Specifications

5
■ Specifications of AnU, AnA and AnN CPUs
A3NMCA-0 to 56
A3AMCA-96
A4UMCA-8E, 32E
A4UMCA-8E, 32E
A3NMCA-0 to 56
Item A4UCPU A3UCPU A2UCPU-S1 A2UCPU
Control system Repeated operation using stored program
I/O control method
Refresh mode (direct mode can be used partially in accordance
with the instruction)
Programming language
Language dedicated to sequence control.
Combined use of relay symbol type and logic symbol type.
Sequence instructions 25
Number of instructions Basic instructions 235 233
Application instructions 204
Processing speed (sequence instruction) 0.15 µsec/step 0.2µsec/step
I/O points
Total incl. remote 8192
Local 4096 2048 1024 512
Watchdog timer (WDT) 200 msec
Memory capacity 1024k byte 448k byte
A3NMCA-0 to 56
A3AMCA-96
Compatible memory cassette
A4UMCA-128
A4UMCA-8E
A4UMCA-32E
A4UMCA-128E
Program capacity
Main 30k step 30k step 14k step
Sub 30k step×3 30k step N/A
Internal relay (M) 7144 points (M0 to 999, M2048 to 8191) (default value)
Latch relay (L) 1048 points (L1000 to 2047) (default value)
Link relay (B) 8192 points (B0 to 1FFF)
Number of points 2048 points (default 256)
100 ms T0 to T199 (0.1 to 3276.7 sec)
Time (T) 10 ms T200 to T255 (0.01 to 327.67 sec)
100 ms retentive timer None (default value) (0.1 to 3276.7 sec)
Extension timer T256 to T2047
Number of points 1024 points (default 256)
Counter (C)
Normal counter C0 to C255 (range: 0 to 32767)
Interrupt counter None (default value)
Extension counter C256 to C1023
Data register (D) 8192 points (D0 to D8191)
Link register (W) 8192 points (W0 to W1FFF)
Annunciator (F) 2048 points (F0 to F2047)
File register (R) Max. 8192 points (R0 to R8191)
Accumulator (A) 2 points (A0, A1)
Index register (V, Z) 14 points (V, V0 to V6, Z, Z1 to Z6)
Pointer (P) 256 points (P0 to P255)
Interrupt pointer (I) 32 points (I0 to I31)
Special relay (M) 256 points (M9000 to M9255)
Special register (D) 256 points (D9000 to D9255)
Self diagnostic functions
Watchdog timer, memory error detection, CPU error detection, I/O error
detection, battery error detection, etc.
Operation mode at time of error STOP / CONTINUE
STOP to RUN mode Output data at time of STOP restored/data output after operation execution
Allowable momentary power failure 20 ms
Current consumption (DC 5V) 0.5A 0.5A 0.4A 0.4A
Weight 0.6 kg / 1.3 lb 0.6 kg / 1.3 lb 0.5 kg / 1.1 lb 0.5 kg / 1.1 lb
A Series CPUs
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