Self-Loopback Test - Mitsubishi Electric MELSEC Q Series User Manual

6.7

Self-loopback Test

This test checks whether the module alone operates normally or not.
Follow the steps shown below.
[Test results]
When normal
When faulty
*1
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Connect cables and supply 24VDC through a
dedicated power supply or a power supply adapter.
After checking the following items, power on
the system.
Modules are correctly installed.
A voltage is applied from the power supply.
The CPU module is in the STOP status.
The CPU module is in the RESET status.
To set a test mode, turn on SW8, operation
setting switch of the QJ61CL12.
LED indication
RUN ERR. SD
ON OFF *1
ON OFF OFF
OFF OFF OFF
ON ON OFF
Dimly lights or is flashing.
search engine
Start
Power on the system.
Reset the CPU module.
End
RD L RUN L ERR.
*1 ON OFF
OFF OFF ON
OFF OFF OFF
OFF OFF OFF
Action
⎯
The hardware is faulty. Replace the module.
Correct the operation setting switch
configuration.