Bronkhorst RS232 interface Bedienungsanleitung PDF herunterladen (Seite 14)

BRONKHORST®

Page14RS232interface    9.17.027

Value Meaning

1,2,8 generalerror



3.4 COMMUNICATI ONMESSAGES

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Communicationmessages between FLOW‐BUSinterfacesandotherdevicesconsist of commandstringswithspecific

information.Thiscommand stringiseitherASCII(RS232)orBINARY. Basically thestring contains several information

bytes.ThroughRS232thesehexadecimalbytesareconvertedinASCII(e.g.:bytevalue0x0Ais"0A"inASCIIand

capital

lettersshould be used).MessagesviaRS232arepreceded bythe“:”character andterminatedwith"\r\n"(Carriage

return‐Line‐feed).

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ThereareseveralCOMMANDSavailableintheFLOW‐BUSmessages.OnlycommandRD(04)andWR(01)arerequired

forallthestandardparameterreadingandwriting.A

RDcommandwillbeansweredwithaWRcommand,containing

thevalueaskedfororastatusmessage,containinganerrornumber.A WRcommandwillbeansweredwithastatus

message,containinganerrornumber(iferrornumber=0,thanWRcommandwasOK).

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SCIIcharacter:hashexadecimalvalue:3A

ASCIIcharacter‘\r’hashexadecimalvalue:0D

ASCIIcharacter‘\n’hashexadecimalvalue:0A

3.4.1 Communicationcommands

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Communicationcommands

Command Description

00 Statusmessage

01 Sendparameterwithdestinationaddress,willbeansweredwithtype00command

02 Sendparameterwithdestinationaddress,nostatusrequested

03 Sendparameterwithsourceaddress,nostatusrequested

04 Requestparameter,willbeansweredwithtype02or00command

06 Stopprocess

07 Startprocess

08 Claimprocess

09 Unclaimprocess

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Toaccessaspecificparameteryouneedtoknowthefollowingpoints.

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 Nodeaddress eachFLOW‐BUSdeviceisconnectedtoaspecificnodeaddressinthesystem.

 Processnumber eachdevice(node)consistsofseveralprocesses.

 Parameternumber(FBnr) eachprocessconsistsofseveralparameters.



Parametertype eachparametercanbeofadifferenttypeandvalue.

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Forparametersnumbersandvaluesseetables“parameterproperties”and“parametervalues”inthis

manual.

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