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Take a look at OSCAT Network. They have a codesys download for V2.3 http://www.oscat.de/
Their lib is open source, so you can either use their premade blocks, or look internally at their implementation.
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Thank you, I took a look. But not exactly matching, since they propose to use two blocks of NET_VAR on both sides, of PLC. However I will use gateway with UDP packet forwarder connected to PLC. I believe I needed to specify from beginning what is needed.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I try to work with UDP packets in Codesys V2. Which is the best library to use for reading and writing UDP packets ?
Take a look at OSCAT Network. They have a codesys download for V2.3
http://www.oscat.de/
Their lib is open source, so you can either use their premade blocks, or look internally at their implementation.
Thank you, I took a look. But not exactly matching, since they propose to use two blocks of NET_VAR on both sides, of PLC. However I will use gateway with UDP packet forwarder connected to PLC. I believe I needed to specify from beginning what is needed.