APPX
Appendix 3 Troubleshooting by Symptom
801
A
When data cannot be written to the programmable controller
Check the following:
If data cannot be written to the programmable controller even after the items above are checked and the actions are taken, the
possible cause is a hardware failure. Please consult your local Mitsubishi representative.
When data cannot be read from the programmable controller
Check the following:
If data cannot be read from the programmable controller even after the items above are checked and the actions are taken,
the possible cause is a hardware failure. Please consult your local Mitsubishi representative.
When the operating status of the CPU module cannot be changed
Check the following:
If the CPU module operating status cannot be changed even after the items above are checked and the actions are taken, the
possible cause is a hardware failure. Please consult your local Mitsubishi representative.
When the Ethernet function cannot be used
For troubleshooting, refer to the following:
MELSEC iQ-R Ethernet User's Manual (Application)
When the CC-Link IE Field Network Basic function cannot be
used
For troubleshooting, refer to the following:
CC-Link IE Field Network Basic Reference Manual
Check item Action
Check if password is not registered. Authenticate a password using the engineering tool.
Check if the SD memory card is write-protected while the SD memory card is
being targeted for writing.
Clear the write-protect for the SD memory card.
Check if the SD memory card is formatted while the SD memory card is being
targeted for writing.
Carry out formatting for the SD memory card.
Check if the data to be written exceeds the capacity of CPU built-in memory or
SD memory card.
Check the CPU built-in memory or SD memory card for their free space.
Check if a password has been set for the programmable controller. Write user information to the programmable controller from the engineering
tool.
Check if the user has logged on to the programmable controller. Log on to the programmable controller from the engineering tool.
Check item Action
Check if password is not registered. Authenticate a password using the engineering tool.
Check if the target memory to be read is correctly specified. Check the read target memory (CPU built-in memory, SD memory card, or
intelligent function module).
Check if a password has been set for the programmable controller. Write user information to the programmable controller from the engineering
tool.
Check if the user has logged on to the programmable controller. Log on to the programmable controller from the engineering tool.
Check if program restoration information has not been written. When program restoration information has not been written, data cannot be
read from the programmable controller. When writing data to the
programmable controller, write program restoration information.
Check item Action
Check if a stop error has been occurred. Check the error cause using an engineering tool and eliminate the error
cause.
Check if the online change processing is left suspended. Execute the online change again.
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