Driver Error ST143

[Bobby]

Not really sure how to research what this error is actually for. It is just a warning and does not seem too effect my program but I would prefer to get rid of it

[BobO]

It's a warning that gets set any time a device-centric instruction ends on error. Could be as simple as a Modbus comm error or a failed email.

I'm a little puzzled though...pretty much every place we set it, we also set the error string so that you know what the specific error was. If you really don't want to see it, just clear it from ladder code.

[Saturn_Europa1]

I am getting this same error.  What is a device-centric instruction?

[MikeS]

Device-centric instructions all have a device driver that handles access to a shared resource in the CPU (memory, ports, etc.). 

ST143 will be ON if any device driver is reporting a runtime error, the most common cause is the On Error indication of a multi-scan instruction is ON. Use the System Status tab of the System Info utility to locate the instruction that is reporting the error.