I'm having some trouble with this exception lately in one of my data sources. Before, everytime I would modify a program in one of my PLCs, the error would appear ~10 times a day and eventually in some weeks it would stop by its own. The PLCs communicate with the server by RS485 and a RS485-USB adapter.

Yesterday I switched this adapter with a new one, and now the exception appears every 5 seconds. What is this problem? What can I do to solve it?

Thanks in advance!