Siemens SINAMICS G120 CU230P-2 HVAC Operating Instructions Manual page 126

Configuring the fieldbus
6.2 Communication via RS485
The following table includes the request ID for telegrams between the master → inverter.
Table 6- 21
Request
identifier
0
1
2
3
4
6
7
8
1) The required element of the parameter description is specified in IND (2nd word).
2) Identifier 1 is identical to identifier 6, ID 2 is identical to 7, and 3 is identical to 8. We recommend
that you use identifiers 6, 7, and 8.
The following table includes the response ID for telegrams between the inverter → master.
The response ID depends on the request ID.
Table 6- 22
Response identifier
0
1
2
3
4
5
6
7
1) The required element of the parameter description is specified in IND (2nd word).
2) The required element of the indexed parameter is specified in IND (2nd word).
124
Request identifier (master → inverter)
No request
Request parameter value
Change parameter value (word)
Change parameter value (double word)
Request descriptive element
Request parameter value
Change parameter value (word)
Change parameter value (double word)
Response identifier (inverter → master)
Description
No response
Transfer parameter value (word)
Transfer parameter value (double word)
Transfer descriptive element
Transfer parameter value (field, word)
Transfer parameter value (field, double word)
Transfer number of field elements
Request cannot be processed, task cannot be executed (with error number)
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Description
1)
1) 2)
1) 2)
1) 2)
1)
2)
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
Response
identifier
Positive Negative
0 7
1 / 2 7
1 7
2 7
3 7
4 / 5 7
4 7
5 7
2)