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9 TROUBLESHOOTING
9.7 Troubleshooting for Each Symptom
PLC write, PLC read
PLC write cannot be performed
If data cannot be written to the CPU module from the engineering tool, check the following items.
If writing still cannot be performed even after the items shown above are checked, there may be a hardware issue. Consult
your local Mitsubishi Electric representative.
Reading from the PLC cannot be performed
If data cannot be read from the CPU module to the engineering tool, check the specification of the target memory to be read.
Check the memory and reset the CPU module. Then try PLC read again.
If reading still cannot be performed, there may be a hardware issue. Consult your local Mitsubishi Electric representative.
The program is unintentionally overwritten
The boot operation may be being performed. Read the parameters and review the boot file settings with the engineering tool.
If the boot operation is not being performed, there may be a hardware issue. Consult your local Mitsubishi Electric
representative.
For details on the boot operation, refer to
MELSEC iQ-F FX5 User's Manual (Application).
Boot operation
Boot operation cannot be performed from the SD memory card
If the boot operation cannot be performed even after the items shown above are checked, there may be a hardware issue.
Consult your local Mitsubishi Electric representative.
Item to check
Action
Check if a password is not registered.
Authenticate a password using the engineering tool.
When an SD memory card is the write destination, check that the write
protection is not applied to the card.
Remove the write protection from the SD memory card.
When an SD memory card is the write destination, check that the card is
formatted.
Format the SD memory card.
Check that the size of the write data does not exceed the memory capacity.
• Ensure sufficient empty capacity.
• Clear the memory to which the data is to be written.
Item to check
Action
Check for errors in the CPU module.
Remove the cause of the error.
Check that the file is set in the boot file settings of the parameters.
Set the file in the parameters.
Check that the file is set in the program file settings of the parameters.
Check that the file to run is stored in the SD memory card.
Store the file to run.
Summary of Contents for MELSEC iQ-F FX5UC-32MT/D
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