Siemens SINAMICS G120 - Parameter Channel

6.5.6 Parameter channel
Structure of the parameter channel
The parameter channel consists of four words. The 1st and 2nd words transfer the parameter
number, index and the type of task (read or write). The 3rd and 4th words contain the parameter
content. The parameter contents can be 16-bit values (such as baud rate) or 32-bit values
(e.g. CO parameters).
Bit 11 in the 1st word is reserved and is always assigned 0.
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You can find application examples relating to the parameter channel at the end of this section.
AK: Request and response IDs
Bits 12 … 15 of the 1st The parameter channel words contain the request and response
identifier AK.
Table 6-26 Request identifiers, control → inverter
AK Description Response identifier
positive negative
0 No request 0 7 / 8
1 Request parameter value 1 / 2 7 / 8
2 Change parameter value (word) 1 7 / 8
3 Change parameter value (double word) 2 7 / 8
4 Request descriptive element
1)
3 7 / 8
6
2)
Request parameter value (field)
1)
4 / 5 7 / 8
7
2)
Change parameter value (field, word)
1)
4 7 / 8
8
2)
Change parameter value (field, double word)
1)
5 7 / 8
9 Request number of field elements 6 7 / 8
1)
The required element of the parameter is specified in IND (2nd word).
2)
The following request IDs are identical: 1 ≡ 6, 2 ≡ 7 3 ≡ 8.
We recommend that you use identifiers 6, 7, and 8.
Table 6-27 Response identifiers, inverter → control
AK Description
0 No response
1 Transfer parameter value (word)
2 Transfer parameter value (double word)
Advanced commissioning
6.5 Drive control via PROFIBUS or PROFINET
Converter with the CU230P-2 Control Units
226 Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE