MICRO 830 Monitor for major error

Hardware:
Micro 830 2080-LC30-24QWB
PVc: 2711C-T4T Firmware 1.8
CCW V6.01.00 Standard Edition
Comms: CIP Serial RS232

I have to display on the HMI when there is a major PLC error.
In my PLC program I monitor the system variable _SYSVA_MAJ_ERR_HALT and use it to set global BOOL variable called PLC_ERROR, however when I create a major error by dividing by 0 and causing a major error the PLC does not update the PLC_ERROR variable so the HMI does not see it..Hmm what to do? The HMI wont let me directly map to a system variable either. Anybody know of a work around?

Thanks

can you create a heartbeat between plc's that reset each other?
when the plc has a major fault, it will not reset the bit.
start a timer and when the bit is true - 20 or 30 seconds.
if the bit is not reset within the time limit, something it wrong, either comms or plc problem.

hope this helps.
james