Revision 10 ControlEdge HC900 Process & Safety Controller User and Installation Manual 203
May 2019
I/O Module Diagnostic Indication
To indicate the type of diagnostic failure, the module’s status LED is flashed red with a number of quick
strobes followed by a long off time. Table 33 outlines the potential module diagnostics.
Hazardous voltages exist at terminal blocks.
AO8 and AO16 modules require at least one channel to be configured prior to a cold start for the module
to work properly. Subsequent channels then may be added with a hot start.
Failure to comply with these instructions could result in death or serious injury.
Table 33 – I/O Module LED Diagnostics
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 p. 191).
If it’s flashing 6 times,
proceed with step 3.
If it’s flashing some other
red status code, refer to
Table 31 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.
To Next Page
Loading...
