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S1A10386 10/2009 21
PROFIBUS DP mapping
Output PZDs
The first eight bytes contain an aperiodic request (PKW) to write or read a parameter.
The remaining 4 bytes contain the output PZDs (written from the PROFIBUS DP master).
Cyclic control and adjustment parameters:
PZD1: Communication scanner output word 1 (NC1)
PZD2: Communication scanner output word 2 (NC2)
The default assignment of the periodic output data is:
• PZD1 = Command word
• PZD2 = Speed target
Input PZDs
The first eight bytes contain the response (PKW) to the aperiodic read/write request.
The remaining 4 bytes contain the input PZDs (read mode).
Cyclic monitoring parameters:
PZD1: Communication scanner input word 1 (ETA)
PZD2: Communication scanner input word 2 (RFRD)
The default assignment of the periodic input data is:
• PZD1 = Status word (ETA)
• PZD2 = Output speed (RFRD)
123456789101112
PKW PZD1 PZD2
PKE 0 R/W PWE CMD LFRD
PKW request
PKE Parameter logic address
RIW Request code:
0: No request
1: Read
2: Write
PWE For a read request: Not used
For a write request: Parameter value
12 3 4 56789101112
PKW PZD1 PZD2
PKE 0 R/W PWE Command word Speed target
123456789101112
PKW PZD1 PZD2
PKE 0 R/W/N PWE ETA RFRD
PKW request
PKE Parameter logic address
R/W/N Response code:
0: No request
1: Successful read report
2: Successful write report
7: Error report
PWE For a successful request: Parameter value
For an incorrect request:
0: Incorrect address
1: Write access denied
1 2 3 4 5 6 7 8 9 10 11 12
PKW PZD1 PZD2
PKE 0 R/W PWE Status word Output speed