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3.5. The Access to the PROFIBUS parameter
In the cyclic PROFIBUS-DP communication, the parameter data is transferred via PPO
TYPE1 and 2. If the requirement is not executed, the cause is distinguished by octet 7 and
8.
PKW
(Parameter ID/value)
PZD
Process data (cyclically)
PKE IND PWE
PZD1
STW
ZSW
PZD2
HSW
HIW
Octet 1 Octet 2 Octet 3 Octet 4 Octet 5 Octet 6 Octet 7 Octet 8
PKE (Parameter ID)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
AK (Request from Master to PDP002Z）
Request ID Function Note
0 No task
1 Request parameter value for PNU access
2 Change parameter value (word) for PNU access
6 Request parameter value (array) for PNU access, VF-AS1/PS1 parameter access
7 Change parameter value (array) for PNU access, VF-AS1/PS1 parameter access
AK (Response from PDP002Z to Master)
Response ID Function
0 No response
1 Transfer parameter value (word)
4 Transfer parameter value (array)
7 Task can not be executed, followed by error number
0 = Illegal parameter number
1 = Parameter value cannot be changed
2 = Lower or upper limit violated
3 = Erroneous sub index
11 = No parameter change rights
17 = Task cannot be executed due to operating status
(e.g. parameter is currently read-only)
18 = Other error
102 = Request not supported
SPM: always 0.
AK
(Task ID/Response ID)
PNU
(Parameter number)
SPM