Acyclic Communication - Standard; Acyclic Communication - Manufacturer-Specific - Siemens Sinamics G110M Operating Instructions Manual

Advanced commissioning
6.5 Control via AS-i
Once a setpoint has been transferred completely, the setpoint present in the control will be
transferred as next setpoint. Any setpoint changes made during the transfer are not
considered.
6.5.6

Acyclic communication - standard

This type of acyclical communication supports the ID read request and the diagnostic read
request. All other requests receive the "request not implemented" message response.
● ID request:
– Master -> slave
– Slave -> master
● Diagnostic request:
– Master -> slave
– Slave -> master no error
The following repsonse is issued for all other write or read requests:
● Read requests
● Write requests
6.5.7

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.
(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.
174
Slave -> master general error
AS-i System Interface Manual
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Distributed converter for SIMOGEAR geared motors
Operating Instructions, 09/2017, FW V4.7.9, A5E31298649B AH