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I have PLC V280-18-B20 and SCADA GE Cimplicity

I have a SW that monitores network assets and traffic, and it noticed (first time) that there was an attempt to communicate from the PLC to SCADA on port 56780
This is the first time that PLC initiates communication with the SCADA
And this is the first time I can see unitronics using port 56780.
The firewall dropped the session, but it looks suspicious to me,
Did anyone expirienced something like this? 

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  • MVP 2023

Posting your program would be helpful so we're not playing forum-question-pong.

You'll set up a port number for Modbus on the Vision side using the SOCK INIT block.

Then in the MODBUS IP config block you'll set the IP and the port number of the slave-


The slave port number can be whatever you want, but it has to match what you have defined in the slave.

Joe T>


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