APPENDICES
APP - 36
MELSEC-
Appendix 3 Precautions when Switching from AnSCPU to AnSHCPU
Appendix 3.1 Dissimilarities between A1SHCPU and A1SCPU
The dissimilarities between the A1SHCPU and A1SCPU are as follows :
Item A1SHCPU A1SCPU
1 CPU processing speed *1 0.33
µ
s1
µ
s
2 I/O points 2048 points *2 256 points
3 File register capacity (R) Max. 8192 points (R0 to 8191) Max. 4096 points (R0 to 4095)
4 Memory capacity 64 k bytes 32 k bytes
5 Comment points Max. 3648 points Max. 1600 points *3
6 CC-Link dedicated instruction 8 None
7 Startup model A3 A1S
8 Memory write protect range First half, 32 k bytes First half, 20 k bytes
9 Microcomputer program There are some restrictions. There is no restrictions.
Conventional memory cassette
A1SMCA-2KE/8KE/8KP
× {
New-type memory cassette
A1SMCA-2KE/8KE/8KP
{{
Year, month, day, hour, minute, day of week (Automatic leap year calculation)
11 Clock precision
Precision
-3.1 to +5.3 s(TYP. +1.7 s)/d at 0 °C
-1.6 to +5.3 s(TYP. +2.4 s)/d at 25 °C
-9.6 to +3.6 s(TYP. -2.1 s)/d at 55 °C
Precision
-2.3 to +4.4 s(TYP. +1.8 s)/d at 0 °C
-1.1 to +4.4 s(TYP. +2.2 s)/d at 25 °C
-9.6 to +2.7 s(TYP. -2.4 s)/d at 55 °C
*1 : I/O processing: during refresh and LD instruction execution
*2 : Actual I/O points are the same as the AnS series, but this model has 2048 points of I/O device
for each CPU (X/Y0 to 7FF). The added I/O device can be used for MELSECNET (/B),
MELSECNET/MINI, or CC-Link.
*3 : The comment points for comments that can be stored in the CPU module is 1600 points, while up
to 3648 points of comment can be created using the GPP function.
10
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