Technical data

Communication
9.5 Communication using USS
Function Manual
Function Manual, 06/2012, 6SL3097-4AB10-0BP4
683
Parameter identifier (PKE), first word
The parameter identifier (PKE) is always a 16-bit value.
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Figure 9-50 PKE structure
● Bits 0 to 10 (PNU) contain the remainder of the parameter number (value range 1 to
61999).
For parameter numbers ≥ 2000, an offset must be added that is defined using the upper bits
of the IND byte.
● Bit 11 (SPM) is reserved and always = 0.
● Bits 12 to 15 (AK) contain the request or response identifier.
The significance of the request identifier for request telegrams (master → inverter) is
described in the following table.
Table 9- 45 Request identifier (master → inverter)
Response
identifier
Request
identifier
Description
Positive Negative
0 No request 0 7
1 Request parameter value 1 / 2 7
2 Change parameter value (word) 1 7
3 Change parameter value (double word) 2 7
4 Request descriptive element
1)
3 7
6 Request parameter value
1) 2)
4 / 5 7
7 Change parameter value (word)
1) 2)
4 7
8 Change parameter value (double word)
1) 2)
5 7
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 significance of the response identifier for response telegrams (inverter → master) is
described in the following table. The request identifier determines which response identifiers
are possible.