XSP Lockup?

[gcimmino]

I have an XSP connected via a DBH in the "out building". It and the other components out there have been working fine since install about 6 months ago.

A couple days ago, I received this message in the log:

117,Mon 6/2/2008,03:37,,1141 = EXPANSION MODULE TROUBLE,Serial Exp. 2

Exp. 1 is a XZW on another DBH in the main building.

We were out of town when this happened. I fired up RP remotely and running Enroll showed the XSP no longer there.

When we got back I opened up the can and the light on the XSP was on solid. Not sure what to do, I unplugged the XSP at the DBH, waited a few seconds and plugged it back in to reset it.

Via RP, I enrolled and all appears to be fine.

Any ideas what would have caused this?

Thanks

 

[Spanky]

There is a hardware watchdog in the M1XSP that should power down the processor and reset it if the hardware watchdog is not reset about every two seconds.

There is one of two things that could have happened:
1. The hardware watchdog is not working correctly.
2. A transient blasted the program into some weird program loop that was reseting the watchdog, but not executing the MAIN loop of the program. We try to write the program to not allow this.