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Chapter 8. TROUBLESHOOTING
8 - 2
8.2 Troubleshooting Procedure
8.2.1 LED I ndication I s I ncorrect
LED abnormal
Is the PWR LED
turned on?
Is voltage of the
power supply
module normal?
HW Fault
Check the power supply
module and replace it.
Is ERR LED
on?
Is normal other
modules onto their
slots?
HW Fault
HW fault of the other
modules loaded onto
their slots.
Is the ERR LED
flickering?
Is data formatting
signal on?
No changes of ERR
Check the initial values
setting values and out
data, and correct the
program.
HW Fault
HW Fault
Yes
No
No
Yes
Yes
No
No
Yes
Yes
No
No
Yes