7
2.1.3 AnUCPU Module Performance Specifications
This section explains the performance specifications and devices of the AnUCPU.
Table 2.3 Performance Specifications
Performance
Item
A2UCPU A2UCPU-S1 A3UCPU A4UCPU
Remarks
Control system
Stored program, repeated operation
I/O control method
Refresh method
Instructions to
enable partial
direct I/O are
available.
Language dedicated to sequence control
Programming language Combined use of relay symbol type, logic symbolic
language and MELSAP-II (SFC)
Processing speed
(Sequence
instruction)
(
µ
sec/step)
0.2 0.15
Sequence
instruction
25
Basic,
application
instruction
233 235
Inst-ru
ction
(types)
Dedicated
instruction
204
Constant scan
(program start at
specified intervals)
Can be set between 10 msec and 190 msec in 10 msec
increments
Set in special
register D9020.
Memory capacity
Capacity of installed
memory cassette
(Max. 448 kbytes)
Capacity of installed
memory cassette
(Max. 1024 kbytes)
Main
sequence
program
Max. 14k steps
Max. 30k steps
Program
capacity
Sub-seque
nce
program
Absent
Max. 30k
steps
Max. 30k
steps
×
3
Set in
parameters.
I/O device points
8192 points (X/Y0 to 1FFF)
The number of
points usable in
the program
I/O points
512 points
(X/Y0 to
1FF)
1024 points
(X/Y0 to
3FF)
2048 points
(X/Y0 to
7FF)
4096 points
(X/Y0 to
FFF)
The number of
points which can
be used for
accessibility to
actual I/O
modules
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