Siemens SINAMICS G120 - Drive Control Via PROFIBUS or PROFINET; Receive Data and Send Data

6.5 Drive control via PROFIBUS or PROFINET
6.5.1 Receive data and send data
Cyclic data exchange
The inverter receives cyclic data from the higher-level control - and returns cyclic data to the
control.
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Figure 6-11 Cyclic data exchange
Inverter and control system pack their data in telegrams.
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Figure 6-12 Telegram structure
Every telegram for cyclic data exchange has the following basic structure:
● Header and trailer form the protocol frame.
● User data is located within the frame:
– PKW: The control can read or change every parameter in the inverter via "PKW data".
Not every telegram has a "PKW range".
– PZD: The inverter receives control commands and setpoints from the higher-level
control - and sends status messages and actual values via "PZD data".
PROFIdrive and telegram numbers
For typical applications, certain telegrams are defined in the PROFIdrive profile and are
assigned a fixed PROFIdrive telegram number. As a consequence, behind a PROFIdrive
telegram number, there is a defined signal composition. As a consequence, a telegram number
uniquely describes cyclic data exchange.
The telegrams are identical for PROFIBUS and PROFINET.
Advanced commissioning
6.5 Drive control via PROFIBUS or PROFINET
Converter with the CU230P-2 Control Units
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE 217