Mitsubishi MELSEC QS Series, User Manual

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6
- 24 6.4 PLC memory initialization
6
FUNCTIONS
(5) Precautions
(a) PLC memory initialization when the CPU module error occurs
If the PLC memory is initialized when the errors like [INTERNAL CPU
COMMUNICATION ERROR] (error code: 8070 to 8074) occur, the
communication error may occur at the time of writing from the GX Developer to
the CPU module. Initialize the PLC memory after confirming that the above-
mentioned error does not occur.
For how to deal with [INTERNAL CPU COMMUNICATION ERROR] (error code:
8070 to 8074), refer to the error code list described in the QSCPU User's Manual
(Hardware Design, Maintenance and Inspection).
(b) Communication with GX Developer during PLC memory initialization
Online operation from GX Developer to the CPU module cannot be executed
during the PLC memory initialization.
Execute online operation from GX Developer after the PLC memory initialization
is completed.
Figure 6.10 PLC memory initialization procedure (continued)
During PLC memory initialization
1)
The "ALIVE" LED on the front of the CPU module
lights up and the other LEDs flash.
USER
TEST
Flashing ON
ALIVE
ERR. BAT.
PLC memory initialization completed
The "ALIVE" LED on the front of the CPU module
lights up and "ERR." LED flashes.
(For a battery error, the "BAT." LED lights up.)
USER
TEST
ON ON
ALIVE
RUN
ERR. BAT.
Flashing
End