Siemens SINAMICS G120 Operating Instructions Manual page 178

Functions
5.11 Operation in fieldbus systems
Data structure of the parameter channel
Parameter channel
The parameter channel can be used to process and monitor process data (write/read) as
described below. The parameter channel always comprises four words.
Figure 5-33
Parameter ID (PKE), first word
The parameter ID (PKE) is always a 16 bit value.
Figure 5-34
● Bits 0 to 10 (PNU) contain the rest of the parameter number (value range 1 to 61999).
An offset must be added, which is defined by IND with the upper bits (acyclic) or the lower
bits (cyclic) of the byte, for parameter numbers ≥ 2000.
● Bit 11 (SPM) is reserved and is always 0.
● Bits 12 to 15 (AK) contain the request or response ID.
178
Structure of the parameter channel in the telegram structure
PKE structure
CU240S and CU240E Control Units, FW 3.2
Operating Instructions, 03/2009, A5E02440075B AA