Mitsubishi MELSEC-A series Programming Manual

8. MICROCOMPUTER MODE
8 − 15
MELSEC-A
Device
CPU
Type
Address
File register
(R)
block No. 0
File register head address *1
= 20000H + (memory cassette RAM capacity) - (comment capacity)
- (file register capacity)
Memory cassette RAM capacity
A3(N)MCA-0=16K bytes
A3(N)MCA-2=16K bytes
A3(N)MCA-4=32K bytes
A3(N)MCA-8=64K bytes
A3MCA-12=96K bytes
A3NMCA-16=96K bytes (actual capacity: 128K bytes)
A3MCA-18=144K bytes
A3MCA-24=144K bytes (actual capacity: 192K bytes)
A3NMCA-40=144K bytes (actual capacity: 320K bytes)
A3NMCA-56=144K bytes (actual capacity: 448K bytes)
Value for calculation
Comment capacity: (Number of comments) x 16 bytes + 1K bytes
File register capacity: (Number of file registers) x 2 bytes
* Use 1024 bytes in place of 1K bytes in calculation mentioned above.
Extension
register (R)
block NO.
1 to 9
A2
A2-S1
A3
A2N
A2N-S1
A3N
A3H
A3M
A3V
A2C
A52G
A0J2H
A73
A3N board
File register head address by each block No. *1
= 20000
H + (memory cassette RAM capacity) – (comment capacity)
– (file register capacity) – (status latch capacity) – (sampling trace capacity)
- 4000
H × n
Comment capacity: (Number of comments) × 16 bytes + 1k bytes
File register capacity: (Number of file registers) × 2 bytes
Status latch capacity: Number of set bytes
Sampling trace capacity: When setting is provited 8k bytes
n: Block No.
*1: In the case of an AnS, AnSH, and A1FX, replace this value with the internal memory capacity to
calculate the file register head address.

Mitsubishi MELSEC-A series Specifications

General

Brand	Mitsubishi
Model	MELSEC-A series
Category	Controller
Language	English