OPC tag shows Null

General Discussion
1

v7.9.10

Pulling in a tag from a PLC5. Tag in the browser has a question mark and the value is Null. Its a float (F8:5), non zero value.

Thanks!

2

Just a follow up. I could not figure out what the issue was and didn't get any help here. Using quick client, the tag values were good, just the tag browser they were showing 'null'.

I rebooted the Ignition server VM. The tags are working correctly now.

3

Do you know what was the status of the device in Ignition?

One issue, with SLC driver, is that the device connection is stuck at the status "Disconnected: browse pending", and do not reconnect. I don't know the cause, but I have a scheduled script that disable, then re-enable the device, when the status match.