Samson 3738-50 Instruction sheet

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
T
SSP
interface
11 10
3FOUNDATION™
fieldbus
IEC 61158-2
2
5
8*
1
912
4
Signal for forced venting*
6
7
Electronic
limit switch
A
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