We are using Allen Bradley Logix Driver, and Allen Bradley PLC5 Driver connect to PLCs.
In Ignition Version 8.1.3 and below, We use [Diagnostics] tags “Is Connected” as indicator of device connection. When PLC is not connected, the value is 0.
Recently we upgraded to Ignition 8.1.9, we realized that the connection tag is changed to [Diagnostic]\Connected.
For the driver of PLC5, the connection tag is still behave as same as previous, eg. 1 for connected, 0 for disconnect.
The problem is on Logix Driver, when ControlLogix PLC is disconnected, the tag is no value and the tag quality is “Uncertain-Initial Value”.
Is this a bug in upgraded Logix Driver?
Is it possible to load back the previous version of Allen Bradley Logix Driver?