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MELSOFT
7 MANAGEMENT OF DATA IN THE PLC CPU
7.4.5 Arranging the PLC memory
Arrange the data in the program memory or memory card of the QCPU (Q mode) or
the built-in RAM or IC memory card of the QnACPU to reserve a consecutive free
space.
This function is invalid for flash ROM.
Note that this function is enabled in the STOP mode of the PLC CPU.
Perform this function after placing the PLC CPU in the STOP status with the PLC CPU
switch or by performing remote operation (refer to Section 7.4.2).
Click the Arrange PLC memory
button in the Delete PLC data dialog box.
1)
3)
2)
No. Item Description
1) Connection target information Shows the information of the specified PLC CPU.
2) Target memory Sets the PLC memory that is to be sorted.
3)
Execute button
Click this button after setting the necessary settings.
POINT
The following indicates an example of arranging the PLC Memory.
28K
Program A
8K
Program B
6K
Program C
6K
Free area
8K
Program B
deleted
Program A
8K
Program C
6K
Free area
8K
Free area
6K
Program A
8K
Program C
6K
Free area
14K
8K
8K
Total free capacity
Max. contiguous free
area
14K
8K
Total free capacity
Max. contiguous free
area
14K
14
K
Total free capacity
Max. contiguous free
ca
p
acit
y
PC
memory
sort
In the following cases, the PLC Memory cannot be arranged.
• The drive memory is faulty.
• One file is not stored in one continuous area.