Network variable stops sending

alexgooi — Wed, 22 Apr 2026 07:47:46 -0000

Hi Reinier,

What usually works for me is settings it up in the following way:
In the sender block make sure that the list identifier is unique for the whole installation (this is only relevant when you have multiple senders in 1 network).
When you are linking the NVL to a file make sure that the path to this file doesn't change. In my experience the NVL stops working when you change the working directory and afterwards open the NVL in de Codesys IDE.

If this doesn’t apply to you application, you could also try to change the port number, maybe there is an other process making use of port 1202.

Kind regards

Alex

Network variable stops sending

Reinier Geers — Mon, 20 Apr 2026 16:29:08 -0000

I use network variables. But when i change the programm, it wil stop sending.
Then is have to add or delete a variable. Then i will be compiled again and sends again. This problem wasw already in 9.20 but seems to be still in 21.0 . Is there a way to solve this ?

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