Bronkhorst RS232 interface Manuel d'utilisateur télécharger pdf (Page 30)

BRONKHORST®

Page30RS232interface    9.17.027

6 TROUBLESHOOTING



6.1 LEDINDICATIONS



LEDindicationscanbeveryusefulincaseofproblemswiththeinstrument.

ThegreenLEDisnormallyusedforinstrumentstatusindication,likenormaloperationorspecialfunctionmode.For

DeviceNetitisalsopossibletoshowthattheinstrumentisinabortstateandidlestate.Thered

LEDisnormallyused

toforerror/warningindication(howlongertheflash,howgreaterthetrouble).



Moreinformationcanbefoundinthemanual“917023Operationalinstructionsdigitalinstruments

”

Thisdocumentcanbefoundat:

http://www.bronkhorst.com/en/downloads/instruction_manuals/



6.2 TROUBLESHOOTINGHINTSANDTIPS



SITUATION Description

RS232communicationproblems Checkcables.Makesurecorrectcablesareusedforspecificpurpose.



Checkaddressofinterface(slave).Sendingmessagestonode128willmostly

beacceptedbytheinterface.



Trytoresettheinstrumentand/orrestartyourPC/PLC.



MakesureyourmessagesareassembledaccordingtoFLOW‐BUS

protocol

description.



Makesuretheparametervaluesyoutrytoread/writeareavailableandin

thecorrectranges(checktables).



Controllerdoesn’trespondonsetpoints:

 Checkcontrolmode,when0andotherfieldbusgiveserror:safestate

willbeentered,resultinginsafesetpoint.Canbeoverruledby

making

controlmode=18(RS232onlyoperation)

 Alarmorcountermoduleininstrumentforcessetpointtoalarmsetpoint.

Resetalarmorcounterandproceed.

 Setpointslopecouldhaveveryhighvalue.Newsetpointswillbereached

whenthisslopetimehasbeenelapsed.Makesetpointslopesmaller.

 Controlmodecouldhaveothervaluethan0or18.Checkfunctionwhen

valueisdifferent.

 Ifmeasuredoesn’tchangecheckforwardpressureandpiping(evt.shut‐

offvalves).

 Makesuresetpointsarewithinallowedrange:0...32000(=0...100%).

 Makesuresetpointsaresendtoproperinstrument

andprocess(mostly=

1)andparameter(FBnrforsetpoint=1),andtypeofdataiscorrect

(shortinteger=2bytesMSBfirst)



Other(FLOW‐BUS)problems ContactBronkhorst localsalesrepresentativeorsende‐maildescribingyour

problemto:seeservicechapter.

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Bronkhorst RS232 interface Manuel d'utilisateur Page 30

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