MODBUS lag, port locked and timeout


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We have been using the DAQ factory for a while and keep getting occasions when the software freezes.  I started looking at this today and found that there are repeated errors (see image).  I am completely new to this software as my colleague built it and is unsure what the problem is.  I see errors P-ModbusTCP with numbers after but i cant relate that to a particular device and C1038 Timing lag and i dont know what that is either.

I have a full licence.

can anyone help?  Give pointers as to why we are seeing this?


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