Mitsubishi QD51-R24 Programming Manual

A - 3 A - 3
INTRODUCTION
Thank you for purchasing the MELSEC-Q, A series PLC.
Please read this manual carefully so that equipment is used to its optimum.
CONTENTS
SAFETY PRECAUTIONS..............................................................................................................................A- 1
REVISIONS....................................................................................................................................................A- 2
CONTENTS....................................................................................................................................................A- 3
How to use this manual..................................................................................................................................A-13
Regarding Compiler BASIC...........................................................................................................................A-13
About Module Names ....................................................................................................................................A-13
1 OVERVIEW 1- 1 to 1- 3
1.1 Features ..................................................................................................................................................1- 2
1.2 Symbols Used in This Manual................................................................................................................1- 3
2 THE BASICS OF AD51H-BASIC 2- 1 to 2- 24
2.1 Preparation to Use AD51H-BASIC.........................................................................................................2- 1
2.2 Direct Mode and Program Mode ............................................................................................................2- 4
2.3 Line Format .............................................................................................................................................2- 4
2.4 Spaces and Keywords............................................................................................................................2- 5
2.5 Characters Used in BASIC.....................................................................................................................2- 6
2.6 What are Instructions and Functions?....................................................................................................2- 9
2.7 Constants ................................................................................................................................................2-10
2.7.1 Character string constants...............................................................................................................2-10
2.7.2 Numeric constants............................................................................................................................2-10
2.7.3 Single-precision and double-precision numeric constants .............................................................2-10
2.8 Variables..................................................................................................................................................2-12
2.8.1 Variable names and type declaration characters............................................................................2-12
2.8.2 Array variables..................................................................................................................................2-13
2.8.3 Special variables (How to use B@ and W@) .................................................................................2-14
2.9 Type Conversion.....................................................................................................................................2-17
2.10 Expressions and Operators.................................................................................................................. 2-18
2.10.1 Arithmetic operators.......................................................................................................................2-18
2.10.2 Relational operators.......................................................................................................................2-20
2.10.3 Logical operators............................................................................................................................2-21
2.11 Character String Operations.................................................................................................................2-23
2.12 Priority Order of Operations..................................................................................................................2-24

Mitsubishi QD51-R24 Specifications

General

Brand	Mitsubishi
Model	QD51-R24
Category	Controller
Language	English