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5.5.2 How to use file register R
The file register (R) consists of 16 bits as well as the data register (D).
Set the file register in the standard RAM of the QCPU or a memory card (SRAM
card and Flash card). The file register to be stored in the Flash card can be read
from the program only. The data cannot be changed with the program.
Program memory
Standard RAM
Standard ROM
Memory card
Stores parameters, programs, device
comments, and device initial values.
(File registers cannot be stored.)
Stores file registers of 1K to 4086K.
(The maximum number of storable file
registers depends on the memory card to be used.)
Stores file registers of 1K to 640K
(the capacity depends on the CPU type).
Stores parameters, programs, device
comments, and device initial values.
(File registers cannot be stored.)
The data in the file register remains after the reset operation or after the power is
turned off.
To clear the data, write 0 to the file register with the MOV(P) instruction or GX
Works2.
Use [Write to PLC] of GX Works2 or a sequence program to write data to the
standard RAM or SRAM card.
Use [Export to ROM Format] of GX Works 2 to copy data in the standard ROM
or Flash card.
Specify the area of the file register in 1K (1024 point) basis with the parameter.
Application Example
• Set 32K points of the file register R0 to R32767 to use in the program.
Follow the procedures below to register the file register to the parameter.
1) Double-click "Parameter" in the project list.
1) Double-click!
2) Double-click!
(To the next page)
2) "PLC Parameter", "Network Parameter", and
"Remote Password" are displayed.
Double-click "PLC Parameter"