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4.3 High Performance Model QCPU, Process CPU and Redundant CPU
4.3.3 Reset Operation
4
HARDWARE SPECIFICATIONS OF THE CPU MODULE
POINT
1. Before writing a program to the CPU module, perform the following operation.
• Set the system protect setting switch (DIP switch:SW1) of the CPU
module to OFF (not protected).
• Cancel the registered password on GX Developer.
2. When the CPU module is placed in the STOP status by the remote STOP
operation of GX Developer, it can be put in the RUN status by the remote
RUN operation of GX Developer after program write. In that case, No
operation is needed for the RUN/STOP switch and RESET/L.CLR switch of
the CPU module.
For details of GX Developer, refer to the manual below.
GX Developer Operating Manual
4.3.3 Reset Operation
Reset operation is performed by turning the RESET/L.CLR switch of the CPU module to
the RESET side for the High Performance model QCPU, Process CPU and Redundant
CPU.
POINT
Be sure to return the RESET/L.CLR switch to the neutral position after resetting.
When the system is left with the RESET/L.CLR switch set to the RESET, the
entire system is reset, not operating normally.
4.3.4 Latch Clear Operation
To perform latch clear, operate the RESET/L.CLR switch in the following procedure.
1) RUN/STOP switch : STOP
2) RESET/L.CLR switch : Move the switch to L.CLR several times until the
"USER" LED flickers.
"USER" LED: Flicker : Ready for latch clear
3) RESET/L.CLR switch : Move the switch to L.CLR once more.
"USER" LED: OFF : Latch clear complete
POINT
1. The valid/invalid for latch clear in the clear range of latch clear operation can
be set for each device. The setting can be mode in the device setting of the
PLC parameter.
2. In addition to the way of using the RESET/L.CLR switch for latch clear,
remote latch clear may be performed from GX Developer.
For details of remote latch clear operation by GX Developer, refer to the
manual below.
QCPU User's Manual (Functional Description, Program Fundamentals)
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