Honeywell 900 User Manual page 70

Main Menu
Diagnostics
Class Status
CPU POSITION CPU-A
CPU-B
CPU IS MISSING Reserve CPU is not
CPU GOOD
ADDRESS
ERROR
PREFETCH
ERROR
DATA ABORT
ERROR
S/W
INTERRUPT
ERR
UNDEFINED
INSTR ERROR
WATCHDOG
ERROR
VECTOR
ERROR
MEMORY GOOD
5 DAY BATTERY
WARNING
58
Possible Cause Controller Action
N/A Normal operation
N/A Normal operation
The lead controller
installed or not powered. will continue to
control the process,
but failover is not
CPU rack backplane
possible.
failure
N/A N/A
The reserved exception See PREFETCH
occurred for an unknown ERROR.
reason.
CPU failed when 1. Controller
attempting to fetch an
instruction from the
2. Associated rack
prefetch register.
3. SYSTEM
CPU failed when See PREFETCH
attempting to access ERROR.
data.
Software Interrupt that is See PREFETCH
not supported by the ERROR.
software occurred.
Bad Instruction Detected See PREFETCH
ERROR
Watchdog reset resulting 1. Associated rack
from software failure
2. SYSTEM
Corrupted interrupt Interrupt vectors
vectors in RAM. were restored.
N/A N/A
Estimated battery life is 1. Associated rack
less than 5 days.
2. SYSTEM
900 Control Station User Guide
Lead/Reserve CPU Diagnostics
g)
Install reserve CPU
Apply power to reserve CPU
Replace CPU rack backplane
Call Honeywell service
N/A
See PREFETCH ERROR.
1. Force a cold start.
performs a restart
2. Isolate system from noise and
force a cold start.
monitor block's
3. Replace CPU board.
RACK OK pin is
turned off.
MONITOR
block's HW OK
pin is turned off.
See PREFETCH ERROR.
See PREFETCH ERROR.
See PREFETCH ERROR.
1. Force a cold start.
monitor block's
2. Upgrade controller module
RACK OK pin is
software.
turned off.
3. Replace CPU board.
4. Contact Honeywell Personnel.
MONITOR
block's HW OK
pin is turned off.
See WATCHDOG ERROR.
N/A
Replace battery.
monitor block's
RACK OK pin is
turned off.
MONITOR
block's HW OK
pin is turned off.
Fix
Revision 9
May 2014