A-3
INTRODUCTION
Thank you for purchasing the Mitsubishi MELSEC-Q series programmable controller.
Before using the product, thoroughly read this manual to develop full familiarity with the programming
specifications to ensure correct use.
Please forward this manual to the end user.
CONTENTS
SAFETY PRECAUTIONS .................................................................................................................................A - 1
REVISIONS.......................................................................................................................................................A - 2
INTRODUCTION...............................................................................................................................................A - 3
CONTENTS ......................................................................................................................................................A - 3
MANUALS.........................................................................................................................................................A - 5
PURPOSE OF THIS MANUAL .........................................................................................................................A - 6
GENERIC TERMS AND ABBREVIATIONS IN THIS MANUAL........................................................................A - 8
1. OVERVIEW 1 - 1 to 1 - 4
1.1 Overview 1 - 2
1.2 Features of Structured Programs 1 - 2
1.3 Applicable CPU Modules 1 - 3
1.4 Compatible Software Package 1 - 3
2. STRUCTURED DESIGN OF SEQUENCE PROGRAMS 2 - 1 to 2 - 4
2.1 What is a Hierarchical Sequence Program? 2 - 2
2.2 What is a Structured Sequence Program? 2 - 3
3. PROCEDURE FOR CREATING PROGRAMS 3 - 1 to 3 - 2
3.1 Procedure for Creating Sequence Programs in Structured Project 3 - 2
4. PROGRAM CONFIGURATION 4 - 1 to 4 - 28
4.1 Overview of Program Configuration 4 - 2
4.1.1 Project ........................................................................................................................................... 4 - 3
4.1.2 Program files.................................................................................................................................. 4 - 3
4.1.3 Tasks ........................................................................................................................................... 4 - 4
4.2 POUs 4 - 5
4.2.1 Types of POU ................................................................................................................................ 4 - 5
4.2.2 Program blocks.............................................................................................................................. 4 - 6
4.2.3 Functions ....................................................................................................................................... 4 - 6
4.2.4 Function blocks.............................................................................................................................. 4 - 7
4.2.5 Networks........................................................................................................................................ 4 - 8
4.2.6 Programming languages for POUs ............................................................................................... 4 - 9
4.2.7 Functions and function blocks ..................................................................................................... 4 - 10
4.2.8 EN and ENO ................................................................................................................................ 4 - 13
4.3 Labels 4 - 14
4.3.1 Global labels ................................................................................................................................ 4 - 14
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