Mitsubishi A1SJH - Page 54

4. AnSHCPU MODULE
4 - 14
MELSEC-
A
(a) When the A1SJHCPU(S8)/A1SHCPU is used
Even if the main program is stored in an E
2
PROM/EPROM, the
capacities of the sampling trace, status latch, file register, and comment
areas cannot be increased, because the system uses the internal RAM
area (area indicated by *1 in the following figure) as in RAM operation.
ROM memory capacity
(max. 32 k bytes)
Internal RAM
memory area
(64 k bytes)
(a) In RAM operation
Not used
Parameter area
T/C set values area
Parameter area
T/C set values area
Sequence program area
(required min. 1 k step)
Sequence program area
(required min. 1 k step)
Microcomputer program area
Microcomputer program area
Extension file
register area
Extension file
register area
Sampling trace area
Status latch area
File register area
Comment area
(b) In E
2
PROM/EPROM operation
Not used
Not usedNot used
Not usable
(used by system)
*1
Sampling trace area
File register area
Comment area
3 k bytes
1 k byte
1 to 8 k steps
(2 to 16 k bytes)
Status latch area
Stored in
ROM
Usable with
SW0GHP-
ULTP-FN1.
(b) When the A2SHCPU(S1) is used
Even if the main program is stored in an E
2
PROM, the area cannot be
used for the extension file register, because the system uses the internal
RAM area (area indicated by *2 in the following figure) as in RAM
operation.
Internal RAM
memory area
A2SH: 64 k bytes
A2SH-S1: 192 k bytes
(a) In RAM operation
Not used
Parameter area
T/C set values area
Parameter area
T/C set values area
Sequence program area
(required min. 1 k step)
Sequence program area
(required min. 1 k step)
Microcomputer program area
Microcomputer program area
Extension file
register area
Extension file
register area
Sampling trace area
Status latch area
File register area
Comment area
(b) In
E
2
PROM operation
Not used
Not usedNot used
Not usable
(used by system)
*2
Sampling trace area
File register area
Comment area
3 k bytes
1 k byte
1 to 14 k steps
(2 to 28 k bytes)
Status latch area
Stored in
ROM
Usable with
SW0GHP-
ULTP-FN1.
ROM memory capacity
(max. 64 k bytes)