Acyclic Communication - Manufacturer-Specific - Siemens Sinamics G110M Original Instructions Manual

Configure fieldbus
7.5 Communications via AS-i
7.5.5.3

Acyclic communication - manufacturer-specific

The manufacturer-specific acyclical communication is performed via data record 47 in PIV
format. The PIV format structure is identical with that for the USS parameter channel, see
AS-i System Interface Manual
(https://support.industry.siemens.com/cs/gb/en/view/1171856).
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 -> inverter request
– Inverter -> control response
● Read data:
The inverter sends a read command, and the data of the last exchange request or write
request is transferred from the inverter 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
158
SINAMICS G110M Operating Instructions
Operating Instructions, 04/2015, FW V4.7.3, A5E31298649B AD