Data Structure Of The Parameter Channel - Siemens SINAMICS G120 Operating Instructions Manual

Advanced commissioning
6.5 Drive control via PROFIBUS or PROFINET
6.5.4

Data structure of the parameter channel

Structure of the parameter channel
The parameter channel consists of four words. 1. and 2nd word transfer the parameter number
and index as well as the type of job (read or write) The 3rd and 4th word contains the parameter
contents. 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.
You can find examples of telegrams 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 6-25
AK
0
1
2
3
4
6
2)
7
2)
8
2)
9
The required element of the parameter is specified in IND (2nd word).
1)
The following request IDs are identical: 1 ≡ 6, 2 ≡ 7 3 ≡ 8.
2)
We recommend that you use identifiers 6, 7, and 8.
Table 6-26
AK
0
1
2
204
Request identifiers, control → inverter
Description
No request
Request parameter value
Change parameter value (word)
Change parameter value (double word)
Request descriptive element
Request parameter value (field)
Change parameter value (field, word)
Change parameter value (field, double word)
Request number of field elements
Response identifiers, inverter → control
Description
No response
Transfer parameter value (word)
Transfer parameter value (double word)
1)
1)
1)
1)
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2017, FW V4.7 SP6, A5E34259001B AD
Response identifier
positive negative
0 7 / 8
1 / 2 7 / 8
1 7 / 8
2 7 / 8
3 7 / 8
4 / 5 7 / 8
4 7 / 8
5 7 / 8
6 7 / 8