
4. AnSHCPU MODULE
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MELSEC-A
4.4.4
Clearing latched data
Follow the procedure described below to clear latched data using the RUN/STOP
key switch. The latch clear operation also clears unlatched device data.
(1)
Turn the RUN/STOP key switch from the "STOP" position to the "L.CLR"
position several times to make the "RUN" LED flash quickly (ON for
approximately 0.2 seconds and OFF for approximately 0.2 seconds). The
quickly flashing "RUN" LED indicates that the preparation for the latch clear
operation is completed.
(2)
Turn the RUN/STOP key switch from the "STOP" position to the "L.CLR"
position again while the "RUN" LED is flashing. The latched data will be
cleared, and the "RUN" LED will go OFF.
To cancel the latch clear operation, turn the RUN/STOP key switch to the
"RUN" position to make the AnSCPU start processing, or to the "RESET"
position to reset the AnSCPU.
REMARK
Latched data can be cleared using the GPP function.
The A6GPP, for example, performs latch clear using "DEVICE MEMORYALL CLEAR" of the test
functions of the PLC mode.
See the GPP Operating Manual for details.
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