DVP-PLC Application Manual
【Programming】
Table of Contents
Chapter 1 Basic Principles of PLC Ladder Diagram
Foreword: Background and Functions of PLC.......................................................... 1-1
1.1 The Working Principles of Ladder Diagram........................................................ 1-1
1.2 Differences Between Traditional Ladder Diagram and PLC Ladder Diagram........ 1-2
1.3 Edition Explanation of Ladder Diagram ............................................................. 1-3
1.4 How to Edit Ladder Diagram............................................................................. 1-8
1.5 The Conversion of PLC Command and Each Diagram Structure ......................... 1-12
1.6 Simplified Ladder Diagram ............................................................................... 1-15
1.7 Basic Program Designing Examples.................................................................. 1-17
Chapter 2 Functions of Devices in DVP-PLC
2.1 All Devices in DVP-PLC.................................................................................... 2-1
2.2 Values, Constants [K] / [H] ............................................................................... 2-6
2.3 Numbering and Functions of External Input/Output Contacts [X] / [Y].................. 2-8
2.4 Numbering and Functions of Auxiliary Relays [M] .............................................. 2-11
2.5 Numbering and Functions of Step Relays [S]..................................................... 2-11
2.6 Numbering and Functions of Timers [T]............................................................. 2-12
2.7 Numbering and Functions of Counters [C]......................................................... 2-14
2.8 Numbering and Functions of Registers [D], [E], [F] ............................................ 2-28
2.8.1 Data register [D] ........................................................................................ 2-28
2.8.2 Index Register [E], [F]................................................................................ 2-29
2.8.3 Functions and Features of File Registers .................................................... 2-30
2.9 Pointer [N], Pointer [P], Interruption Pointer [I] .................................................. 2-30
2.10 Special Auxiliary Relays and Special Data Registers........................................ 2-33
2.11 Functions of Special Auxiliary Relays and Special Registers............................. 2-69
2.12 Error Codes................................................................................................... 2-125
Chapter 3 Basic Instructions
3.1 Basic Instructions and Step Ladder Instructions ................................................ 3-1
3.2 Explanations on Basic Instructions ................................................................... 3-3
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