Bronkhorst FLOW-BUS interface Manuale Utente Scaricare il pdf (Pagina 20)

BRONKHORST®

Page20

FLOW‐BUSinterface9.17.024

4.1.3 RemoteinstallationtoFLOW‐BUS

Some FLOW‐BUS modules have to be installed on the bus by means of another FLOW‐BUSmodule or a (personal)

computer.Thiscanbedoneasfollows:



 WithaReadout/Controlmodule,seriesE‐7000orwithasoftwareprogramonthe PC thisnewmodulecanbe

searched.

 The Reado

ut/Controlmoduleor PC‐programwill findthe firstfree node‐addresscountedfrom address 3 (3 is

firstfreeaddress).

 Thisfreeaddressnumberwillbesendtothenewmodule,whichshouldbecomeactiveonthisaddress.

 After a reset command, also send by the Readout/Co

ntrol module or PC‐program, the new module will be

operationalontheFLOW‐BUSsystem.



Makesuretoinstallonlyonenewmoduleatthesametime.



4.1.4 Installtobusonapre‐definednode‐addressorre‐addressinstrumentonthebus

InsomeapplicationsitisnecessarytoputFLOW‐BUSdevicesonpre‐definedaddressesbecauseoftheapplication

softwareexpectingthisdeviceonthisaddress(e.g.PLC‐applications).Thiscanbedoneasfollows:

(Installnewmoduletothebusasdescribedinthepreviousparagraphs.)



 Bymeansoftherotaryswitchonth

einstrument(ifpresent).

 Bymeansofthemicro‐switchontheinstrument.Seeinstructionmanual9.17.023.

 By means of the special menu in an E‐7000 module for digital instruments it is possible to (re‐) address

instrumentsonthebus.

 Gototh

especificmenupartandreadthePNA(PrimaryNodeAddress)number.

 Fill‐intheaddressyouwanttheinstrumenttohaveonthebus.

 TheE ‐7000modulewillcheckifthisaddressisalreadyoccupiedbyanotherinstrument.Ifso,youcouldremove

theotheroneandtryag

ain,orenteranotheraddress.

 Themodulewillrestartandwillgetitsnewaddressfromthatmomenton.



BecauseitisnotallowedinaFLOW‐BUSsystemtohave2devicesonthesamenode‐address,at

(re)startoftheinstrumenttherewillalsobeacheckperformedifitsnode‐address(inmemory)is

alreadyoccupiedbyanotherdevice.Ifso,theredLEDwillblinkslowly.Atthatmom

entthemoduleis

notoperationalonthebus.Youfirsthavetore‐installit.Theeasiestwaytodothisistopressthemicro

push‐buttonontopoftheinstrumentuntilthegreenLEDstartsblinkingfast.Afterreleasingthebutton

theinstrumentwillinstallitselfonth

ebusautomaticallyonafreeaddress.WhenthegreenLEDis

burningcontinuously,theinstrumentisoperational.



Ifyoutakeoneormoremodulesoutofyoursystem,orifoneormoremodulesdonotgetpower,be

carefulinstallingnewmodules,orchangingtheconfiguration.Thissituationmayoccurifyoutake

modulesoutforservice.Ifyoudon’tchangetheconfiguration,youcanreplaceyourse

rviced

instrument/moduleinyoursystemwithoutanyproblem.Mostlynewmoduleswillgetthefirstfree

address,countedfromaddress3(3willbethefirst).Thiscouldbeanaddresswhichshouldnotbe

occupied(e.g.fromamodulewhichhasbeentaken‐outforservice).Inthatcaseinstallth

enewmodule

andre‐addressitasdescribed,toavoidFLOW‐BUScommunicationproblems.



Whenconnectinganinstrument/moduletotheFLOW‐BUS,makesurethattheinstrument/moduleisin

power‐offmode.Afterconnectiontothebusyoucanswitchpoweron.Atpower‐uptherewillbea

checktoavoidthesituationoftwomodulesonthesamebusaddress.Thisisimportantfo

rerror‐free

bus‐communication.



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Bronkhorst FLOW-BUS interface Manuale Utente Pagina 20

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