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PROFINET IO protocol
Modbus TCP Communication
PLC
Drive
PLC sends request for an operation
Write request
(for example reading value for an ID)
Drive responds that it will process
Write response (OK)
the request
PLC waits until drive has finished processing the request
PLC sends request for the result of
Read request
the operation
Drive responds with operation result
Read response (OK)
(for example: operation OK, value is
100).
11753_uk
Figure 8.Successful paramater channel operation
Figure 9.Wireshark capture of requesting value for ID103
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
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