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You need to write application and modify your PLC project. There is many ways to do that.   

The best way depends on your specific requirements.

 

I have similar server application that distributes data from SQL across hundreds of V-570 PLC's: each controller connects to the server on port 20257 once per 5 min, provide his ID and receives relevant data.

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You need to write application and modify your PLC project. There is many ways to do that.   

The best way depends on your specific requirements.

 

I have similar server application that distributes data from SQL across hundreds of V-570 PLC's: each controller connects to the server on port 20257 once per 5 min, provide his ID and receives relevant data.

That sounds like what I am trying to do.  Can you give me more details about how you did this?  Does the database send data to the PLC via PCOM?

Do you have an example you can send me? - Thanks!

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Here is tiny server application (C#2008) which is stays on public IP, connected to SQL and distributes data between hundreds of PLC'c:

https://dl.dropboxusercontent.com/u/61256880/Unitronics/VL_Connect.7z

 

This link to Visilogic subroutine that actually executes PLC client function:

https://dl.dropboxusercontent.com/u/61256880/Unitronics/GetPortNumber.7z

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