Self-Diagnostics Test - Mitsubishi Electric MELSEC iQ-R C User Manual

3.4

Self-Diagnostics Test

Automatic hardware test
Tests related to the hardware such as ROM, RAM, and Ethernet of a C intelligent function module are performed.
• The value of buffer memory cannot be referred in an engineering tool during the automatic hardware test.
• During the automatic hardware test, do not change the operating status of a CPU module. Otherwise, the
module major error (2442H) occurs in the CPU module.
Operating procedure
1.
Select "Automatic hardware test" in [Basic Settings]  [Various Operations Settings]  [Mode Settings] in the module
parameter of the C intelligent function module in the parameter setting of an engineering tool.
2.
Disconnect a cable if it is connected to a 1000BASE-T/100BASE-TX/10BASE-T interface.
3.
Remove an SD memory card if it is inserted.
4.
Set the CPU module to the STOP state, and write the parameters.
5.
Reset the CPU module.
6.
After resetting the CPU module, the automatic hardware test is performed.
The LED display when performing the automatic hardware test is as follows:
Status
Automatic hardware test is in process.
Automatic hardware test is complete.
7.
When the test completed normally, select "Online" in [Basic Settings]  [Various Operations Settings]  [Mode Settings]
in the module parameter of the C intelligent function module in the parameter setting of an engineering tool to reset the
CPU module.
8.
At an abnormal completion, check whether measures are taken to reduce noise of the programmable controller system
and execute the automatic hardware test again. If the process is completed abnormally again, there may be a hardware
failure in the C intelligent function module. Please consult your local Mitsubishi representative. While removing the
module, do not use an electric screwdriver. Remove the module when the module fixing screws are in fully loosened
state.
3 TROUBLESHOOTING
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3.4 Self-Diagnostics Test
RUN LED status
Flashing (low-speed)
Normal completion ON
Abnormal completion ON
ERR LED status
OFF
OFF
ON