Samson 3738-50 Feuille d'instructions

Translation of original instructions

KH 8390-5 EN

Firmware version 1.01

Type 3738-50 Electronic Limit Switch

Communication: FOUNDATION™ eldbus

Edition December 2013

The mounting and operating instructions for the devices are included in

the scope of delivery. The latest documentation is available on our website

at www.samson.de > Service & Support > Downloads > Documentation.

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

2 KH 8390-5 EN

Refer to the Mounting and Operating Instructions EB 8390-5 for details on mounting, start-

up and local operation of the electronic limit switch.

Note

Contents

KH 8390-5 EN 3

1 Introduction ..................................................................................................5

2 Principle of operation ....................................................................................6

2.1 Versions ........................................................................................................6

2.1.1 Forced venting ...............................................................................................6

2.2 Operating/congurationmode .......................................................................6

3 CongurationusingTROVIS-VIEWsoftware....................................................8

3.1 CongurationusingtheNI-BUS™Congurator................................................8

3.2 Communication .............................................................................................8

4 FOUNDATION™ eldbusblockmodel........................................................9

5 Writeprotection ..........................................................................................10

6 Endpositioncalibrationinthedevice ...........................................................10

7 Resettingthedevice.....................................................................................10

8 Statusclassicationandcondensedstate......................................................11

9 Blockmodel ................................................................................................14

9.1 ResourceBlock(RES) ....................................................................................14

9.2 FunctionBlocks ............................................................................................14

9.2.1 DiscreteInputFunctionBlock(DI1FBtoDI5FB) ..............................................14

9.2.2 DiscreteOutputFunctionBlock(DO1FBtoDO5FB) .......................................16

9.2.3 AnalogInputFunctionBlock(AIFB)...............................................................17

9.3 TransducerBlocks.........................................................................................17

9.3.1 LimitSwitchTransducerBlock(LSTRD) ...........................................................18

10 Parameters .................................................................................................18

4 KH 8390-5 EN

KH 8390-5 EN 5

Introduction

1 Introduction

This section is based upon:

−Fieldbus FOUNDATION™Specication“FunctionBlockApplicationProcessPart1–3“Re-

vision1.7(FF-890toFF-892)

−Fieldbus FOUNDATION™Specication“PositionerTransducerBlock“Revision3.0(FF-

906)

Type 3738-50 Electronic Limit Switch

TheType3738-50ElectronicLimitSwitchallowson/offvalvestobeactuatedbyanintegrat-

ed or external solenoid valve as well as their discrete end positions to be read out by a

FOUNDATION™eldbusnetworkaccordingtoIEC61158-2.

Specialfeatures:

−LinkMasterCapability

−PowersuppliedbyFOUNDATION™eldbus

(solenoidvalvewithlowenergyconsumptionof6VDC)

−Simplediscreteactuationofon/offvalvesovera

FOUNDATION™

eldbusnetwork

−Easytoattachtocommonlyavailablelinearactuators(NAMURattachment)aswellas

rotaryactuatorsaccordingtoVDI/VDE3845

−Non-contactsensingoftherotationanglebyamagnetoresistivesensorsystem

−Simpleone-knob,menu-drivenoperation

−Automaticstart-up

−LCD easy to read in any mounting position due to selectable reading direction

−Integrateddiagnosticswithpartialstroketesting(PST)

−Classiedstatusalarmsacc.toNAMURRecommendationNE107

−Parameterscanbechangedonline

−Permanentstorageofallparametersinnon-volatileEEPROM(protectionagainstpowerfail-

ure)

−Version with integrated solenoid valve or for external solenoid valve

6 KH 8390-5 EN

Principle of operation

2 Principle of operation

The electronic limit switch is designed for attachment to pneumatic actuators. The current

valvepositionismeasuredwithoutcontactusingamagnet(onascrew)positionedcentrically

ontheactuatorshaft.Thescrewwithmagnetdoesnotneedtobeadjusted.TheAMR(aniso-

tropicmagnetoresistive)sensorlocatedinthedevicetogetherwiththemeasuringelectronics

(1)candetectthedirectionalchangeoftheappliedmagneticeldand,asaresult,sensethe

movement of the actuator.

Thepneumaticactuatorisoperatedbyasolenoidvalve(6,8)whichconvertsthesignalis-

sued by the control system into a binary pressure signal.

2.1 Versions

Versionwithintegratedsolenoidvalve(Type3738-50-xxx4x00x1x00x0)

The solenoid valve is integrated into the housing of the electronic limit switch. The electronic

limit switch and the solenoid valve are powered by the connected FOUNDATION™eldbus

two-wirecableaccordingtoIEC61158-2.

Versionforexternalsolenoidvalve(Type3738-50-xxx0x00x1x00x0)

The electronic limit switch and the external solenoid valve are powered by the connected

FOUNDATION™eldbustwo-wirecableaccordingtoIEC61158-2.

2.1.1 Forcedventing

Theelectroniclimitswitchcanoptionallybettedwithaforcedventing function. This func-

tionisactivatedwhenthesolenoidvalveisde-energizedafterthepowersupplyisinterrupt-

ed,causingtheactuatortomovethecontrolvalvetoitsfail-safeposition.

2.2 Operating/congurationmode

Theelectroniclimitswitchhastwomodes:theoperatingmode(RUN)andtheconguration

mode(SET).SwitchoverbetweenthetwomodesisperformedintheOperatingmodeparam-

eterupage 40.

−RUN:Operatingmode:congurationforstart-upandpartialstroketesting(PST)not pos-

sible

−SET: Congurationmode:(nooperation),congurationforstart-upandpartialstroke

testing(PST)

KH 8390-5 EN 7

Principle of operation

SSP

interface

11 10

3FOUNDATION™

fieldbus

IEC 61158-2

912

Signal for forced venting*

Electronic

limit switch

ctuator

1 AMRsensorwithelectronics

2 A/D converter

3 Microcontroller

4 Interfacemodule(IEC61158-2)

5 Actuationofforcedventing

6 Solenoidvalve

 (Type3738-50-xxx4x00x1x00x0)

7 Air capacity booster

 (Type3738-50-xxx4x00x1x00x0)

8* External solenoid valve

 (Type3738-50-xxx0x00x1x00x0)

9 Electrical isolation

10 Display

11 Rotary pushbutton

12 Temperature sensor

* Optional

Fig.1: Functional diagram of Type 3738-50 Electronic Limit Switch

8 KH 8390-5 EN

CongurationusingTROVIS-VIEWsoftware

3 CongurationusingTROVIS-VIEWsoftware

TheelectroniclimitswitchcanbeconguredusingtheTROVIS-VIEWCongurationandOp-

eratorInterfacesoftware.

The electronic limit switch is equipped with an additional digital serial interface to connect

theRS-232orUSBportofthecomputertotheelectroniclimitswitchoveranadaptercable.

TheTROVIS-VIEWsoftwareenablestheusertoeasilysetparametersintheelectroniclimit

switch and view process parameters online.

3.1 CongurationusingtheNI-BUS™Congurator

TheNI-FBUS™ConguratorfromNationalInstrumentscanalsobeusedtocongurethe

electronic limit switch. An FF interface card is required for connection to FOUNDATION™eld-

bus.

TheintegratedfunctionblockscanbelinkedusingtheNI-FBUS™Congurator.

3.2 Communication

The electronic limit switch is completely controlled over the digital signal transmission imple-

mented 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 electronic limit switch, which require a long calculation

time or lead to a large quantity of data being saved in the volatile memory of the electronic

limit switch, the alert ‘busy’ is issued over FOUNDATION™eldbus. This alert is not an error

message and can be simply conrmed.

Note

KH 8390-5 EN 9

FOUNDATION™eldbusblockmodel

4 FOUNDATION™ eldbusblockmodel

FOUNDATION™eldbus assigns all the functions and data of a device to different types of

blocks.Eachtypeofblockhasadifferentrangeoftaskstofulllintheblockmodel.Thefol-

lowingtypesofblocksareimplementedintheSAMSONType3738-50ElectronicLimit

Switch:

ResourceBlock(RES)

TheResourceBlockcontainsallthespeciccharacteristicsassociatedwithadeviceonthe

eldbus,forexample,devicename,manufacturernumberandserialnumber.Adevicecan

onlyhaveoneResourceBlock.

FunctionBlocks(FB)

FunctionblocksareresponsibleforthecontrolbehaviorofaFOUNDATION™eldbusdevice.

A FOUNDATION™eldbusapplicationcanbeconguredbyconnectingtheinputsandout-

putsoffunctionblocks.ThefollowingfunctionblocksareimplementedintheType3738-50:

5xDiscreteInputFunctionBlocks(DIFB);executiontime20ms

5xDiscreteOutputFunctionBlocks(DOFB);executiontime30ms

1xAnalogInputFunctionBlock(AIFB)

analogpositionfeedback;executiontime20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 LimitSwitchTransducerBlock(LSTRD)

5x DiscreteInputTransducerBlocks(DITRD)

5x DiscreteOutputTransducerBlocks(DOTRD)

1x AnalogInputTransducerBlock(AITRD)

10 KH 8390-5 EN

Writeprotection

5 Writeprotection

The Local operation parameter upage28allowsthelocaloperation(accessusing

TROVIS-VIEWandon-siteoperation)oftheelectroniclimitswitchtobelocked.Anactive

lockingisindicatedby on the display.

Operation over the FOUNDATION™ eldbus network can be locked by the local operation

(Code P18). When this locking function is active, device data can only be read over the

FOUNDATION™ eldbus network, but data in the device cannot be overwritten.

6 Endpositioncalibrationinthedevice

Whenthezeropointorendpositionsareincorrect,itmaybenecessarytorecalibratethem.

Alwaysperformanendpositioncalibrationforthefail-safepositionandfortheoperating

position. The end position calibration can be started by the START_ABORT_CMD parameter

oftheLSTranducerBlock.StatusinformationcanbereadintheStatusofendpositioncali-

bration parameter upage 38.

The end position calibration is automatically canceled if an error occurs. The error can be

read in the ACTUAL_DEVICE_ERROR(70)parameteroftheLSTranducerBlock.

7 Resettingthedevice

Resettingstart-updata

Resetthestart-updataintheP21parameter(localoperation).

Resettingidenticationdataandtheblockconguration

Resettheidenticationdatafortheelectroniclimitswitch,valveandactuatorbyselecting‘3’

in the RESET_CMD(63)parameteroftheLSTranducerBlock.Additionally,thesettingsofthe

functionblocksareresettotheirdefaultsettings.Thestart-updataandloggingsremain

saved.

Note

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