Hi,

some of our customers report that the state of Nodes changes to ‘Bad’ after a certain amount of inactivity (between 15 and 30 minutes).

The general setup is like this, our machine has an OPC UA Server with a couple Nodes (around 100), most of those will only get updated infrequently, some even only once during the startup of the server, as it is essentially static data.

Our customers use a Kepware Client to connect and monitor the Nodes and report that after a certain amount of time (they say between 15 and 30 minutes without changing data) all Nodes are reported as state ‘Bad’.

The question now is if you have any experience with this kind of behavior and have an idea what might cause it? Is there something we can or should do on the server side to force a ‘Good’ state of the nodes? Or do you suspect it to be a quirk of the client?

We could not see this behavior using the Prosys Test Client which we used for initial tests of the Server Implementation.

Greetings
Patrick Kottmeyer