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5.2 High Performance Model QCPU, Process CPU and Redundant CPU
5.2.4 Standard RAM
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MEMORIES AND FILES HANDLED BY CPU MODULE
5.2.4 Standard RAM
(1) Definition of standard RAM
The standard RAM is provided to use file registers and local devices without
installation of a memory card.
The standard RAM used as file registers allows fast access like the data registers.
(2) Storable data
The standard RAM can store one file register file and one local device file (a total of
two files).
Refer to Section 5.2.1(2) for the list of data that can be stored into each memory.
POINT
If the volume of the file registers to be stored into the standard RAM exceeds the
standard RAM capacity, examine the following.
1. Store the file registers onto a memory card.
2. Reduce the file register points.
However, note that in the case of 1. above, access speed will be lower than that of
the standard RAM.
(3) Before using the standard RAM
Before using the standard RAM, be sure to format it by GX Developer.
(a) Formatting
To format the standard RAM, choose [Online] [Format PLC memory] on GX
Developer, and select "Standard RAM" as the target memory.
Diagram 5.18 Standard RAM formatting
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