Samson TROVIS SAFE 3731 Series Operating Instructions Manual
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Samson TROVIS SAFE 3731 Series Operating Instructions Manual

Samson TROVIS SAFE 3731 Series Operating Instructions Manual

Electropneumatic positioner
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Series 3731
TROVIS SAFE 3731-3 Electropneumatic
Positioner
EXPERTplus Valve Diagnostics
Operating Instructions
EB 8389S EN
Firmware version 1.6x
Edition May 2015

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Summary of Contents for Samson TROVIS SAFE 3731 Series

  • Page 1 Series 3731 TROVIS SAFE 3731-3 Electropneumatic Positioner EXPERTplus Valve Diagnostics Operating Instructions EB 8389S EN Firmware version 1.6x Edition May 2015...
  • Page 2 Definition of signal words DANGER! NOTICE Hazardous situations which, if not Property damage message or mal- avoided, will result in death or seri- function ous injury Note:  WARNING! Additional information Hazardous situations which, if not avoided, could result in death or se- Tip: rious injury Recommended action...

  • Page 3: Table Of Contents

    Contents Description ....................7 General ......................7 Start-up ......................9 Diagnostic functions ..................10 1.2.1 Reference tests .....................10 1.3.1 Application type ..................11 1.3.2 Analysis ......................11 Monitoring ....................14 Status messages ...................14 2.1.1 Resetting status messages ................15 Condensed state ..................18 2.2.1 Condensed at the fault alarm output ..............18 Logging .......................18 Statistical information ..................19 Open/close (on/off) valve ................21...
  • Page 4 Contents 3.7.1 Analysis and monitoring ................47 3.7.2 Resetting single status messages ..............47 Trend of travel end position ................51 3.8.1 Analysis and monitoring ................52 3.8.2 Resetting single status messages ..............53 Tests ......................53 Drive signal diagram steady-state ..............55 4.1.1 Analysis and monitoring ................56 4.1.2 Resetting single status messages ..............57 Drive signal diagram hysteresis ..............59...
  • Page 5 EB 8389S EN...
  • Page 6 Overview On/off service Throttling service No configuration Configuration No configuration Configuration required for required for required for required for monitoring diagnosis monitoring diagnosis Travel histogram Data logger Travel On/off diagnosis histogram Section 3.3 Section 3.2 Section 3.1 Section 3.3 Set point Stuffing box Data logger deviation...

  • Page 7: Description

    TROVIS-VIEW software (version 3 or 4) or DD/DTM/eDD. − TROVIS-VIEW 3 and 4 · Operator inter- face used to configure various SAMSON devices and define parameters (current version is TROVIS-VIEW 4) − DTM · Device type manager to describe...
  • Page 8 Description – Start-up Initialization mode â â â â Initialization with reference test ß à Subsequent initialization â Operating mode = â â Zero Reference of drive signal diagram Reference of drive signal diagram steady-state (d1) steady-state (d1) Reference of drive signal diagram Reference of drive signal diagram hysteresis (d2) hysteresis (d2)

  • Page 9: Start-Up

    Description 1.2 Start-up time can be adapted accordingly. Increment the derivative-action time until the desired The positioner must be initialized to use the behavior is reached. When the maximum full scope of the valve diagnostics. During value of 4 is reached for the derivative-ac- initialization the positioner adapts itself opti- tion time, the proportional-action coefficient mally to the friction conditions and the signal...

  • Page 10: Diagnostic Functions

    Description 1.2.1 Reference tests − in the positioner. If the 'Initializa- tion with reference test' parameter The monitoring of friction, supply pressure, is activated, an incorrect reference leakage (pneumatics and to the atmosphere), test is also indicated in Code 81. zero point and actuator springs requires ad- −...

  • Page 11: Application Type

    Description 1.3.1 Application type 2. Tests (out-of-service diagnostics) Similar to the statistical information func- Different diagnostic functions are available tion, data are compiled, saved and ana- depending on the application type selected lyzed by the positioner. However, in this in EXPERTplus. case, the valve position is not determined Depending on the application type selected, by the set point, but by the active test.
  • Page 12 Description Table 1: Diagnostic functions and test analysis Open/Close Control (on/off) Diagnostic functions valve valve Analysis See section Statistical information Breakaway time Open/Close – • Transit time 3.1, page 21 Valve end position Depending on trigger status Data logger • • 3.2, page 25 selected Shifting working range...
  • Page 13 Description Open/Close Control (on/off) Diagnostic functions valve valve Analysis See section Tests Air supply Drive signal diagram steady- • • Leakage pneumatics 4.1, page 55 state Actuator springs Drive signal dia- • • Friction 4.2, page 59 gram hysteresis Static character- •...

  • Page 14: Monitoring

    Monitoring 2 Monitoring setting the diagnosis contained in the Di- agnosis folder (> Status messages) 2.1 Status messages Extended status messages The extended status messages are generated The valve diagnostics integrated into the po- from the results gained from Statistical infor- sitioner generate classified status messages.

  • Page 15: Resetting Status Messages

    Monitoring 2.1.1 Resetting status The following classifications are possible: messages − No message If an event is classified as “No message”, When a status message is generated, you this event does not have any affect on the should first locate the source of the fault and condensed state.
  • Page 16 Monitoring Resetting the diagnosis NOTICE Code 36 - Diag Before mounting the positioner on a − Data from Statistical information and new control valve, perform a reset by Tests are reset according to Table 3. activating Code 36 - Std and re-ini- tialize the positioner.
  • Page 17 Monitoring Table 2: Reset functions All adjusted parameters and recorded measured values of the specified diagnostic test are reset, if not listed separately. Resetting Code Code single status 36 - Diag 36 - Std Function messages Operating hours counter Device switched on since (last) initialization Device in closed loop since initialization Status classification Logging...

  • Page 18: Condensed State

    Monitoring 2.2 Condensed state 1. Condensed state 'Maintenance alarm' is activated. To provide a better overview on the condi- 2. Condensed state 'Function check' is acti- tion of the valve assembly, all status messag- vated and the fault alarm output is acti- es are summarized in a condensed state vated.

  • Page 19: Statistical Information

    Statistical information 3 Statistical information Settings > Positioner > Error control − Logging of int. solenoid valve: [Yes], No The positioner records the set point w, valve position x, drive signal y and set point devi- − Min. clearance new logging int. solenoid valve: 0 to 5000 s, [300 s] ation e even while the process is running to obtain information on the valve, actuator...
  • Page 20 Statistical information – Open/Close diagnosis Prerequisite: – Application type: Open/Close â Operating point, Limit fail-safe position, Limit operating point â Limit value time analysis Limit value travel analysis Define parameters for partial stroke test, see Section 4.4 Status classification (NE 107) On/off status activated â...

  • Page 21: Open/Close (On/Off) Valve

    Statistical information 3.1 Open/close (on/off) valve x [%] w [%] The travel range of open/close (on/off) is Operating point defined by the fail-safe position and the op- erating point. As a result, the following pa- Limit operating point rameters to determine the working range and set point range are not analyzed and cannot be changed.

  • Page 22: On/Off Diagnosis

    Statistical information 3.1.1 On/off diagnosis 'Tolerance limit of step response' for the partial stroke test to start. 3730-2 3730-3 3731-3 3730-4 3730-5 After the partial stroke test is completed, the • • • • valve moves back to its last position (fail-safe position or operating point).

  • Page 23: Analysis And Monitoring

    Statistical information 3.1.2 Analysis and monitoring amount entered in 'Limit value travel analysis'. x [%] − The current 'Valve end position (falling)' w [%] differs from the reference value by the Valve end position (rising) amount entered in 'Limit value travel analysis'.
  • Page 24 Statistical information – Data logger Selection â â â Permanent Triggered â â Scan rate Trigger status Start trigger via â Start (software) â â â â â Con- w or densed w, x, e, y SV/FV state â â â...

  • Page 25: Data Logger

    Statistical information 3.2 Data logger 3.2.1 Permanent data logging The data logger records the measured vari- The measured variables are logged at the ables (valve position x, set point w, set point rate defined in 'Scan rate' and saved in a deviation e and drive signal y).

  • Page 26: Triggered Data Logging

    Statistical information The 'Test information' status indicates Defining parameters 'Test active'. 1. Select 'Trigger' (Selection). Diagnosis > Statistical information > Data 2. Select the triggering event. logger 3. Enter scan rate. − Selection: [Permanent] 4. Start data logger. 2. − Scan rate: 0.2 to 3600.0 s, [1.0 s] The 'Test information' status indicates 3.
  • Page 27 Statistical information The conditions for starting a trigger event 3.2.2.2 Triggered by set point, are met when the value exceeds the limit valve position, drive signal ('Trigger value' + ½ 'Trigger band'). or set point deviation 'Trigger edge' = Band exit The measured values are included in the trig- gered data logging when the conditions for w, x, y, e...
  • Page 28 Statistical information limit ('Trigger value' – ½ 'Trigger band') or 3.2.2.3 Triggered by internal sole- falls below the upper limit ('Trigger value' + noid valve/forced venting ½ 'Trigger band'). Triggering by the internal solenoid valve/ This function is only active when 'Trigger forced venting is only active when an inter- band' ≠...
  • Page 29 Statistical information lenoid valve/forced venting' or 'Start trigger 4. − Start data logger via set point' are met. Diagnosis > Data logger − Selection: Trigger 2. − Trigger status: Start trigger via set point/int. sol. valve/ forced venting − Trigger value: 0.0 to 100.0 %, [99.0 %] −...

  • Page 30: Travel Histogram

    Statistical information 3.3 Travel histogram The positioner saves the valve positions in a circular buffer, which holds 100 measured The valve travel histogram is a statistical values at one time. analysis of the plotted valve positions. It pro- vides information about the range in which Note: ...

  • Page 31: Analysis And Monitoring

    Statistical information 3.3.1 Analysis and monitoring Diagnosis > Status messages > Extended − Shifting working range: Analysis of the histogram for control valves − Working range: starts one hour after the observation period begins. No analysis is performed for on/off valves.

  • Page 32: Resetting Single Status Messages

    Statistical information 3.3.2 Resetting single status messages The 'Working range' and the 'Shifting work- ing range' messages can be reset by select- ing and executing the command "Reset 'Travel histogram x". This command resets all diagnostic parameters and measured data of the histogram and the short-term monitor- ing.

  • Page 33: Set Point Deviation Histogram

    Statistical information 3.4 Set point deviation histo- tioner records the set point deviation accord- ing to the adjusted 'Scan rate short-term his- gram togram' and analyses the last 100 measured The set point deviation histogram contains a values. statistical analysis of any set point deviations −...

  • Page 34: Analysis And Monitoring

    Statistical information ates the 'Limit working range' and 'Inner − Perhaps range limit: leakage' messages with the selected status classifications. Inner (seat) leakage If almost all set point deviations during the − Perhaps existing: short-term monitoring are greater than 1 % or smaller than –1 %, this may indicated that the actuator or valve stem is jammed.

  • Page 35: Resetting Single Status Messages

    Statistical information 3.4.2 Resetting single status messages The 'Inner leakage' and 'Limit working range' messages can be reset by selecting and executing the command "Reset 'Set point deviation histogram e" or "Reset 'Set point deviation histogram e - short-term". The 'Connection positioner-valve' message can be reset by selecting and executing the command 'Set point deviation histogram e - short-term".
  • Page 36 Statistical information – Cycle counter histogram Stem seal â â â â â Self-adjusting Adjustable Other, -/- Bellows seal â Max. cycle counter limit â â â â â Status classification (NE 107) Status classification (NE 107) External leakage perhaps soon External leakage perhaps soon expected expected...

  • Page 37: Cycle Counter Histogram

    Statistical information 3.5 Cycle counter histogram The cycle spans or cycle heights are as- signed to classes. The distribution showing The cycle counter histogram provides a sta- how often the cycle span or height occurred tistical analysis of the cycles. As a result, the within a class is shown in a bar graph.

  • Page 38: Analysis And Monitoring

    Statistical information 3.5.1 Analysis and monitoring − The 'Average value e short' contains the average class assignment of cycle Analysis of the histogram starts directly af- heights for the last 100 measured values. ter the change to manual or automatic Defining parameters mode.

  • Page 39: Resetting Single Status Messages

    Statistical information 3.5.2 Resetting single status messages The 'External leakage' message can be reset by selecting and executing the command "Reset 'Cycle counter histogram". By selecting and executing the "Reset 'Cycle counter histogram" command, all diagnostic parameters and measured data of the histo- gram and the short-term monitoring as well as the 'Dynamic stress factor' are reset.
  • Page 40 Statistical information – Drive signal diagram steady-state Requirements: – Model: Single acting – Booster: Not present – Application type: Control valve – Reference test completed. See Section 1.2.1 â Status classification (NE 107) Actuator Leakage Air supply springs pneumatics Working at full Perhaps too large/ Perhaps modified/ capacity...

  • Page 41: Drive Signal Diagram Steady-State

    Statistical information 3.6 Drive signal diagram Data are recorded in the background re- gardless of the operating mode selected. Da- steady-state ta logging does not need to be activated. The 'Drive signal diagram steady-state' re- The positioner records the valve position x cords the drive signal y in relation to the and its associated drive signal y in closed- valve position x.

  • Page 42: Analysis And Monitoring

    Statistical information Settings > Identification > Positioner > Note:  Actuator − Reference values are used in cases − Model: Single acting, [-/-] where no data could be compiled − Booster: Not present, [-/-] for valve positions x as the valve did not move to those positions or a Start-up steady state could not be reached.

  • Page 43: Resetting Single Status Messages

    Statistical information The following effects can be read by com- Note:  paring the correlation between the drive sig- The results from the Statistical infor- nal and valve position measured during op- mation test can be checked by per- eration and in the reference graph: forming a test from Tests (out-of-ser- −...
  • Page 44 Statistical information – Drive signal diagram hysteresis Requirements – Model: Single acting – Booster: Not present – Application type: Control valve – Reference test completed. See Section 1.2.1 â Enable time distance â â Immediately User-defined â Min. time distance from test â...

  • Page 45: Drive Signal Diagram Hysteresis

    Statistical information 3.7 Drive signal diagram hys- The following listed parameters are activated while the hysteresis test is being performed: teresis − Travel/angle range start (Code 8): 0 % The 'Drive signal diagram hysteresis' records − Travel/angle range end (Code 9): 100 % the change in drive signal ∆y in relation to −...
  • Page 46 Statistical information Requirements Based on the operating point, the test is per- formed with a change in travel of less than 1. A single-acting actuator is mounted on 1 % to find the change in drive signal (∆y). the valve. The changes in drive signal ∆y are classified 2.

  • Page 47: Analysis And Monitoring

    Statistical information waiting 60 seconds using the new oper- − Much higher over section: ating point. The test is started again ten times at the − Much lower over section: maximum. The time between tests is in- creased by 30 seconds each time (30 s x Diagnosis >...
  • Page 48 Statistical information short-term", the measured data in the Short- term folder are reset. Diagnosis > Status messages > Reset − Reset 'Drive signal diagram hysteresis' − Reset 'Drive signal diagram hysteresis - short- term' EB 8389S EN...
  • Page 50 Statistical information – Trend of travel end position Prerequisite - Enable set point cutoff decrease: On â Threshold value for recording data, zero point limit â Alarm settings (NE 107) Observing end position x [%] t [s] Reference test completed? Section 1.2.1 ß...

  • Page 51: Trend Of Travel End Position

    Statistical information 3.8 Trend of travel end position ing data' from the last value, the data of the new zero point are saved. The travel end position trend is used to detect A graph of the recorded valve positions at an alternating zero point or a creeping zero the lower end position is plotted over the point shift due to seat and plug wear or dirt...

  • Page 52: Analysis And Monitoring

    Statistical information 3.8.1 Analysis and monitoring Defining parameters 1. Activate tight-closing function. Analysis of the histogram starts directly af- 2. Set conditions for saving reference value ter the change to manual or automatic and zero point. See Section 3.8.1. mode. 3.

  • Page 53: Resetting Single Status Messages

    Tests 3.8.2 Resetting single status − Travel/angle range start (Code 8): 0 % − Travel/angle range end (Code 9): 100 % messages − Enable travel/angle lower limit The 'Observing end position' message and (Code 10): Off the measured data of the end position trend −...
  • Page 54 Tests – Drive signal diagram steady-state Requirements – Model: Single acting – Booster: Not present – Target mode: Manual â Status classification (NE 107) Actuator Leakage Air supply springs pneumatics â Start test NO à Reference test completed? Section 1.2.1 u ...

  • Page 55: Drive Signal Diagram Steady-State

    Tests 4.1 Drive signal diagram The recorded data of the drive signal y are plotted versus the valve position x in a graph steady-state (Repetition). The 'Drive signal diagram steady-state' Requirements (Tests) allows you to check the results of the 1.

  • Page 56: Analysis And Monitoring

    Tests Settings > Identification > Positioner > − Perhaps bias reduced (TEST): Actuator − Model: Single acting, [-/-] − Working at full capacity (TEST): 2. − Booster: Not present, [-/-] 3. Start test Defining parameters 1. Switch to manual mode. Note: ...

  • Page 57: Resetting Single Status Messages

    Tests 4.1.2 Resetting single status − The drive signal runs below the reference as the gradient rises. messages − The drive signal starts to rise steadily at a The diagnostic parameters and measured certain valve opening compared to the data analysis from the 'Drive signal dia- reference graph.
  • Page 58 Tests > Drive signal diagram hysteresis Requirements – Model: Single acting – Booster: Not present – Target mode: Manual â Cancelation condition Tolerance band of hysteresis Status classification (NE 107) Friction â Start test â NO à Reference test complet- ed? See section 1.2.1.

  • Page 59: Drive Signal Diagram Hysteresis

    Tests 4.2 Drive signal diagram hys- corded data of the change in drive signal (∆y) are plotted versus the valve position x in teresis a graph. The 'Drive signal diagram hysteresis' (Tests) Requirements allows you to check the results of the drive 1.

  • Page 60: Analysis And Monitoring

    Tests Settings > Identification > Positioner > Note:  Actuator Cancel the test by right-clicking 'Stop − Model: Single acting, [-/-] test' and selecting 'Execute' or by 2. − Booster: Not present, [-/-] pressing the rotary pushbutton at the positioner. Defining parameters After the test has been canceled, the posi- 1.

  • Page 61: Resetting Single Status Messages

    Tests Number of tests repeated). After the tenth time that the test is canceled, the time entered in 'Min. time distance from test' is kept again. If the analysis of the hysteresis pinpoints 'Friction', the positioner generates a corre- sponding status message. Diagnosis >...

  • Page 62: Static Characteristic

    Tests 4.3 Static characteristic − 'Min. dead band': Minimum change in set point that causes a minimal change The static performance of the control valve is in the valve position. affected by the friction hysteresis and the − 'Average dead band': Average change elastic processes in the valve stem packing.

  • Page 63: Resetting Single Status Messages

    Tests The 'Test information' status indicates 'Test active'. 'd3' and 'tEST' are indicated in alternating sequence on the positioner display. 'Function check' is activated as the condensed state. Operation > Operating mode − Target mode (Code 0): Manual Diagnosis > Tests > Static characteristic −...
  • Page 64 Tests – Partial stroke test (PST) Step response settings: Step start, Step end, Tolerance limit of step response, Settling time before test start, Delay time after step, Scan rate, Number of step responses Activation of the ramp function â â â...

  • Page 65: Partial Stroke Test (Pst)

    Tests 4.4 Partial stroke test (PST) Recording the test results additionally allows an analysis of the dynamic control response. The partial stroke test (PST) is particularly The partial stroke test can be performed suitable for the status-oriented detection of once (test immediately started) or, with an malfunctions in pneumatic shut-off valves.
  • Page 66 Tests − Required transit time OPEN (Code 21): erating point ± 'Tolerance limit of step re- Variable sponse' for the partial stroke test to start. − Required transit time CLOSED (Code 22): After being activated, the test does not start Variable until the 'Settling time before test start' has elapsed.
  • Page 67 Tests The ‘Scan rate’ defines the time interval be- itoring value'. The 'delta y-monitoring tween which the measured values are re- value' is entered in % and is based on corded during the test. the entire drive signal range (10000 This cancelation condition only becomes Test cancelation conditions effective after it has been activated ('Ac-...
  • Page 68 Tests ating point ± 'Tolerance limit of step re- The 'Test information' status indicates sponse'. 'Test active'. 'd4' and 'tEST' are indicated in alternating sequence on the positioner − 'Reference variable was changed': The display. 'Function check' is activated test was started according to a schedule as the condensed state.
  • Page 69 Tests positioner remains in selected mode. − delta y-monitoring value (Code 49 - A9): The 'Status of partial stroke test' 0 to 100 %, [0 %] reading indicates 'Not successful'. − Activation PST tolerance band control (Code 49 - E5): Yes, [No] In TROVIS-VIEW the test information and −...

  • Page 70: Start Triggered By The Set Point

    Tests 4.4.1 Start triggered by the safe reference value' ± 'Tolerance limit of step response'. set point Settings > Positioner > Options The partial stroke test of on/off valves is trig- − Action at active binary input: gered when the set point w moves in the Start partial stroke test (PST) range between 25 and 50 % of the travel −...

  • Page 71: Resetting Single Status Messages

    Tests − 'Rise time' [s] Note:  − 'Settling time' [s] The 'No test available' status remains Analysis of measured data (ramp test): active until a partial stroke test is completed successfully. − 'Overshoot' (relative to the step height) The results of the first partial stroke test are 4.4.4 Resetting single status used as the reference measurement.
  • Page 72 Tests Table 4: Start options for the partial stroke test (PST) PST start Rotary pushbut- ton or operating Test interval software (time-controlled) Set point w Binary input See page 65 See page 65 See section 4.4.1 See section 4.4.2 Operating mode Manual Automatic Automatic Automatic Automatic Not possible...
  • Page 73 EB 8389S EN...
  • Page 74 Statistical information – Full stroke test (PST) Prerequisite – Operating mode: Manual â Tolerance limit of step response, Settling time before test start, Delay time after step, Scan rate Activation of the ramp function â â â x [%] x [%] â...

  • Page 75: Full Stroke Test (Fst)

    Tests 4.5 Full stroke test (FST) The change in travel can be performed ei- ther in steps or in a ramp function (Fig. 15). The dynamic valve performance can be eval- For the test in a ramp function, additionally uated by performing the test. the times for the rising and falling ramps The full stroke test is started in the manual need to be defined.
  • Page 76 Tests The 'Tolerance limit of step response' param- − 'Max. test duration': The test is canceled eter defines the permitted valve positions for when the maximum permissible test du- the start value and the end value for the step. ration is reached. The 'Scan rate' defines the time interval be- Additionally, the full stroke test is canceled tween which the measured values are re-...
  • Page 77 Tests − Settling time before test start: Note:  1 to 240 s, [10 s] The 'Measured data storage out − Delay time after step: of memory' reading (Maintenance 2.0 to 100.0 s, [2.0 s] alarm) is generated when the 'Scan −...

  • Page 78: Analysis And Monitoring

    Tests mum transit time open' (Code 41) deter- results of the next following full stroke mined during initialization. test are used as the new reference measurement: − The 'Scan rate' must not be lower than − 'Activation of the ramp function' the indicated 'Min.
  • Page 79 Tests analysis of the penultimate test is deleted when another test is performed. Diagnosis > Status messages > Reset Reset FST EB 8389S EN...

  • Page 80: Dynamic Hart ® Variables

    Dynamic HART® variables 5 Dynamic HART variables ® The HART specification defines four dynam- ® ic variables consisting of a value and an en- gineering unit. These variables can be as- signed to device parameters as required. The universal HART command 3 reads the dy- ®...
  • Page 81 Dynamic HART® variables Table 5: Dynamic HART variables assignment ® Variable Meaning Unit Reference variable Reference variable Valve set point Valve set point Target position Target position Valve position Valve position Set point deviation e Set point deviation e Absolute total valve travel Absolute total valve travel –...

  • Page 82: Binary Input

    Binary input 6 Binary input − Reset diagnosis Active functions of statistical information The following description only applies to po- and tests are stopped and the diagnostic sitioners fitted with an optional binary input. data is reset once. The optional binary input can be used to ac- −...
  • Page 83 Binary input EB 8389S EN...

  • Page 84: Appendix

    Appendix 7 Appendix 7.1 Code list Code Parameter – Readings/ Description values [default setting] Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration. 48* d0 Current temperature Current operating temperature [°C] inside the positioner (accuracy ±3 %) –55.0 to 125.0 Read only...
  • Page 85 Appendix Code Parameter – Readings/ Description values [default setting] Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration. d8 EXPERTplus activation Firmware version 1.5x and higher without function 48* Diagnostic parameters h h0 Initialization with Initialization with reference test reference test (the reference graphs for drive signal y steady-state (d1) and drive...
  • Page 86 Appendix Code Parameter – Readings/ Description values [default setting] Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration. 49* A4 Status classification of Maintenance required PST status No message Maintenance demanded Maintenance alarm Out of specification Read only A5 Recommended min.
  • Page 87 Appendix Code Parameter – Readings/ Description values [default setting] Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration. 49* d3 Step end Stop value for step response 0.0 to 100.0 %, [90.0 %] d4 Activation of ramp Activates or deactivates ramp function.
  • Page 88 Appendix Code Parameter – Readings/ Description values [default setting] Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration. 49* E4 Unassigned E5 Activation PST toler- Activates or deactivates PST tolerance band monitoring. ance band control [No], YES E6 PST tolerance band The test is automatically canceled as soon as the Step end (Code 49...
  • Page 89 Appendix Code Parameter – Readings/ Description values [default setting] Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration. 49* h Application type (valve) h0 Application type Control valve Open/close (on/off) valve [No], YES, ESC Depending on the adjusted application type, the positioner responds differently in automatic mode and there are differences in the diag- nostic functions.
  • Page 90 Appendix Code Parameter – Readings/ Description values [default setting] Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration. 49* h9 Status classification for Maintenance required on/off No message Maintenance demanded Maintenance alarm Out of specification Read only EB 8389S EN...

  • Page 91: Error Messages And Recommended Corrective Action

    Appendix 7.2 Error messages and recommended corrective action Status clas- Message Possible reasons Recommended action sification Single reset Diagnosis > Status messages Control loop (Code 57) − Actuator is blocked. − Check attachment. • – − Positioner attachment has − Check supply pressure. shifted subsequently.
  • Page 92 Control calculation (Code Hardware error has occurred. Confirm error. If error can- • • not be confirmed, return po- sitioner to SAMSON for re- pair. Program load error − A program has been load- Interrupt current signal and – –...
  • Page 93 (Code 56) nominal range (NOM) or nominal range. substitute (SUB) initialization. − Re-initialize positioner. ATO/ATC switch defective. Return positioner to SAMSON for repair. No emergency mode Positioner detected during ini- For your information only. • – (Code 76) tialization that actuator per- No further action required.
  • Page 94 Adjustment (calibration) Error in data from production Return positioner to • – parameter (Code 70) calibration. SAMSON for repair. General parameters Error in parameters not criti- Confirm error. • • (Code 71) cal to control operation. Internal device error 1...
  • Page 95 Appendix Status clas- Message Possible reasons Recommended action sification Single reset Observing end position − Course of end position Check seat and plug. • • monotonically increasing/ Sec. 3.8.2 u  decreasing. − Course of end position al- ternates. Positioner-valve linkage −...
  • Page 96 Appendix Status clas- Message Possible reasons Recommended action sification Single reset Open/Close (on/off) − The breakaway time or − Check that pneumatic • • transit time differs from the installations and con- Sec. 3.1.3 u  reference value by the nections are tight. amount entered in 'Limit −...

  • Page 97: Diagnostic Parameters And Measured Data Saved In A Non-Volatile Memory

    Appendix 7.3 Diagnostic parameters and measured data saved in a non-volatile memory Data saved in a non-volatile memory: Saved directly after they change Saved cyclically every 24 h Statistical information Open/Close (on/off) 'Limit value time analysis', 'Limit value Assessment travel analysis'. Reference assessment Data logger 'Selection', 'Trigger status', 'Scan rate',...
  • Page 98 Appendix Data saved in a non-volatile memory: Saved directly after they change Saved cyclically every 24 h Partial stroke test (d4) 'PST testing mode', 'Step start', 'Step end', 'Tolerance limit of step response', 'Activation of the ramp function', 'Ramp time (rising)', 'Ramp time (fall- ing)', 'Settling time before test start', 'Delay time after step', 'Scan rate', 'Max.

  • Page 99: Determining The Ramp Times Of The Partial Stroke Test

    Appendix 7.4 Determining the ramp times of the partial stroke test Suitable ramp times for the partial stroke test can be determined by performing a full stroke test. NOTICE See section 4.5 on how to perform a full stroke test. 1. Adjust the FST diagnostic parameters as follows: 'Tolerance limit of step response' = 2.0 % (WE) 'Activation of the ramp function' = Yes (WE) 'Ramp time (rising)' = 900 s...
  • Page 100 Appendix Fig. 16: Full stroke test to determine the ramp times for the partial stroke test The valve position closely follows the set point in the example shown here EB 8389S EN...
  • Page 101 EB 8389S EN...
  • Page 102 EB 8389S EN...
  • Page 103 Abbreviations used Set point deviation Binary input Signal pressure Forced venting Supply pressure Solenoid valve Valve position Zero point Valve position when the valve is tightly shut Set point, reference variable EB 8389S EN...
  • Page 104 SAMSON AG · MESS- UND REGELTECHNIK Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 EB 8389S EN samson@samson.de · www.samson.de...

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Trovis safe 3731-3

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