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CHAPTER5 MEMORIES AND FILES USED FOR CPU MODULE
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5.1 Memories Used for CPU Module
5.1.4 Standard ROM
5.1.4 Standard ROM
(1) Definition
This memory is for storing data such as parameters and programs.
(2) Checking the memory capacity
Select [Online] [Read from PLC] in GX Developer.
1) Select "Standard ROM" in “Target memory” on the Read from PLC screen.
2) Click the button.
3) The memory capacity appears in “Total free space volume”.
(3) Writing to the standard ROM
Select [Online] [Write to PLC] in GX Developer.
Select "Standard ROM" in “Target memory”.
The file size has its minimum unit. ( Section 5.3.4)
The occupied memory capacity may be greater than the actual file size.
Note that as the number of files increases, the difference between the occupied memory capacity
and the actual file size increases.
Figure 5.8 Procedure for checking the memory capacity
Free space volume
1) Select the target memory.
2) Click the
Free space volume button.
3) The memory capacity
value is shown.