Honeywell 900 User Manual page 50

Main Menu
Diagnostics
Item Status
CPU Status GOOD
WATCHDOG
ERROR
PREFETCH
ERROR
ADDRESS ERROR The reserved
UNDEFINED
INSTR ERROR
DATA ABORT
ERROR
S/W INTERRUPT
ERR
VECTOR ERROR
Memory GOOD
Status
5 DAY BATTERY
WARNING
LOW BATTERY
FLASH ERROR
I/O Status GOOD
38
Possible Cause Controller Action
N/A N/A
Watchdog reset 1. Associated rack monitor
resulting from block's RACK OK pin is
software failure turned off.
2. SYSTEM MONITOR
block's HW OK pin is
turned off.
CPU failed when 1. Controller performs a
attempting to fetch an restart
instruction from the
2. Associated rack monitor
prefetch register.
block's RACK OK pin is
turned off.
3. SYSTEM MONITOR
block's HW OK pin is
turned off.
See PREFETCH ERROR. See PREFETCH ERROR.
exception occurred for
an unknown reason.
Bad Instruction See PREFETCH ERROR
Detected
CPU failed when See PREFETCH ERROR. See PREFETCH ERROR.
attempting to access
data.
Software Interrupt
See PREFETCH ERROR. See PREFETCH ERROR.
occurred which is not
supported by the
software.
Corrupted interrupt
Interrupt vectors were
vectors in RAM.
restored.
N/A N/A
Estimated battery life 1. Associated rack monitor
is less than 5 days. block's RACK OK pin is
turned off.
2. SYSTEM MONITOR
block's HW OK pin is
turned off.
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.
1. Associated rack monitor
Flash failed to burn
block's RACK OK pin is
turned off.
2. SYSTEM MONITOR
block's HW OK pin is
turned off.
N/A N/A
900 Control Station User Guide
Controller Diagnostics
What to do
N/A
1. Force a cold start.
2. Upgrade controller module software.
3. Replace CPU board.
4. Contact Honeywell Personnel.
1. Force a cold start.
2. Isolate system from noise and force
a cold start.
3. Replace CPU board.
See PREFETCH ERROR.
See WATCHDOG ERROR.
N/A
Replace battery.
Replace battery.
1. Force a cold start.
2. Replace CPU board.
N/A
Revision 9
May 2014