AH500 Programming Manual 2.1 Introduction of Devices This section gives an account of values/strings processed by the PLC. It also describes the functions of devices which include input/output/auxiliary relays, timers, counters, and data registers.
2.1.1 Devise List 2.1.1.1 AH500 Basic CPU Modules (AHCPU500/510/520/530) 2-2 Type Device name Number of devices Range Bit device Input relay X 1024 (AHCPU500) X0.0~X63.15 2048 (AHCPU510) X0.0~X127.15 4096 (AHCPU520) X0.0~X255.15 8192 (AHCPU530) X0.0~X511.15 Output relay Y 1024 (AHCPU500) Y0.0~Y63.15 2048 (AHCPU510) Y0.0~Y127.15 4096 (AHCPU520) Y0.0~Y255.15 8192 (AHCPU530) Y0.0~Y511.15 Data register D 262144 (AHCPU500) D0.0~D16383.15 524288 (AHCPU510) D0.0~D32767.15 1048576(AHCPU520/530) D0.0~D65535.15 Link register L 16384 (AHCPU500) L0.0~ L16383.15 32768 (AHCPU510) L0.0~ L32767.15 65536 (AHCPU520/530) L0.0~ L65535.15 Auxiliary relay M 8192 M0~M8191 Special auxiliary relay SM 2048 SM0~SM2047 Stepping relay S 2048 S0~S2047 Timer T 2048 T0~T2047 Counter C 2048 C0~C2047 32-bit counter HC 64 HC0~HC63 Word device Input relay X 64 (AHCPU500) X0~X63 128 (AHCPU510) X0~X127 256 (AHCPU520) X0~X255 512 (AHCPU530) X0~X511 Output relay Y 64 (AHCPU500) Y0~Y63 128 (AHCPU510) Y0~Y127 256 (AHCPU520) Y0~Y255 512 (AHCPU530) Y0~Y511 Data register D 16384 (AHCPU500) D0~D16383 32768 (AHCPU510) D0~D32767 65536 (AHCPU520/530) D0~D65535 Special data register SR 2048 SR0~SR2047 Link register L 16384 (AHCPU500) L0~L16383 32768 (AHCPU510) L0~L32767 65536 (AHCPU520/530) L0~L65535 Timer T 2048 T0~T2047 Counter C 2048 C0~C2047 32-bit counter HC 64 (128 words) HC0~HC63 Index register E 32 E0~E31 Constant* Decimal system K 16 bits:
-32768~32767 32 bits: -2147483648~2147483647 Hexadecimal system 16# 16 bits: 16#0~16#FFFF 32 bits: 16#0~16#FFFFFFFF Single-precision floating-point number F 32 bits: ±1.17549435-38~±3.40282347+38