After getting the code back up and running I replaced the dust monitor that quit communicating with the corner station with  one provided by Patrick.  The New one is working just fine.

This took far longer than planned.  I was working on it yesterday only to find out that the code had been stopped so all the work yesterday was repeated this morning.  Then realized no one had tried the basic swap of monitors so this was the logical step for testing.  Once replaced I booted the comtroler again and Patrick restarted the code.  Everything appears to be working now.