Normal Powerup
A-4 Problem Solving
Normal Powerup
When the module’s power is initially turned on, the following events occur:
Event
Description
1
The Power LED lights and remains lit. The Port LEDs turn
orange. All other LEDs light and then turn off. This verifies
that the individual LEDs are operational.
2
The module initiates its built-in self-test. The seven-segment
display indicates the self-test status.
3
After the successful completion of self-test (approximately
two to five minutes), the Module OK LED lights and
remains on.
4
The remaining LEDs indicate their operational status, as
described in Table A-3.