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CHAPTER5 MEMORIES AND FILES USED FOR CPU MODULE
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5.2 Memo
ries Used fo
r High Perfor
mance
model QC
PU, Process CPU
, and Redu
ndant CPU
5.2.4 Sta
ndard R
A
M
5.2.4 Standard RAM
(1) Definition
This memory is for using file registers, local devices, and sampling trace files without a memory card.
Storing the file registers in the standard RAM allows fast access as data registers do.
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If the size of files to be stored exceeds the standard RAM capacity:
• store the files in the memory card, or
• reduce the number of points of the file register, local device, or sampling trace.
Note when file registers are stored in the memory card, the access speed will be slower than when they are stored in
the standard RAM.
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Before storing a sampling trace file to the standard RAM, check the versions of the CPU module and GX Developer.
(
(2) Before using the standard RAM
Format the standard RAM by GX Developer.
(a) Formatting
Select [Online] [Format PLC memory] in GX Developer.
Select "Standard RAM" in "Target memory".
Figure 5.18 Formatting the standard RAM
