AH500 Hardware and Operation Manual 
2-4 
2.2  Specifications for CPU Modules 
2.2.1  12BAH500 Series Basic CPU Modules  
Item 
AHCPU500/510/520/530
AHCPU500/510/520/530 
Remark 
The program is executed cyclically. 
Input/Output control 
Regenerated inputs/outputs   
Direct inputs/outputs 
The inputs and 
outputs can be 
controlled through the 
direct inputs and 
Programming language 
Ladder diagrams, function block diagrams, 
instruction lists, structured texts, and sequential 
Instruction execution speed 
Approximately 666 instructions 
Constant scan cycle (ms) 
(The scan cycle can be increased by one 
By setting the 
parameter 
Program capacity (step) 
32K steps (AHCPU500) 
64K steps (AHCPU510) 
128K steps (AHCPU520) 
A module is installed directly on a backplane. 
Connection between two 
backplanes 
An extension cable connects two backplanes. 
Maximum number of 
modules which can be 
installed 
AHCPU510: 20 modules 
AHCPU520: 36 modules 
Maximum number of 
backplanes which can be 
connected 
AHCPU500: 1 backplane (1 main backplane) 
AHCPU510: 2 backplanes (1 main backplane+1 
extension backplane) 
AHCPU520: 4 backplanes (1 main backplane+3 
extension backplanes) 
AHCPU530: 8 backplanes (1 main backplane+7 
Number of tasks 
283 tasks (32 cyclic tasks; 32 I/O interrupts; 4 
timed interrupts; 2 communication interrupts; 1 
external 24 V low-voltage interrupt; 212 external 
Number of inputs/outputs 
AHCPU500: 768   
AHCPU510: 1280   
AHCPU520: 2304   
AHCPU530: 4352   
inputs/outputs 
accessible to an 
actual input/output 
Input relays [X] 
AHCPU500: 1024 (X0.0~X63.15) 
AHCPU510: 2048 (X0.0~X127.15) 
AHCPU520: 4096 (X0.0~X255.15) 
AHCPU530: 8192 (X0.0~X511.15) 
Output relays [Y] 
AHCPU500: 1024 (Y0.0~Y63.15) 
AHCPU510: 2048 (Y0.0~Y127.15) 
AHCPU520: 4096 (Y0.0~Y255.15) 
AHCPU530: 8192 (Y0.0~Y511.15)