Mitsubishi MELSEC System Q Manual page 30

The CPU Modules
Procedure to switch a PLC CPU from "STOP" to "RUN" after the program or parameters have
been changed during "STOP":
Switch the RESET/L.CLR switch to the "RESET" position.
Switch the RUN/STOP switch from "STOP" to "RUN".
However, when you want to set the CPU to "RUN" without clearing the device information:
Switch the RUN/STOP switch from "STOP" to "RUN
Switch the RUN/STOP switch back to "STOP"
Switch the RUN/STOP switch to "RUN".
– ERR. and USER LED
– BAT and BOOT LED
3 – 10
ON: After the detection of an error during self-diag-
nostics.This error will not stop operation.
OFF: Normal operation of the CPU
Flicker: An error that stops the operation has been
detected during self-diagnostic.
ON: An error has been detected by the CHK instruc-
tion or an annunciator (F) has been switched ON.
OFF: Normal operation of the CPU
Flicker: Execution of latch clear
ON: Voltage of either the battery for the CPU or the
memory card is too low.
OFF: Voltage is normal
ON: Start of boot operation
OFF: Boot operation is not being performed
The MELSEC System Q
MITSUBISHI ELECTRIC