User`s manual

Troubleshooting Troubleshooting
MELSEC System Q, Hardware 11 – 17
11.2.17 When unable to write a program into the CPU module
RUN/STOP switch in
STOP position?
A program cannot be written
into the CPU module.
YES
RUN/STOP switch -> STOP
Can a program be written?
STOP
RUN
 Confirm whether the write-
protect switch is off or not.
 Confirm if it is formatted.
 Confirm the writing destination
specification.
Has the password
registered?
YES
YES
Completed
NO
YES
Cancel the password
Is the Dip switch SW1
set to OFF?
NO
NO
Transfer to which memory?
Memory card
NO
YES
NO
YES
Turn the DIP switch SW1 (system
protect) to OFF.
NO
YES
Program memory
 Organize file.
 Confirm memory space.
 Confirm the writing destination
specification.
Completed
Format program memory.
Completed
Please consult your local Mitsubishi
service center or representative.
Can a program be written?
Can a program be written?
Can a program be
written?
Can a program be
written?
Can a program be written?