Beijer-electronics AN-BEI-P2-038 Instrukcja Użytkownika Pobierz pdf (Strona 15)

APPLICATIONNOTEAN‐BEI‐P2‐038 Date:15/02/12



AN‐BEI‐P2‐038ModbusRTUControlandRegisterMapping

15



ModbusExceptionResponseTelegrams

Undersomecircumstances,thedrivemayreplywithanExceptionResponse(error)inresponsetoarequesttelegramsentfrom

thenetworkmaster,forexamplewherethemastertriestoreadaregisterwhichdoesnotexist.ExceptionResponseswhichcan

begeneratedbythedrive

arelistedbelow:‐



ExceptionCode1:InvalidRequest

Returnedunderthefollowingconditions

• NetworkMastersendsanunsupportedModbuscommand(e.g.ReadCoils).

• RuncommandissuedtodrivewhilstthedriveisnotsetforModbusControlMode(e.g.P1‐12<>4).

• Runcommandissuedto

driveswhilstthedriveisnotenabled(e.g.DigitalInput1isopen).

• Runcommandissuedtodrivewhilstthedriveisinatrippedcondition.



ExceptionCode2:InvalidModbusregister

Returnedunderthefollowingconditions

• NetworkMasterattemptstoreadorwritearegisterthatdoes

notexistwithinthedrive.



ExceptionCode3:RegisterValueOutofRange

Returnedunderthefollowingconditions

• NetworkMasterattemptstowriteaholdingregisterwithavalueoutsidetherangeoftheregister



ExceptionCode6:DriveBusy

Returnedunderthefollowingconditions

• Drivebusydue

tointernaldatatransfer.TheNetworkMastershouldre‐sendthemessageafteradelay



Dataflowexample:

Readdatafromregister6:



Request:[01] [03][00][05] [00][01][94][0B]

 (DriveAddr)(Command)(Regstartaddr)(No.ofRegisters)(Checksum)



Reply:[01] [03][02] [00][00][B8]

[44]

 (DriveAddr)(Command)(Noofdatabytes)(Data) (Checksum)



Note:Theactualstartaddressofregister6is5.Alldatain[]isin8bitsHexformat.



Writestartcommandtotheregister1(supposeP1‐12=4,P1‐13=1anddigitalinput1

isclosed):



Request: [01] [06] [00][00] [00][01] [48][0A]

(DriveAddr) (Command) (Regaddr) (Datavalue) (Checksum)



Reply: [01] [06] [00][00] [00][01] [48][0A]

  (DriveAddr) (Command) (Regaddr) (Datavalue) (Checksum)



Note:Theactualaddressofregister1onthedatalinkis0.

Alldatain[]isin8bitsHexformat.

Replycanbeerrormessagedependingondriveparametersettingsanddigitalinputstatus.



1 2 ... 10 11 12 13 14 15 16

Komentarze do niniejszej Instrukcji

Brak uwag

Beijer-electronics AN-BEI-P2-038 Instrukcja Użytkownika Strona 15

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Sprzęt komputerowy Beijer-electronics AN-BEI-P2-038