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Built in IO tags for Micro 850 PLCs

Are there any "built in" (system) tags/registers in a Micro 850 that we can read to confirm communications?

There are a few I/O tags that correspond to the PLC's native I/O. The screenshot below highlights these tags, which you can use to identify a 'Good' quality tag.
 

Note: This is dependent on your Micro800 PLC model. The screenshot below reflects the native IO addresses for a Micro850 (2080-LC50-24AWB)

 
 4125 - Micro850Tags