Siemens SINAMICS G115D Operating Instructions Manual page 185

To reduce the transfer volume, there is not only the "normal" "data exchange" PIV
mechanism, but also the "Read data" and "Write data" commands.
• Data exchange:
– Control → converter request
– Converter → control response
• Read data:
The converter sends a read command, and the data of the last exchange request or write
request is transferred from the converter to the control.
• Write data
Write OK: → 53 hex.
Because the PIV transfer protocol specifies the transfer direction independently, all
parameters can be transferred as data exchange request/response. Requests for reading and
writing data are included primarily to reduce the transferred data volume for the repeated
reading or writing of parameters.
Data exchange
Reading data
The data for the last write or exchange request is read
SINAMICS G115D Wall Mounted distributed drive
Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA
Advanced commissioning
7.7 Drive control via AS-i
183