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] ............................................................................... 2-8 2.3 Numbering and Functions of External Input/Output Contacts [X] / [Y]..................
2-10 2.4 Numbering and Functions of Auxiliary Relays [M] .............................................. 2-14 2.5 Numbering and Functions of Step Relays [S] ..................................................... 2-14 2.6 Numbering and Functions of Timers [T] ............................................................. 2-15 2.7 Numbering and Functions of Counters [C] ......................................................... 2-17 2.8 Numbering and Functions of Registers [D], [E], [F] ............................................ 2-31 2.8.1 Data register [D] ........................................................................................
2-31 2.8.2 Index Register [E], [F] ................................................................................ 2-33 2.8.3 Functions and Features of File Registers .................................................... 2-33 2.9 Pointer [N], Pointer [P], Interruption Pointer [I] .................................................. 2-34 2.10 Special Auxiliary Relays and Special Data Registers ........................................ 2-38 2.11 Functions of Special Auxiliary Relays and Special Registers ............................. 2-71 2.12 Communication Addresses of Devices in DVP Series PLC ................................
2-144 2.13 Error Codes ................................................................................................... 2-146 Chapter 3 Basic Instructions 3.1 Basic Instructions and Step Ladder Instructions ................................................ 3-1 3.2 Explanations on Basic Instructions ................................................................... 3-3 i