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Communicationmodules

OperatingManualPNOZmulti2CommunicationInterfaces

1002971EN02

– Response:Confirmationofrequest

Therequestisconfirmed:Requestnumber+0x80(Bit7set).

Iftherequestcannotbeprocessed,anerrormessageisreturnedTroubleshooting[

44].

}

Byte5:HighByteofsegmentnumber

}

Byte6:LowByteofsegmentnumber

}

Byte7

– Request:Always0x00

– Response:Reserved

5.5.2 Usabledata

ThetelegramcontainspayloadfromByte8.Thecontentandnumberofpayloadbytesde

pendontherequest.040bytesofpayloadcanbetransmitted.Ifthereisnopayload

available,theBCC(BlockControlCheck)willfollowdirectlyafterByte7.

Thelastbyteofpayloadisthebyte"Payloadamount+7".

Ifatelegramcontains13payloadbytes,forexample,Byte20willbethelastpayloadbyte.

5.5.3 Footer

Thebytes"Payloadamount+8"and"Payloadamount+9"containthe

}

checksum(BlockControlCheck=BCC)inthebyte"Payloadamount+8":

Thechecksumiscalculatedasfollows:

BCC=0–(Byte4+...+Byte"Payloadamount+7")

}

0x10asidentifierforthetelegramendinthebyte"Payloadamount+9".

Examplefor13bytesofpayload:

}

ChecksuminByte21

– Content:0(SumoftheBytes4+…+Byte20)

}

0x10asidentifierforthetelegramendisinByte22.

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