Chapter 5 Program Configuration and Operation Method
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4) Data Latch Area Operation
The method to delete the latched data is as below.
- D.CLR switch operation of CPU module
- latch 1, latch 2 clear operation by XG5000
- write by Program (initialization program recommended)
- write ‘0’ FILL from XG5000 monitor mode.
D.CLR Clear does not operate in RUN mode. Convert to STOP mode to operate. Also when clearing by
D.CLR switch, bear in mind that general area shall be initialized.
When operating D.CLR momentarily, latch 1 area only shall be removed. If keeping D.CLR for 3
seconds, 6 LEDs shall be blinked and at this time, if returning the switch, even latch 2 area shall be
cleared.
For keep or reset (clear) operation of latch area data according to PLC operation, please refer to the below
table.
No.
Classification
Detailed operation
Latch 1
Latch 2
Remarks
1 Power
change
Off/On
Keep
Keep
Reset Keep
Keep
2 Reset
switch
Overall reset
Reset
Keep
Clear Latch 1
Reset
Keep
3
D.CLR switch
Clear Latch 2
Reset
Reset
4 Program
write
(online)
-
Keep
Keep
SRAM broken by battery error
Reset
Reset
5 Data
broken
Data broken by other reason
Reset
Reset
Clear Latch 1
Reset
Keep
6 XG5000
online
Clear Latch 2
Reset
Reset
5) Data Initialization
In case of Memory Delete state, the memory of all device shall be cleared as ‘0’. In case of giving the data
value at the beginning according to system, please use the initialization task.