4. AnSHCPU MODULE
4 - 21
MELSEC-A
(2)
When the A2SHCPU(S1) is used
The memory write protect range can be changed by changing the settings of
the memory write protect DIP switches. For details, see Fig. 4.16. The SW2
may be in the ON or OFF position.
Switch No.
Application
5
I/O select switch setting
ON :
Direct method
OFF :
Refresh method
Memory write protect setting (RAM and E
2
PROM)
ON :
With memory write protection *1
OFF :
Without memory write protection
Memory write protection range
4
48 to 64 k bytes
3
32 to 48 k bytes
2
16 to 32 k bytes
1
0 to 16 k bytes
*1 When installing the memory cassette, the setting becomes invalid to RAM only.
Switch No.
Application
10
I/O select switch setting
ON :
Direct method
OFF :
Refresh method
Memory write protect setting (RAM and E
2
PROM)
ON :
With memory write protection *1
OFF :
Without memory write protection
Memory write protection range
9
144 to 192 k bytes
8
112 to 144 k bytes
7
96 to 112 k bytes
6
80 to 96 k bytes
5
64 to 80 k bytes
4
48 to 64 k bytes
3
32 to 48 k bytes
2
16 to 32 k bytes
1
0 to 16 k bytes
*1 When installing the memory cassette, the setting becomes invalid to RAM only.
Fig. 4.16 Memory write protect DIP switch settings
POINT
(1)
Set the memory write protect range according to the address (step
number) of each memory area (sequence program, comment, sampling
trace, status latch, file register).
(2)
Do not use the memory write protect function when executing a sampling
trace or status latch since it will make it impossible to store the data in the
memory.
ON
OFF
1
2
3
4
5
A2SHCPU
ON
OFF
1
2
3
4
5
6
7
8
9
10
A2SHCPU-S1
Содержание A1SH
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