Memory Capacity Settings (Main Programs, File Registers, Comments, Etc.) - Mitsubishi A1SJH User Manual

4. AnSHCPU MODULE
4.1.7

Memory capacity settings (main programs, file registers, comments, etc.)

Item
Parameter,
T/C set values
Main
Sequence
program
program
Microcomputer
program
Sampling trace
Data memory
Status
latch
File registers
File registers
Comments
The A1SHCPU, A2SHCPU(S1) provides 64 k (192 k) bytes of user memory area
(RAM).
Data for parameters, T/C set values, main programs, sampling trace, status latch,
file registers, and comments can be stored in the user memory area.
(1) Calculating memory capacity
The user memory can be divided into several memory blocks in accordance
with the parameter settings.
Table 4.5 Parameter settings and memory capacity
Setting module

(Main sequence program capacity) ×
1 k steps
2 k bytes
(Main micro computer program
2 k bytes
capacity) ×1 k byte
Not available/
available
Not available/
available
Not available/
(File registers' memory capacity) 1 k
available
byte
(File registers' number of points)
1 k points
× 2 k bytes
Number of comments
64 points
(2) Storage priority in user memory
The data set in the parameters is stored in the following sequence.
Memory capacity
4 k bytes (fixed)
0/8 k bytes
0/8 k bytes
+ 1 k byte
64
4 - 13
MELSEC-A
Storage
Remark
onto ROM
Occupies 4 k bytes for
Possible parameters and T/C set
values
The memory capacity for
the file register status latch
is determined by the
number of file register
points set using
Impossible
parameters.
1 k byte is occupied by the
system when setting
comment capacity.