Program Memory - Mitsubishi MELSEC QS Series User Manual

5
MEMORIES AND FILES HANDLED BY CPU MODULE

5.1.2 Program memory

(1) Definition of program memory
The program memory stores the program used by the CPU module to perform
operation.
The program stored in the standard ROM is booted (read) to the program memory to
perform operation.
(2) Storable data
The program memory can store parameters, programs, device comments, and user
setting system area data.
Refer to Section 5.1.1 (2) for the list of data that can be stored into program memory.
POINT
(3) Before using the program memory
Before using the program memory, be sure to format it by GX Developer.
(a) Formatting
If the total volume of the data to be stored into the program memory exceeds its
capacity, examine reducing the user setting system area data.
When formatting, display the PLC memory format screen with GX Developer
[Online] [Format PLC memory]. This is done selecting "Program memory/
Device memory" as the target memory on the PLC memory format screen.
Diagram 5.2 Program memory formatting
5.1 Memories by CPU Module
5.1.2 Program memory
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