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6.4 PLC memory initialization

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

The "ALIVE" LED on the front of the CPU module

lights up and the other LEDs flash.

USER

TEST

FlashingON

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

ONON

ALIVE

RUN

ERR.

BAT.

Flashing

End

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