I have a system in which I am using the IOT2040 to communicate via MODBUS RTU 485 with 3 network analyzers. Periodically alternate I ask for the measured data. The communication works but the problem I'm having is that when I start the node-network everything works wonderfully but with the passage of time, the time of this communication begins to increase and always ends up failing for timeout. I increased the timeout and the only thing I achieved was that it takes longer to fail but the time it takes to read the data always increases and ends up failing.

Once it starts to fail and it does not read anything restart node-red or the flow and everything starts to work wonderfully.

What may be happening? Why does it increase the time it takes to read the data?

Top before and after to restart node-red

I have news.

I have a function after the Modbus Flex Getter to convert the data to another format and add a timestamp to it. I eliminated that function and 2 days ago that the communication is done correctly (read data in 1 second). So I'm going to have to refine my function and improve it.

I do not understand why that function affects the reading time in communication but that's it.

Thank you very much for your help.