Table 23 Bad Module Details - Honeywell 900 User Manual

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Diagnostics
Bad module details
When an I/O module's error status is BAD MODULE, the module's status LED on the controller is flashed
red with a number of quick strobes followed by a long off time. Table 23 outlines the potential module
diagnostics.
Number of Fai l u re Descri p tion
Strobes
1 FAIL SAFE The module is in the failsafe state
because it is not receiving message
requests from the CPU or Scanner
at a rate that satisfies the configured
failsafe timeout.
2 EAROM EA ROM Failed its checksum
3 RAM
4 ROM
5 +24 V
6 FACTORY CAL CRC failure of primary and backup
factory calibration
7 FIELD CAL CRC failure of field calibration
values
8 HARDWARE General Hardware Failure
(AI=convertor not working)
9 HW/SW Key The software residing on the
module does not match the module
type. This diagnostic should only
result in the factory.
46

Table 23 Bad module details

AI AO DI DO
Contact AC DC Relay AC DC
√ √ √ √ √ √
√ √
√ √ √ √ √ √
√ √ √ √ √
√ √ √ √
√ √
√ √
√
√ √ √ √
900 Control Station User Guide
I/O Module Diagnostics and I/O Calibration
PFQ User Action
√ √ √ 1. If expansion I/O rack, go to step 2. If
no expansion I/O rack, go to step 3.
2. Check the Scanner status LED (see
Scanner Indicators in HC900
Process Controller manual, #51-52-
25-107).
If it's flashing 6 times, proceed
with step 3.
If it's flashing some other red
status code (refer to Scanner
Indicators in HC900 Process
Controller manual, #51-52-25-107)
to solve that problem first.
If it's flashing green, the module
probably is not required in the
configuration.
If it's not on or steady, cycle
power to the scanner.
3. Make sure the module is the correct
one for the configuration.
4. Remove the module and check for
a bent pin, then reinsert the module
5. Replace the module
6. Remove other modules and replace
one at a time until the problem
reoccurs. Most likely the last module
inserted needs to be replaced.
7.
Replace the rack.
1. Remove/reinsert module.
2. Replace module.
√ √ √
√ √
1. Remove the module and check
for a bent pin, then reinsert the
module
2. Measure power supply voltage. If
not correct, replace power supply.
3. Replace module
4. Replace rack
Replace module.
1. Remove/reinsert module.
2. Replace module.
Replace module.
√
Replace module
Revision 9
May 2014