7. Internal Web pages
Issue 06/15 Publication PUB059-002-00 105 of 136
Fig 77: Modbus Message Generator web page
The Modbus Message screen allows a specific query to be sent to the system and the response to be
viewed.
Modbus Message Query
Address : The CPU master station Modbus address (in the range 0 -247).
Function Code : Modbus function code to read or write register, discrete or coil.
Data : Modbus data relating to the query message.
There is no need to include the CRC in the data field as the system
generates this automatically. There should be no spaces in the data field.
Controls
Send Query : Transmits the message to the master station.
Modbus Message Response
Address : The address of the responding system. It will match the query address.
Function Code : Modbus function code to read or write register, discrete or coil.
Data : Modbus data reply, without a CRC. There will be no spaces in the data
field.
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