Lenze PROFINET 9400 - Acyclic Data Transmission Process

Lenze · E94AYCER communication module (PROFINET®) · Communication Manual · DMS 11.0 EN · 04/2016 · TD17 59
9 Parameter data transfer
9.1 The acyclic channel (PROFIdrive profile)
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9.1.2 Acyclic data transmission process
[9-2] Data communication via the acyclic channel
• A "Write.req" is used to transmit the data set (DB47) in the form of a parameter request to the
I/O device.
• "Write.res" confirms the receipt of the message by the I/O controller.
• The I/O controller requests the response of the I/O device with "Read.req".
• The I/O device responds with a "Read.res (-)" if processing is not yet completed.
• After parameter processing, the parameter request is completed by transmitting the parameter
response in the form of a "Read.res (+)" to the I/O controller.
E94YCER011
Write.res
withdata (parameter request)
withdata (parameter response)
without data
without data
without data
without data
Read.req
Read.res (-)
Read.req
Read.res (+)Parameter response
Paramet
er request
Parameter request
Parameter
processing
Parameter response
IO controller
IO device
Write.req (DB47)