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Download PROFIBUS Positioner Type 3785 - SAMSON Positioner Type 3785 PA device profile version 2.0 Mounting and Operating Instructions EB 8382-1 EN Firmware versionR 1.4x/K 1.6x EditionJuly

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  • PROFIBUS PositionerType 3785PA device profile version 2.0

    Mounting andOperating Instructions

    EB 8382-1 ENFirmware version R 1.4x/K 1.6xEdition July 2004

    Fig. 1 Type 3785 PROFIBUS Positioner

  • Contents Page

    1 Design and principle of operation . . . . . . . . . . . . . . . . . . . 81.1 Optional accessories . . . . . . . . . . . . . . . . . . . . . . . . . . 81.2 Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

    2 Attaching the positioner . . . . . . . . . . . . . . . . . . . . . . . . 102.1 Direct attachment to Type 3277 Actuator . . . . . . . . . . . . . . . . 102.2 Attachment according to IEC 60534-6 . . . . . . . . . . . . . . . . . 142.2.1 Mounting sequence . . . . . . . . . . . . . . . . . . . . . . . . . . 142.2.2 Presetting the valve travel . . . . . . . . . . . . . . . . . . . . . . . 162.3 Attachment to rotary actuators . . . . . . . . . . . . . . . . . . . . . 182.3.1 Mounting the cam follower roll lever . . . . . . . . . . . . . . . . . . 182.3.2 Mounting the intermediate piece . . . . . . . . . . . . . . . . . . . . 182.3.3 Aligning and mounting the cam disk . . . . . . . . . . . . . . . . . . 202.3.4 Reversing amplifiers for double-acting actuators . . . . . . . . . . . . 222.4 Fail-safe position of the actuator . . . . . . . . . . . . . . . . . . . . 22

    3 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.1 Pneumatic connections. . . . . . . . . . . . . . . . . . . . . . . . . 243.1.1 Pressure gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243.1.2 Supply air pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 253.2 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . 253.2.1 Forced venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273.2.2 Limit switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283.2.3 Establishing communication (bus address) . . . . . . . . . . . . . . . 283.2.4 Local interface (SSP) . . . . . . . . . . . . . . . . . . . . . . . . . . 28

    4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.1 LED controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.2 Write protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . 314.3 Activate/deactivate forced venting . . . . . . . . . . . . . . . . . . . 314.4 Default settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314.4.1 Adjusting mechanical zero. . . . . . . . . . . . . . . . . . . . . . . 324.4.2 Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324.5 Adjusting the inductive limit switches . . . . . . . . . . . . . . . . . . 34

    5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

    6 Servicing explosion-protected devices . . . . . . . . . . . . . . . . . 35

    2 EB 8382-1 EN

    Contents

  • 7 How to implement a Class 1 PROFIBUS Master . . . . . . . . . . . . 367.1 Device database files (GSD) . . . . . . . . . . . . . . . . . . . . . . 367.2 Data exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367.3 Parameter description . . . . . . . . . . . . . . . . . . . . . . . . . 407.4 Coding of measured value status . . . . . . . . . . . . . . . . . . . . 427.5 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

    8 List of parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

    9 Messages and diagnostics. . . . . . . . . . . . . . . . . . . . . . . 619.1 Diagnostic messages . . . . . . . . . . . . . . . . . . . . . . . . . 619.2 Extended diagnostic messages . . . . . . . . . . . . . . . . . . . . . 639.3 CHECKBACK messages . . . . . . . . . . . . . . . . . . . . . . . . 649.4 Messages during initialization . . . . . . . . . . . . . . . . . . . . . 66

    Dimensional drawing . . . . . . . . . . . . . . . . . . . . . . . . . 69Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

    EB 8382-1 EN 3

    Contents

    The device is to be assembled, started up or operated only by trained and ex-perienced personnel familiar with the product.According to these mounting and operating instructions, trained personnel isreferred to as individuals who are able to judge the work they are assigned toand recognize possible dangers due to their specialized training, their knowl-edge and experience as well as their knowledge of the applicable standards.

    Explosion-protected versions of this device are to be operated only by person-nel who have undergone special training or instructions, or who are autho-rized to work on explosion-protected devices in hazardous areas.

    Any hazards that could be caused in the positioner by the process medium,the operating pressure, the signal pressure or by moving parts are to be pre-vented by means of the appropriate measures.If inadmissible motions or forces are produced in the pneumatic actuator as aresult of the supply air pressure level, the pressure must be restricted using asuitable supply pressure reducing station.

    Proper shipping and storage are assumed.

    Note! Devices with a CE marking fulfil the requirements of the Directives94/9/EC and 89/336/EEC. The declaration of conformity is available athttp://www.samson.de and on request.

    !

  • Modifications of the firmware compared to the previous version

    Old New

    Control R 1.23 R 1.31

    Firmware adaptation for a new hardware versionHardware version device index .01

    Control R 1.31 R 1.4

    Actuator type When the actuator type is switched from "linear actuator" to "rotary actua-tor", the following applies:Initialization method . . . Based on maximum rangeTransmission code . . . . 590Nominal angle . . . . . 90End position for w < . . . 1 %End position for w > . . . 99 %Rot. angle range starts at 0Rot. angle range ends at 90

    When the actuator type is switched from "rotary actuator" to "linear actua-tor", the following applies:Attachment . . . . . . . Integral . . . . . . . . . NAMURInitialization method . . . Based on nominal range . Based on nom. rangeMounting position: arrow Towards actuator . . . . Away from actuatorTransmission code . . . . D1 . . . . . . . . . . . Pin position . . . . . . . . . . . . . . . . . . . ARated travel . . . . . . . 15 mm . . . . . . . . . 15 mmEnd position for w < . . . 1 % . . . . . . . . . . . 1 %End position for w > . . . 125 % . . . . . . . . . 125 %Lower travel range value. 0 mm . . . . . . . . . . 0 mmUpper travel range value 15 mm . . . . . . . . . 15 mmLever length . . . . . . . . . . . . . . . . . . . 42 mm

    Initialization method When the initialization method is switched from "maximum range" to "nomi-nal range", the following applies:End position for w < 1% End position for w > 125 %

    When the initialization method is switched from "nominal range" to "maxi-mum range", the following applies:End position for w < 1% End position for w > 99 %

    Desired transit timeopen/closed

    The adjustment range of the desired transit time is now limited to 75 s.

    Initialization During initialization, the minimum control pulses are determined for 20 % to80 % of the manipulated variable range and saved in the EEPROM.

    Proportional-actioncoefficientsKP_Y1 and KP_Y2

    The coefficients are adapted to the selected actuator type and the measuredtransit times.

    4 EB 8382-1 EN

    Firmware modifications

  • Control R 1.41 R 1.42

    Correction when zero calibration was triggered by communication.

    Communication K 1.34 K 1.41

    Firmware adaptation for new hardware versionHardware version device index .01

    Communication 1.41 K 1.51

    Bit 7 of the CHECKBACK parameter indicates the current status of controlloop monitoring. In contrast to bit 13, bit 7 is automatically reset when controlloop monitoring detects no further errors. The function of bit 13 remains un-changed. Messages issued by bit 7 are only supported with firmware versionR 1.41 and higher.The "warm start" message indicated by bit 11 of the DIAGNOSIS parameteris automatically reset after 10 s.In Local Override mode, bit 2 of the CHECKBACK parameter is activated.

    Communication 1.51 K 1.60

    A bad set point status no longer causes the positioner to move the valve tofail-safe position in any case. Rather, the positioner's behavior is determinedby the FSAVE_TYPE parameter.

    Using the serial interface, the positioner can be configured and operated withSAMSON's TROVIS-VIEW Configuration and Operator Interface software.

    EB 8382-1 EN 5

    Firmware modifications

  • Positioner

    TravelDirect attachment Type 3277Acc. to IEC 60534-6 (NAMUR)

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