We have some tags bound directly to a boolean in a symbolic siemens DB. Their configuration is about as simple as it gets:
We are now experiencing an issue where they at times randomly change state in ignition, without showing up in the audit log. These tags are never written by scripts either.
enable alarms and enable_innblander_1 went from true to false at 13:19
They now show as false in the tag browser
They show as True in the tia portal monitoring
They read as True in the OPC quick client:
Here is our tag group config:
The gateway is running ignition 8.3.4 b2026030309
Is this something anyone has experienced before? What can we do to fix this? It has happened a few times now. We first assumed it had something to do with restarting the gateway or changing the structure of the DB, but it doesn't seem like it.