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AH500 Programming Manual
Contents
Chapter 1 Introduction
1.1 Overview .................................................................................................. 1-2
1.1.1 Related Manuals ............................................................................... 1-2
1.1.2 Model Description .............................................................................. 1-2
1.2 Software ..................................................................................................1-10
1.2.1 Program Editor .................................................................................1-10
1.2.2 Program Organization Units and Tasks ............................................ 1-11
Chapter 2 Devices
2.1 Introduction of Devices ............................................................................. 2-2
2.1.1 Devise List ......................................................................................... 2-2
2.1.1.1 AH500 Basic CPU Modules (AHCPU500/510/520/530) ................... 2-2
2.1.1.2 AH500 Advanced CPU Modules (AHCPU501/511/521/531) ............ 2-3
2.1.2 Basic Structure of I/O Storages ......................................................... 2-4
2.1.3 Relation between the PLC Action and the Device Type .................... 2-4
2.1.4 Latched Areas in the Device Range .................................................. 2-5
2.2 Functions of Devices ................................................................................ 2-6
2.2.1 Values and Constants ........................................................................ 2-6
2.2.2 Floating-point Numbers ..................................................................... 2-7
2.2.2.1 Single-precision Floating-point Numbers ................................... 2-7
2.2.2.2 Double-precision Floating-point Numbers .................................. 2-8
2.2.2.3 Decimal Floating-point Numbers ................................................ 2-9
2.2.3 Strings ............................................................................................... 2-9
2.2.4 Input Relays .....................................................................................2-10
2.2.5 Output Relays .................................................................................. 2-11
2.2.6 Auxiliary Relays ................................................................................ 2-11
2.2.7 Special Auxiliary Relays ...................................................................2-12
2.2.8 Refresh Time of Special Auxiliary Relays .........................................2-38
2.2.9 Stepping Relays ...............................................................................2-46
2.2.10 Timers ...........................................................................................2-47
2.2.11 Counters .......................................................................................2-48
2.2.12 32-bit Counters .............................................................................2-50
2.2.13 Data Registers ..............................................................................2-51
2.2.14 Special Data Registers .................................................................2-52
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