI TRD)
4 Initialization and zero calibration of the positioner
Both an initialization and a zero calibration can be started over the XD_COMMAND param-
eter of the AO Transducer Block. The relevant parameters for a MAX/NOM initialization and
the diagnostic functions of EXPERTplus are listed below (u EB8389).
−APPLICATION_TYPE_OC_CONTROL (application type)
−INIT_METHOD (initialization method)

14 KH 8384-5 EN
Resetting the positioner
−TRANS_PIN_POS (follower pin position)
−RATED_TRAVEL (required rated travel for NOM initialization)
−PRESSURE_LIMIT (pressure limit setting)
−SELECT_EMERGENCY_MODE (E (setting when the travel sensor is defective)
−DEVICE_CHARACTERISTIC (C (settings for actuator and other accessories)
MODEL (actuator with or without spring-return mechanism)
BOOSTER (pneumatic volume booster)
STUFFING_BOX (packing to seal the plug stem to the atmosphere)
XD_COMMAND ("Start Initialization“)
XD_COMMAND_STATE (initialization status)
Read the corresponding section on starting up the positioner in the Mounting and Operating
Instructions u EB8384-5.
5 Resetting the positioner
The start-up and diagnostic data (in Code 36 Std) can be reset over the XD_COMMAND
(41) parameter of the AO Transducer Block.
The device data are reset and the function blocks connected to the values given in the
FOUNDATION™ eldbus specication using the DEFAULTS value in the RESTART (16)
parameter of the Resource Block (RES).
A warm start of the positioner is performed using the PROCESSOR value in the RESTART (16)
parameter of the Resource Block (RES).
The entire diagnostic data as well as the individual messages and histograms are reset over
the RESET_STATUS_MESSAGE_DIAG (147) parameter of the AO Transducer Block.
Note

KH 8384-5 EN 15
Status classication and condensed state
6 Status classication and condensed state
All status messages are classied in the positioner to report an error that has occurred. The
status classication can be changed over the DIAG_CLS parameter.
To provide a better overview, the classied messages are summarized in a condensed state
(CONDENSED_STATE (81) in the Resource Block). Besides the CONDENSED_STATE parame-
ter, the condensed state can be issued to the discrete output OUT_D of the DI Function Blocks
(DI1 + DI2).
Possible condensed states include:
0 OK
1 Maintenance required The positioner still performs its control task (with restrictions). A
maintenance demand or above average wear has been determined.
The wear tolerance will soon be exhausted or is reducing at a faster
rate than expected. Maintenance is necessary in the medium term.
2 Maintenance
demanded
The positioner still performs its control task (with restrictions). A
maintenance demand or above average wear has been determined.
The wear tolerance will soon be exhausted or is reducing at a faster
rate than expected. Maintenance is necessary in the short term.
3 Maintenance alarm The positioner cannot perform its control task due to a functional fault
in the positioner itself or in one of its peripherals or an initialization has
not yet been successfully completed.
7 Function check Test or calibration procedures are performed in the positioner. The
positioner is temporarily unable to perform its control task as long as
the procedure is taking place.
7 Block model
Several parameters can only be changed in certain modes (see Read/write capability in the
parameter description). In this case, not the actual mode is decisive, but the target mode.
7.1 Resource Block (RES)
The Resource Block contains all the data that identify the device. It is similar to an electronic
device tag. Resource Block parameters include device type, device name, manufacturer ID,
serial number as well as parameters that affect the behavior of all other blocks of the device.

16 KH 8384-5 EN
Block model
See page 27 for parameter list.
All time specications in the Resource Block are specied in the unit of 1/32ms according to
the FOUNDATION™ eldbus Specication Version 1.7.
In the Device Description Library supplied by Fieldbus FOUNDATION™ upon which the device
description of Type3730-5 is also based, these parameters are incorrectly specied as the
unit of ms. The specied values supplied by the device are, however, always to be interpreted
as the unit of 1/32ms.
7.2 Transducer Blocks
Transducer Blocks link the function blocks to the input and output variables of a eld device.
For example, the DI Function Blocks are linked to the physical binary inputs, an internal sole-
noid valve, the current valve position or the condensed state of the positioner. This link to the
various Transducer Blocks is made over the CHANNEL parameter of the individual function
blocks. The table below shows how CHANNEL is assigned to the function block:
CHANNEL Function block
1AO
2 AI
3 DI1
4 DI2
5 DO1
6 DO2
The Transducer Blocks DI TRD and DO TRD are implemented according to the
FOUNDATION™ eldbus specication and do not contain any manufacturer-specic
parameters.
Note

KH 8384-5 EN 17
Block model
7.3 Advanced Positioner Transducer Block (AO TRD)
The Advanced Positioner Transducer Block (AO TRD) contains an output value from an up-
stream Analog Output Function Block. This value is used to position a control valve. The block
contains parameters to adapt the positioner to the actuator and valve as well as for valve
start-up and diagnostics.
Action on fault detection
The action on fault detection for the "Maintenance alarm" state in the condensed state can be
congured in the XD_FSTATE_OPT parameter as follows:
−Hold last value
−Move to fail-safe position
−Move to fault state value XD_FSTATE_VAL
The action on fault detection to transfer to the O/S mode can be congured in the XD_OOS_
OPT parameter as follows:
−Hold last value
−Move to fail-safe position
−Move to fault state value XD_FSTATE_VAL
The AO Transducer Block (AO TRD) can still set an output error in the AO Function Block. For
this purpose, the following events to activate an output error can be congured in the
ALARM_OPTION parameter.
−No (never)
−Local Override (when the AO TRD is in the LOCAL OVERRIDE mode, i.e. the positioner is
set locally in the SAFE mode or an internal solenoid valve is activated)
−MAN (when the AO TRD is in MAN mode)
−Block alarm (when the AO TRD has a MAINTENANCE NOW block error)
−AO TRD fault state (when the action on fault detection is active)
−AO O/S set fault state (when the AO Function Block in the O/S mode, the valve is
moved to the FSTATE_VAL of the AO Function Block)

18 KH 8384-5 EN
Block model
Parameter description (Fig.5)
Control valve
FINAL_VALUE Set point of upstream AO Function Block (control valve)
FINAL_POS_VALUE Valve position after rescaling
WORKING_SP Set point after scaling, characterization, end position function
(corresponds to the controlled variable of the control algorithm)
WORKING_POS Actual valve position
READBACK_SELECT Select parameter which is issued to READBACK of the AO Function
Block
On/off valve
FINAL_VALUE_D Discrete set point of upstream DO Function Block
FINAL_POS_VALUE_D Discrete valve position after taking the direction of action into account
WORKING_SP_D Set point after taking the direction of action into account (corresponds
to the set point of the control algorithm)
WORKING_POS_D Actual discrete valve position
See page 43 for parameter list.
7.4 Function blocks
7.4.1 Analog Output Function Block (AOFB)
The AO Function Block processes an analog signal from an upstream block (e.g. PID Function
Block) to an output value that can be used for the downstream Transducer Block (e.g. valve
positioner). It contains scaling functions and ramp functions as well as other functions. The
generated OUT value is forwarded over CHANNEL to the downstream Transducer Block.
The AO Function Block contains its set point SP depending on the mode (MODE_BLK)
−Manually entered SP (AUTO)
−Directly from an upstream function block (CAS_IN)
−Directly from a eldbus host system (RCAS_IN)
An internal working process value PV is generated from SP, while taking into account:

KH 8384-5 EN 19
Block model
MODE=AUTO
SetFailSafePos
AO FB
CAS_IN
READBACK
MODE
Control valve
Scaling
FVR FINAL_VALUE SIGNAL_ACTION Characteristic
End position function
Characteristic
End position function
MODE=AUTO MODE
Open/close (on/off) FINAL_VALUE_D SIGNAL_ACTION
FINAL_POS_VALUE_D SIGNAL_ACTION
WORKING_SP_D WORKING_SP
WORKING_POS_D
FINAL_POS_VALUE
RB_SELECT
SIGNAL_ACTION
WORKING_POS
DO FB
OUT_D
DI FB
OUT_D
Discrete valve position 1 Valve closed 2 Valve open 3 Intermediate position
Fig.5: Advanced Positioner Transducer Block (AO TRD)

20 KH 8384-5 EN
Block model
−SP_HI_LIM (upper set point limit)
−SP_LO_LIM (lower set point limit)
−SP_RATE_DN (set point downward rate limit in AUTO mode)
−SP_RATE_UP (set point upward rate limit in AUTO mode)
−PV_SCALE (range of the process variable (PV) (start, end, unit and decimal point))
The OUT value is generated, while taking into account:
−XD_SCALE (range of the OUT value (start, end, unit and decimal point))
−IO_OPTS (determines the input/output action of the AO TRD, e.g. action on fault detec-
tion)
Action on fault detection
Action on fault detection taken during a communication fault (BAD status)
−The last valid value is used by default.
−By selecting FAULT STATE TO VALUE in the IO_OPTS parameter, the valve moves to the
fault state value FSTATE_VAL congured in the AO Function Block.
−FSTATE_TIME denes the length of time that the AO Function Block will wait to activate
the fault state.
Action on fault detection in OUT OF SERVICE (O/S) mode
−After the AO Function Block has moved to O/S mode, the last valid output value is kept
by default.
−By selecting "AO O/S set fault state" in the ALARM_OPTION parameter of AO TRD, the
valve moves to the fault state value FSTATE_VAL congured in the AO Function Block.
−FSTATE_TIME denes the length of time that the AO Function Block will wait to activate
the fault state.
See page 83 for parameter list.