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Samson foundation 3787, Mounting And Operating Instructions, Page: 23 / 96

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Samson foundation 3787 Mounting And Operating Instructions Download Page 23

Fig. 7 

⋅

Mounting a reversing amplifier

1.3 1.2

1.1

1

Output 38

Supply 9

A

1

1.5

1.6

Z

A

2

1.4

A

1

A

2

Output 38 Supply 9

1.3

1.2

1.1

1.6

Z

A

1

From the positioner

To the actuator

1

Reversing amplifier

1.1 Special screws
1.2 Gasket
1.3 Special nuts
1.4 Rubber seal
1.5 Plug
1.6 Filter

EB 8383-1 EN

23

Reversing amplifier for double-acting actuators

Summary of Contents for foundation 3787

Page 1: ...FOUNDATIONTM FIELDBUS Positioner Type 3787 Fig 1 Type 3787 Mounting and Operating Instructions EB 8383 1 EN Firmware R 1 42 K 1 40 Edition November 2004...

Page 2: ...cam disk 20 2 3 4 Reversing amplifier for double acting actuators 22 2 4 Fail safe action of the actuator 22 3 Connections 24 3 1 Pneumatic connections 24 3 1 1 Pressure gauge 24 3 1 2 Supply air pre...

Page 3: ...utput Function Block 57 Parameters of the Analog Output Function Block 59 7 4 3 2 PID Function Block PID controller 65 Parameters of the PID Function Block 67 7 5 Other parameters 78 7 5 1 Stale count...

Page 4: ...ds which could be caused by the process medium the operating pressure the signal pressure and moving parts of the control valve must be prevented by means of appropriate measures Should inadmissible m...

Page 5: ...h blocks in other devices at the same time In the previous version it was only possible to either interconnect function blocks within a device or with blocks in other devices An Output Failure in BLOC...

Page 6: ...ted travel angle Adjustable from 0 1 to 10 0 default 0 5 Resolution internal measurement 0 05 Transit time For valve transit time up to 240 s set point ramp for venting and supply air separately adjus...

Page 7: ...and plastic coated External parts Stainless steel 1 4571 and 1 4301 Weight Approx 1 3 kg Versions of the positioner Model 3787 X X X 0 X 3 X Explosion protection Without II 2 G EEx ia IIC T6 II 2 D I...

Page 8: ...NDA TIONTM Fieldbus The write protection switch 6 located on the inside of the cover prevents stored con figuration data from being overwritten Forced venting The positioner is controlled over a 6 to...

Page 9: ...ctional diagram e p 3 4 2 9 7 8 6 1 G C EN 61158 2 e p G Fieldbus Foundation 8 TROVIS VIEW 11 10 1 12 u 13 Forced venting Binary input Supply air Exhaust air Serial Interface 1 Inductive displacement...

Page 10: ...of protection IP 65 by preventing dirt and moisture from entering the device 2 1 Direct attachment to Type 3277 Actuator The necessary accessories are listed in the Tables 1 2 and 3 on page 13 When l...

Page 11: ...Internal signal pressure connection Signal pressure tube 1 2 Clamp D1 Lever D2 Lever 15 Distance plate 16 Cover 17 Seal 18 Cover plate 19 Switch plate Signal pressure bore Connection block Marking Mar...

Page 12: ...7 Mount the positioner so that the bore in the distance plate 15 is aligned with the seal located in the bore of the actua tor yoke 8 Align the switchover plate with the corresponding symbol for left...

Page 13: ...new switchover and connecting plates can only be used Old and new plates are not interchangeable Connection block required for 240 350 and 700 cm2 actuators including seals and fastening screw G 1 4...

Page 14: ...utput output 38 with a screw in throttle see Accessories table 2 2 1 Mounting sequence Refer to Tables 4 and 5 on page 16 for re quired mounting parts Note Prior to mounting the parts apply signal pre...

Page 15: ...30 Attachment to NAMUR rib Mounting position Attachment to rod 18 Lever N1 N2 19 Pin 20 Plate 21 Clamp 22 Clamping plate 23 Screw 24 Pointer 25 Shaft 26 Lever of positioner 27a Transmission pin 27b L...

Page 16: ...ith rod diameter in mm 20 to 25 N1 1400 6436 20 to 25 N2 1400 6437 25 to 30 N1 1400 6438 25 to 30 N2 1400 6439 30 to 35 N1 1400 6440 30 to 35 N2 1400 6441 Attachment to Fisher and Masoneilan linear ac...

Page 17: ...of rotation smaller than 90 and 0 to 120 recom mended for all angles of rotation larger than 90 Table 6 Rotary actuators Complete mounting parts but without cam disks SAMSON Type 3278 Actuator Attachm...

Page 18: ...1 Mounting the lever with feeler roll 1 Place lever with attached feeler roll 35 on the transmission lever 37 and secure it with the supplied screws 38 and washers 2 3 2 Mounting the intermediate pie...

Page 19: ...43 37 Attachment to SAMSON Type 3278 Attachment acc to VDI VDE 3845 33 Positioner 34 Intermediate piece 35 Lever with cam follower roll 36 Adapter 37 Transmission lever 38 Screws 39 Scale 40 Cam disk...

Page 20: ...e posi tion should never be below the 0 position In actuators with fail safe position valve OPEN the maximum signal pressure must be applied to the actuator prior to aligning the cam disk In springles...

Page 21: ...s counterclockwise Control valve opens clockwise Feeler roll Starting point Holes to secure the cam disk View onto the actuator shaft from the positioner Insert clip and then press tongues outwards EB...

Page 22: ...e hollowed special screws 1 1 into the connecting ports A1 and Z 3 Place the reversing amplifier onto the positioner and screw tight using both the special screws 1 1 4 Screw the supplied filter 1 6 u...

Page 23: ...A1 1 5 1 6 Z A2 1 4 A1 A2 Output 38 Supply 9 1 3 1 2 1 1 1 6 Z A1 From the positioner To the actuator 1 Reversing amplifier 1 1 Special screws 1 2 Gasket 1 3 Special nuts 1 4 Rubber seal 1 5 Plug 1 6...

Page 24: ...top or bottom diaphragm cham ber depending on the fail safe position ac tuator stem extends or retracts Exhaust air The exhaust air connection of the positioner is included in the mounting parts For d...

Page 25: ...nd the acci dent prevention regulations that apply in the country of use In Ger many these are the VDE regulations and the accident prevention regula tions of the employers liability insur ance associ...

Page 26: ...is connected over a large area to the gland and housing To connect the bus line loosen the coup ling nut and the clamping insert from the positioner and remove the dust cap Slide the coupling nut and...

Page 27: ...over the bus protocol Forced venting For the positioners with forced venting func tion a voltage between 6 and 24 V DC must be connected to the terminals 81 and 82 Note If there is no voltage connecte...

Page 28: ...sitioners that can be connected is reduced when they are used in hazardous areas Fig 10 FOUNDATIONTM Fieldbus connection for non hazardous areas top and for hazardous areas bottom 3787 3787 3787 3787...

Page 29: ...ntrol operation possible See table below for detailed description Description LED Device start up Red on No error detected Device connected to bus cold start completed initialization required Initiali...

Page 30: ...4 Default setting All parameters are set to default values See chapter 7 on description of parameters Note Manual operation and activated final posi tion functions can cause the actuator to filled wit...

Page 31: ...Maximum range only for three way valves Start initialization A successful initialization is indicated in the operating software and over the LEDs see chapter 4 1 Carry out the configuration suitable f...

Page 32: ...the position predetermined by the reference variable Note After the positioner has been initialized suc cessfully for the first time pressing the Init Zero key subsequently only starts a zero calibra...

Page 33: ...routine based on either the nominal range or maxi mum range by setting the parameter INIT_METHOD accordingly During initialization based on nominal range the following parameters must be set VALVE_TY...

Page 34: ...must be set to Good The position feedback can be retrieved via Current valve position FINAL_POSITION_VALUE 3 Set the Transducer Block to the Auto mode In the menu Positioner Operating mode TRD under R...

Page 35: ...e of 100 m If re quired the sieve can be unscrewed and cleaned Please also observe the maintenance instruc tions for upstream pressure reducing stations for supply air if applicable 6 Servicing explos...

Page 36: ...ation into the System Del taV from Fisher Rosemount instead of the capabilities file from Fieldbus Foundation This file can be provided by SAMSON 7 3 Notes on the parameters All times specified in the...

Page 37: ...the EEPROM The number of write accesses granted to the EEPROM is limited due to technical re strictions Writing of transducer block parameters is limited to 10 000 accesses For all other blocks the l...

Page 38: ...e specific parameters to link the device to the process data sensor or actuator One or more Function Blocks Function Blocks provide generally useable automation functions There are various different t...

Page 39: ...ON VALUE Transducer Block Pneumatik Block MODE_BLK SP _ OUT FINAL_VALUE_CUTOFF_LO FINAL_VALUE_CUTOFF_HI READBACK SP Set point ramps Sp_RATE_DN Sp_RATE_UP PV XD scaling XD_SCALE PV_SCALE high To outsid...

Page 40: ...lock DISC ALM Write protection has been changed BLOCK ALM Block alarm Note Additionally the process alarms can be cleared in this parameter group ALERT_KEY S Index 4 Access r w Input Default The ident...

Page 41: ...DD_RESOURCE S Index 9 Access r Shows the string for the Device Description in the device Note If there is not Device Description in the device null appears in the display DD_REV S Index 13 Access r Sh...

Page 42: ...ime in percent which is available to process additional function blocks Note This parameter is not supported as the function blocks of the Type 3787 are configured invariably FREE_SPACE D Index 24 Acc...

Page 43: ...e Resource Block AUTO O S The Resource Block supports the following modes AUTO In this mode the execution of the function blocks is AO and PID Function Blocks granted O S In this operating mode the ex...

Page 44: ...as elapsed the PID Block changes from ROUT mode to the mode selected in SHED_OPT 640000 1 32 ms SW_REVISION N Index 42 Access r Firmware version communication positioner STRATEGY S Index 3 Access r w...

Page 45: ...Enable clear write protection LOCKED NOT LOCKED WRITE_PRI S Index 39 Access r w Input Default Determines the handling when a write protection alarm is generated parameter WRITE_ALM 0 The write protec...

Page 46: ...for adaptation to actuator and valve for start up and for control valve diagnosis Parameters of the Standard Advanced Positioner Valve Transducer Block This Block contains parameters for descriptions...

Page 47: ...the positioner ACT_SN S Index 24 Access r w Serial number of the actuator associated with the positioner ACT_STROKE_TIME_DEC S Index 59 Access r Minimum transit time CLOSED position The minimum trans...

Page 48: ...ARY_INPUT D Index 41 Access r Display Status of the binary input NOT ACTIVE ACTIVE NOT EVALUATED BLOCK_ALARM D Index 8 Access r w Shows the current block status with information about configuration ha...

Page 49: ...transit time during initialization 1 240 s 10 s DEVIATION D Index 34 Access r Deviation of the positioner FINAL_VALUE N Index 13 Access r This parameter contains the correction value received from the...

Page 50: ...Input Default Describes whether and how the binary input is evaluated NOT EVALUATED ACTIVELY OPEN ACTIVELY CLOSED NOT EVALUATED IDENT_FORCED_VENTING N Index 43 Access r Display Describes whether the o...

Page 51: ...unctions such as initialization or zero calibration are activated as well as during on site operation of the device TROVIS VIEW the mode changes to LO After exiting this mode the mode changes to the p...

Page 52: ...IVATED FORCED VENTING OPTION ZERO ERROR SUCCESSFUL NO VALID DATA FROM APPLICATION SELF_CALIB_WARNING D Index 57 Access r Display Additional alert messages of the sequence started with SELF_CALIB_CMD U...

Page 53: ...r specific text of max 32 characters to clearly identify and assign the block No text TOL_OVERSHOOT S Index 36 Access r w Range Default Tolerated overshoot 0 1 10 0 5 TOLERANCE_BAND S Index 38 Access...

Page 54: ...ect with rotary actuators TRANSM_LENGTH S Index 52 Access r w Range Default Transmission length only for linear actuators with NAMUR attachment Lever length distance between travel pick off and pivot...

Page 55: ...es XD_CAL_LOC S Index 29 Access r w Location of last calibration XD_CAL_DATE S Index 30 Access r w Date of last calibration XD_CAL_WHO S Index 31 Access r w The person who carried out the last calibra...

Page 56: ...LIBRATION FAILED ZERO POINT ERROR INTERNAL CONTROL LOOP DISTURBED Reset over SELF_CALIB_CMD RESET CONTROL LOOP FAULT TRAVEL TIME EXCEEDED Automatic reset of control loop error message CHARACTERIZATION...

Page 57: ...4 3 1 Analog Output Function Block The Analog Output Function Block processes an analog signal received from an upstream connected block e g PID Block into a correction value that can be used for the...

Page 58: ...M SP SP_HI_LIM SP PV SP READBACK OUT XD_SCALE MODE_BLK OUT MODE_BLK manual SP e g in C e g in Set point ramps Sp_RATE_DN Sp_RATE_UP PV XD scaling XD_SCALE PV_SCALE XD PV scaling XD_SCALE PV_SCALE Set...

Page 59: ...e block mode is O S CONFIGURATION_ERROR INPUT FAILURE PV position feedback has BAD status e g because the Transducer Block is in O S mode OUTPUT FAILURE Correction value OUT cannot be issued e g becau...

Page 60: ...O or MAN mode This option has priority over SP_PV Track in MAN LO modes Increase to close Inversion of output value to the Transducer Block corresponds with the direction of action Fault State to valu...

Page 61: ...via CAS_IN The AO Block is executed OUT N Index 9 Access r w in MAN O S Shows the manipulated variable value limit and status of the AO Function Block Note If the MAN mode in MODE_BLK is selected the...

Page 62: ...ewise determined Uninitialized NormalShed_NormalReturn Changes to next possible mode after leaving the error condition returns to RCAS mode NormalShed_NoReturn Changes to next possible mode after leav...

Page 63: ...PV_SCALE this value should be adapted accordingly SP_LO_LIM S Index 21 Access r w Input Default Used to input the low limit of the set point reference variable Value and range of the PV_SCALE 10 0 No...

Page 64: ...or processed by the AO Function Block TAG_DESC S Index 2 Access r w Default For entering a user specific text of max 32 characters to clearly identify and assign the block No text UPDATE_EVT D Index 2...

Page 65: ...consists of a proportional an integral and a derivative component The manipulated variable is calculated from the set point value SP from the process variable PV actual value and from the system devia...

Page 66: ...e of a downstream connected output block to be activated The BYPASS parameter allows the internal set point to be directly transferred to the correc tion value Feedforward is possible over the FF_VAL...

Page 67: ...ions remain active as long as the measured value is within the hysteresis The hysteresis value has an effect on the following alarm limits of the PID Function Block HI_HI_LIM HI_LIM LO_LO_LIM LO_LIM D...

Page 68: ...iolation remains active as long as the value of the calculated manipulated variable does not exceed or fall below the hysteresis value again 0 50 0 5 BKCAL_IN N Index 27 Access r w Shows the analog in...

Page 69: ...rmine the automation strategy Bypass Enable Direct Acting Track Enable Track in Manual PV for BKCAL_OUT No OUT Limits in Manual None DV_HI_ALM D Index 64 Access r w Shows status of alarm for the high...

Page 70: ...V_LO_ALM is generated 3402823466 x 1038 DV_LO_PRI S Index 58 Access r w Input Default Determines the action to be taken when the low deviation alarm DV_LO_LIM is exceeded 0 The violation of the limit...

Page 71: ...out the alarm timing date time and the value which triggered the alarm Note The unit of the alarm status parameter is taken on by the PV_SCALE parameter Additionally the active alarm can be manually a...

Page 72: ...he status of the alarm for the low low alarm limit LO_LO_LIM including details about the alarm timing date time and the value which triggered the alarm Note The unit of the alarm status parameter is t...

Page 73: ...lock supports the following modes O S Out of Service The PID Algorithm of the Block is not executed The last value or the value determined during the active state fault is issued at the OUT parameter...

Page 74: ...over by the PV_SCALE parameter group PV_FTIME S Index 16 Access r w Default Used to input the filter time constant in seconds of the digital filter of first order This time is required to allow 63 of...

Page 75: ...the monitoring time has elapsed the PID Block changes from RCAS or ROUT mode to the mode selected here The action to be taken after the fault state is completed is likewise determined Uninitialized N...

Page 76: ...ge of the PV_SCALE 10 0 Note If the lower range setting is changed in PV_SCALE this value should be adapted accordingly SP_RATE_DN S Index 19 Access r w Default Used to input the ramp rate at which do...

Page 77: ...s data is not checked or processed by the PID Function Block TAG_DESC S Index 2 Access r w Default For entering a user specific text of max 32 characters to clearly identify and assign the block No te...

Page 78: ...valid when it has the status Good at the expected point in time The stale counter defines how many successive stale bad values are accepted until the fault state mechanism of the block is enabled Whe...

Page 79: ...t initialized The device has not been initialized Selfcalibration failed Initialization could not be successfully completed Exact details about the causes are sup plied by the SELF_CALIB_STATUS parame...

Page 80: ...2 Messages of the XD_ERROR parameter Transducer Block Unspecified Error The device has not been initialized or the total valve travel has been exceeded General Error No production calibration complete...

Page 81: ...SELF_CALIB_STATUS parameter Transducer Block Proportional band restricted too much Even the smallest permissible pulses still cause excessive changes in travel Initialization aborted Possible sources...

Page 82: ...150 164 27 75 56 50 86 46 28 5 28 5 Output 1 A1 Output 2 A2 Supply Z Output 38 Supply 9 M20 x1 5 Direct attachment Pneumatic connections G 1 4 or NPT 1 4 Attachment with intermediate piece for rotary...

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Page 96: ...SAMSON AG MESS UND REGELTECHNIK Weism llerstra e 3 60314 Frankfurt Germany Phone 49 69 4009 0 Fax 49 69 4009 1507 Internet http www samson de S Z 2004 11 EB 8383 1 EN...

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