Chapter 6 Slave Controller Specifications
6-5
(2) STATUS
Table 6.9 STATUS LED Specification
Display status
Description
Action to take
Lit in green
Normal operation
Lit in red
Internal microcomputer WDT
error
Turn the power supply off and then on again.
If the error persists, replace the module.
Flashing once in
red
I/O module error
The slot number is indicated by
the number of flashes in green.
Replace the faulty module.
Flashing twice in
red
I/O module not supported
Remove the module that is not supported.
Flashing three
times in red
Incorrect number of I/O points
Set the input/output data so that it is 256
words or less.
Flashing four times
or more in red
Module internal device error
Turn the power supply off and then on again.
If the error persists, replace the module.
Turned off
No power supply to the PLC.
Check that the specified voltage is supplied to
the power module of the PLC.