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Omron CX-PROGRAMMER V8.1 User Manual

Omron CX-PROGRAMMER V8.1
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135
SECTION 5
Structured Text (ST) Language Specifications
This section provides specifications for reference when using structured text programming, as well as programming
examples and restrictions.
5-1 Structured Text Language Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
5-1-1 Overview of the Structured Text Language . . . . . . . . . . . . . . . . . . . 136
5-2 Data Types Used in ST Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
5-2-1 Basic Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
5-2-2 Derivative Data Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
5-3 Inputting ST Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
5-3-1 Syntax Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
5-3-2 CX-Programmer's ST Input Screen Display. . . . . . . . . . . . . . . . . . . 140
5-4 ST Language Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
5-4-1 Statements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
5-4-2 Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
5-4-3 Inputting Constants. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
5-4-4 Operators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
5-4-5 Standard Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
5-4-6 OMRON Expansion Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
5-5 Statement Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
5-5-1 Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
5-5-2 Control Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
5-6 ST-language Program Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
5-6-1 Using an ST Program in a Function Block . . . . . . . . . . . . . . . . . . . . 166
5-7 Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
5-7-1 Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
5-7-2 Commonly Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

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Omron CX-PROGRAMMER V8.1 Specifications

General IconGeneral
BrandOmron
ModelCX-PROGRAMMER V8.1
CategorySoftware
LanguageEnglish

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