Flowchart For When The Err Terminal (Negative Logic) Is Off (Opened) - Mitsubishi MELSEC User Manual

12
TROUBLESHOOTING

12.2.2 Flowchart for when the ERR terminal (negative logic) is off (opened)

The following shows the flowchart for when the "ERR terminal" is off (opened) at power-on
or during operation of the PLC.
Remove the corresponding power
supply module, and mount it to the
normal base unit.
(Do not mount any modules other
than the power supply module.)
Mount the corresponding power
supply module to the original base
unit again, and remove all modules
other than the power supply module
from the base unit.
The ERR terminal has
turned off (opened).
How is the "ERR."
LED of the CPU
module?
Not flashing
Is power supplied?
Is the power supply
voltage proper?
YES
How is the "ALIVE"
LED of the CPU
module?
Off
How is the "POWER" LED
of the power supply
module?
On
(To next page)
12.2.2 Flowchart for when the ERR terminal (negative logic) is off (opened)
Flashing (CPU
module is in stop
Conduct PLC diagnostics with GX
error)
Developer to check error details and take
action according to the details.
NO
Supply power of proper voltage.
On
Off
The corresponding power supply module is
faulty
(Replace it with a normal power supply
module).
12.2 Troubleshooting Flowchart
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