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CHAPTER5 MEMORIES AND FILES USED FOR CPU MODULE
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5.2 Memories Used for High Performance model QCPU, Process CPU, and Redundant CPU
5.2.10 Specifying valid parameters (parameter-valid drive setting)
(b) Date and time
The date and time when a file was written to the CPU module is shown.
The date and time are appended according to the clock set on the GX Developer (personal computer) side.
(c) Size
The file size when the file was written from GX Developer to the CPU module is shown in units of bytes (To
display the latest data, select [Online] [Read from PLC] and click the button). At least 64
bytes (136 bytes for a program) are added to the file created by an user except a file register file. (
Section 5.4.3)
5.2.10Specifying valid parameters (parameter-valid drive setting)
The drive (memory) storing parameters to be valid can be selected with the DIP switches on the CPU module.
(1) Selection method of parameter-valid drive
Select the drive with the DIP switches (SW2 and SW3).
(2) When to determine valid parameters
The CPU module determines whether to validate the parameters when:
• the CPU module is powered off and then on, or
• it is reset.
The CPU module automatically enables parameters stored in the drive set with SW2 and SW3 at the above
timing and operates by the parameter settings.
Table5.8 Drive specification with SW2 and SW3
SW2 SW3 Parameter-valid drive
Off Off Drive 0 (program memory)
On Off Drive 1 (memory card RAM)
Off On Drive 2 (memory card ROM)
On On Drive 4 (standard ROM)
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