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 ................................................................................................... 1-9 1.2.1 Program Editor ..................................................................................
1-9 1.2.2 Program Organization Units and Tasks ............................................1-10 Chapter 2 Devices 2.1 Introduction of Devices ............................................................................. 2-2 2.1.1 Devise List ......................................................................................... 2-2 2.1.2 Basic Structure of I/O Storages ......................................................... 2-3 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 ...................................................................
2-11 2.2.8 Refresh Time of Special Auxiliary Relays .........................................2-42 2.2.9 Stepping Relays ...............................................................................2-50 2.2.10 Timers ..............................................................................................2-51 2.2.11 Counters ...........................................................................................2-53 2.2.12 32-bit Counters .................................................................................2-54 2.2.13 Data Registers .................................................................................2-55 2.2.14 Special Data Registers .....................................................................2-56 2.2.15 Refresh Time of Special Data Registers ...........................................2-82 2.2.16 Additional Remarks on Special Auxiliary Relays and Special Data i