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Configuring the fieldbus
6.1 Communication via PROFIBUS
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
107
6.1.4.3
Data structure of the parameter channel
Parameter channel
You can write and read parameter values via the parameter channel, e.g. in order to monitor
process data. The parameter channel always comprises four words.
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Figure 6-1
Structure of the parameter channel
Parameter identifier (PKE), 1st word
The parameter identifier (PKE) contains 16 bits.
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Figure 6-2
PKE - 1st word in parameter channel
●
Bits 12 to 15 (AK) contain the request or response identifier.
●
Bit 11 (SPM) is reserved and is always 0.
●
Bits 0 to 10 (PNU) contain parameter numbers 1 … 1999. For parameter numbers ≥ 2000
an offset must be added that is defined in the 2nd word of the parameter channel (IND).
The meaning of the request identifier for request telegrams (control → inverter) is explained
in the following table.
Содержание SINAMICS G120 CU230P-2
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