5 telegram structure, 1 header, Telegram structure – Pilz PNOZ m B0 User Manual
Page 30: Header
Communication modules
Operating Manual PNOZmulti 2 Communication Interfaces
1002971EN02
30
2. Response:
The PNOZmulti 2 sends a response to the communications partner after approx. 20 to 30
ms, confirming that the request has been received without error. Data is sent in accordance
with the request.
5.5
Telegram structure
The telegram used for communication consists of:
}
a header,
}
the payload,
}
a footer.
Telegram
section
Byte
Request
Byte
Response
Header
0
0x05
0
0x05
1
0x15
1
0x15
2
0x00
2
0x00
3
Payload amount +5
3
Payload amount +5
4
Request No.
4
Confirmation/error
5
Segment No. HB
5
Segment No. HB
6
Segment No. LB
6
Segment No. LB
7
0x00
7
Reserved
Payload
8
Payload Byte 0
8
Payload Byte 0
9
Payload Byte 1
9
Payload Byte 1
10
Payload Byte 2
10
Payload Byte 2
...
...
...
...
Payload
amount +7
Payload Byte n
Payload
amount +7
Payload Byte n
Footer
Payload
amount +8
BCC
Payload
amount +8
BCC
Payload
amount +9
0x10
Payload
amount +9
0x10
5.5.1
Header
Byte 0 ... Byte 7 form the data block's header
}
Byte 0: Always 0x05
}
Byte 1: Always 0x15
}
Byte 2: Always 0x00
}
Byte 3: Payload amount plus 5
}
Byte 4
–
Request: Request number
A request is defined via the request number