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MELSOFT
7 MANAGEMENT OF DATA IN THE PLC CPU
7.4.3 Clearing the PLC memory
Clear all device memory of the QCPU (Q mode) or QnACPU.
This function is invalid for flash ROM.
Note that this function is enabled in the STOP or PAUSE mode of the PLC CPU.
Perform this function after placing the PLC CPU in the STOP/PAUSE status with the
PLC CPU switch or by performing remote operation (refer to Section 7.4.2).
Click the Clear PLC memory
button in the Delete PLC data dialog box.
1)
2)
4)
3)
No. Item Description
1) Connection target information Shows the information of the specified PLC CPU.
2) Clear all device memory
When this check box is checked to select it, the device memory is all-cleared.
You can set whether or not the devices designated in latch range designation
are cleared.
3) Clear all file registers
Sets all file register data to "0."
The area and file names are not cleared.
To designate a file, designate the applicable memory and the file name.
4)
Execute
button
Click this button after setting the necessary settings.
POINT
• If the latched range is included in the device memory all clear operation, the latch
clear key invalid area is also cleared.
• All clear is not possible when the PLC is in the RUN state.