Siemens SINAMICS G120 CU240B-2 Operating Instructions Manual page 136

Connection to a fieldbus
6.4 Communication via RS485
Parameter identifier (PKE), 1st word
The parameter identifier (PKE) is always a 16-bit value.
Figure 6-14
● Bits 12 to 15 (AK) contain the request or response identifier.
● Bit 11 (SPM) is reserved and always = 0.
● Bits 0 to 10 (PNU) contain parameter numbers 1 ... 1999. For parameter numbers
The following table includes the request ID for telegrams between the master → inverter.
Table 6- 20
Request
identifier
0
1
2
3
4
6
7
8
1) The required element of the parameter description is specified in IND (second 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.
136
PKE structure
≥ 2000, you must add an offset in the 2nd word of the parameter channel (IND).
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)
Description
1)
1) 2)
1) 2)
1) 2)
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
Response
identifier
Positive Negative
0 7
1 / 2 7
1 7
2 7
3 7
4 / 5 7
4 7
5 7