Honeywell 900 - Table 26 Details of Rack Diagnostics Error Status Messages

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Redundant Overview Diagnostics
Revision 9 900 Control Station User Guide 51
May 2014
Table 26 Details of Rack diagnostics error status messages
Item Status Possible Cause Controller Action Fix
CPU GOOD N/A N/A N/A
ADDRESS ERROR
The reserved
exception occurred for
an unknown reason.
See PREFETCH
ERROR.
See PREFETCH ERROR.
PREFETCH ERROR
CPU failed when
attempting to fetch an
instruction from the
prefetch register.
1. Controller
performs a restart
2. Associated rack
monitor block’s
RACK OK pin is
turned off.
3. SYSTEM
MONITOR
block’s HW OK
pin is turned off.
1. Force a cold start.
2. Isolate system from noise and
force a cold start.
3. Replace CPU board.
DATA ABORT
ERROR
CPU failed when
attempting to access
data.
See PREFETCH
ERROR.
See PREFETCH ERROR.
S/W INTERRUPT
ERR
Software Interrupt
occurred which is not
supported by the
software.
See PREFETCH
ERROR.
See PREFETCH ERROR.
UNDEFINED INSTR
ERROR
Bad Instruction
Detected
See PREFETCH
ERROR
See PREFETCH ERROR.
WATCHDOG
ERROR
Watchdog reset
resulting from software
failure
1. Associated rack
monitor block’s
RACK OK pin is
turned off.
2. SYSTEM
MONITOR
block’s HW OK
pin is turned off.
1. Force a cold start.
2. Upgrade controller module
software.
3. Replace CPU board.
4. Contact Honeywell Service.
VECTOR ERROR
Corrupted interrupt
vectors in RAM.
Interrupt vectors
were restored.
See WATCHDOG ERROR.
MEMORY GOOD N/A N/A N/A
5 DAY BATTERY
WARNING
Estimated battery life is
less than 5 days.
1. Associated rack
monitor block’s
RACK OK pin is
turned off.
2. SYSTEM
MONITOR
block’s HW OK
pin is turned off.
Replace battery.
LOW BATTERY Battery voltage is low.
1. Associated rack
monitor block’s
RACK OK pin is
turned off.
2. SYSTEM
MONITOR
block’s LOW
BATTERY pin is
turned on.
3. SYSTEM
MONITOR
block’s HW OK
pin is turned off.
Replace battery.