I notice that any OpcUa application I use on our plant get frequent disconnections every few minutes. It happens with my Qt console application, with the OpcUaViewer example and even with another viewer I found online (I don't recall the name right now - I'll update the question!).
When the disconnection happens I catch the signals for errorChanged and stateChanged:
QOpcUaClient::ConnectionError
QOpcUaClient::Disconnected
Please note I have several variables with monitoring enable. Then I can successfully reconnect, but I wonder why this happens. The PLCs and the server are on the same wired LAN. It happens with different kind of machines (different manufacturer) but it happens with OpcUa only.
We have other machines on the same LAN that uses other TCP protocols and they don't have this issue. I guess it's not a networking problem, then.
Is there any timeout settings I need to tweak client side?