Honeywell HC900 Manual Do Utilizador
Diagnostics and Troubleshooting - User Interface
Revision 5
HC900 Hybrid Controller Installation and User Guide
137
9/03
Table 30 - Scanner Diagnostics
Diagnostic
Condition
Condition
Number
of
Strobes
of
Strobes
Possible Cause
Scanner Action User
Action
Watchdog Reset
3
Watchdog reset resulting from
software failure
software failure
Scanner restarts and
requests configuration
from the main CPU.
requests configuration
from the main CPU.
1. Cycle power to the scanner
2. Upgrade scanner software
3. Replace scanner module
4. Contact Honeywell Personnel.
Prefetch abort
CPU exception
CPU exception
3
CPU failed when attempting to
fetch an instruction from the
prefetch register.
fetch an instruction from the
prefetch register.
See watchdog reset
1. Cycle power to the scanner
2. Isolate system from noise and
cycle power to the scanner
3. Replace scanner module
Address error
CPU exception
CPU exception
3
The reserved exception
occurred for an unknown
reason.
occurred for an unknown
reason.
See watchdog reset
See Prefetch abort CPU
exception
exception
Undefine
instruction CPU
exception
instruction CPU
exception
3
Bad Instruction Detected
See watchdog reset
See Prefetch abort CPU
exception
exception
Data abort CPU
exception
exception
3
CPU failed when attempting to
access data.
access data.
See watchdog reset
See Prefetch abort CPU
exception
exception
Software interrupt
exception
exception
3
Spurious Interrupt
See watchdog reset
See Prefetch abort CPU
exception
exception
Vector error
3
Interrupt vectors in RAM were
corrupted
corrupted
Interrupt vectors were
restored
restored
See Watchdog reset
Flash write error
4
Flash failed to burn properly.
The boot code is the
only software running.
This software waits
for a request to burn
the flash. It does no
scanning of modules.
Modules remain in
their failsafe state.
only software running.
This software waits
for a request to burn
the flash. It does no
scanning of modules.
Modules remain in
their failsafe state.
Do a code download.
Rack backplane
failure
failure
6
The Scanner is unable to
successfully communicate to
any modules that are in its SPI
backplane.
successfully communicate to
any modules that are in its SPI
backplane.
Does no scanning of
modules. Modules
remain in their failsafe
state.
modules. Modules
remain in their failsafe
state.
1. Remove modules and check
for bent pins on connectors.
2. Reinsert modules one at a time
and note which module the
diagnostic reoccurs, and
replace that module.
diagnostic reoccurs, and
replace that module.
3. Cycle power to the rack.
4. Replace the power supply.
5. Replace the rack.
6. Replace the scanner module.