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(3) Clearing the file register
The data in the file register is held even if the CPU module is powered off or is reset.
(File register data cannot be cleared by latch clear.)
To clear file register data, perform data clear by sequence program or GX Developer.
(a) When clearing by the sequence program
(b) When clearing by GX Developer
Select [Online] [Clear PLC memory] in GX Developer and clear the data by selecting "Clear all file registers".
9.7.1 File register data storage location
The file register data are stored in the following memories.
• Basic model QCPU:
Standard RAM
• High Performance model QCPU, Process CPU, and Redundant CPU:
Standard RAM, SRAM card, or Flash card
9.7.2 File register size
(1) When using the standard RAM
The table below shows the maximum points of file register data that can be stored in the standard RAM.
Note that, however, if the standard RAM is used for an application other than file registers, available points are
decreased. ( Section 5.1.1,Section 5.2.1)
*1: Since the standard RAM size varies by CPU module version, the number of available points is different. ( Appendix
2.2)
Figure 9.73 Example of clearing the file register R0 to R999
Table9.10 File register size
CPU module Points
Basic model QCPU Q00CPU, Q01CPU 64K
High Performance model QCPU
*1
Q02CPU 32K
Q02HCPU, Q06HCPU 64K
Q12HCPU, Q25HCPU 128K
Process CPU
Q02PHCPU, Q06PHCPU 64K
Q12PHCPU, Q25PHCPU 128K
Redundant CPU Q12PRHCPU, Q25PRHCPU 128K
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