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Memory Capacity Setting - Mitsubishi Electric MELSEC-A Series User Manual

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4.A2CCPU
- - - - - - - - - - - - - - - - - - - - MELSEC-A
I
4.4.1
Memory capacity setting
(1)
The A2C provides 32K byte user memory area.
The following data can be stored in this user memory area.
(a) Parameters
(b) Main programs
Sequence programs
Microcomputer programs
(c) File registers
(d) Comments
(e) Status latch
(I) Sampling trace
Allocation of user memory area sets the areas where each data should
be stored.
Parameter area
4K bytes
TIC setting value area
Main program area
2 to 16K bytes
(1 to BK steps)
Sampling trace area
Status latch
I
Data area
I
User memory area
I
area
I
File register
26 - [main program area
32K bytes
File register area
(K bytes)] K bytes
Comment area
Fig. 4.24 User Memory Area Allocation
(2) The first 20K bytes in the user memory area is write protected.
If the memory protect switch will be set ON for operation, file register
area and status latch area must not be within the write-protect area (first
20K bytes).
I
Memory
protected
j
20K bytes
12K bytes
Fig. 4.25 Memory Protect Areas
4-53

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