2. PERFORMANCE SPECIFICATIONS
2
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2
Table 2.1 SCPU Performance Specifications (Continued)
Item
A172SHCPUN
A171SHCPUN
No. of special-function registers (D)
256 points (D9000 to D9255)
No. of expansion file register block
Max. 11 blocks
(set by memory capacity)
Max. 3 blocks
(set by memory capacity)
No. of comments
Max. 4032 (64 kbytes), 1 point = 16 bytes
(Set in 64-point unit)
Number of expansion comments
(Note-2)
Max. 3968 points (63 kbytes), 1 point = 16 bytes
(Set in 64-point unit)
Self-diagnostic function
Watchdog error monitoring, memory/CPU/input/output/battery, etc. error
detection
Operation mode on error
Select stop/continue
Output mode selection when switching from STOP to
RUN
Select re-output operation status before STOP (default) or output after
operation execution.
Clock function
Year, month, day, hour, minute, day of the week (leap year automatic
distinction)
Program/parameter storage in ROM
Not possible
(Note-1) : Range of positioning dedicated devices differs depending on the OS. For details, see Chapter 3.
(Note-2) : The expansion comments are not stored in the internal memory of the CPU.
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