Omron CX-PROGRAMMER V8.1 User manual

OPERATION MANUAL

Function Blocks/

Structured Text

Cat. No. W447-E1-08

SYSMAC

CX-Programmer

Ver. 8.1

WS02-CXPC1-V8

CX-Programmer

Ver. 8.1

WS02-CXPC1-V8

Operation Manual

Function Blocks/Structured Text

Revised February 2009

Notice:

OMRON products are manufactured for use according to proper procedures by a qualified operator

and only for the purposes described in this manual.

The following conventions are used to indicate and classify precautions in this manual. Always heed

the information provided with them. Failure to heed precautions can result in injury to people or dam-

age to property.

!DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or

serious injury. Additionally, there may be severe property damage.

!WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or

serious injury. Additionally, there may be severe property damage.

!Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor or

moderate injury, or property damage.

OMRON Product References

All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to

an OMRON product, regardless of whether or not it appears in the proper name of the product.

The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means

“word” and is abbreviated “Wd” in documentation in this sense.

The abbreviation “PLC” means Programmable Controller. “PC” is used, however, in some Program-

ming Device displays to mean Programmable Controller.

Visual Aids

The following headings appear in the left column of the manual to help you locate different types of

information.

Note Indicates information of particular interest for efficient and convenient opera-

tion of the product.

1,2,3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.

OMRON, 2008

by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission o

OMRON.

No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is con-

stantly striving to improve its high-quality products, the information contained in this manual is subject to change without

notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility

for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in

this publication.

Part 1: Function Block

Part 2: Structured Text

SECTION 1 Introduction to Function Blocks

SECTION 2 Function Block Specifications

SECTION 3 Creating Function Blocks

SECTION 4 Introduction to Structured Text

SECTION 5 Structured Text (ST) Language Specifica-

tions

SECTION 6 Creating ST Programs

Appendices

TABLE OF CONTENTS

PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi

1 Intended Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

4 Application Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiii

Part 1:

Function Blocks

SECTION 1

Introduction to Function Blocks . . . . . . . . . . . . . . . . . . . . . . 3

1-1 Introducing the Function Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1-2 Function Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1-3 Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1-4 Converting Function Block Definitions to Library Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

1-5 Usage Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

1-6 Version Upgrade Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

SECTION 2

Function Block Specifications . . . . . . . . . . . . . . . . . . . . . . . . 29

2-1 Function Block Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

2-2 Data Types Supported in Function Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

2-3 Instance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

2-4 Programming Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

2-5 Function Block Applications Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

2-6 Precautions for Instructions with Operands Specifying the First or Last of Multiple Words 65

2-7 Instruction Support and Operand Restrictions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

2-8 CPU Unit Function Block Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

2-9 Number of Function Block Program Steps and Instance Execution Time . . . . . . . . . . . . . . 76

SECTION 3

Creating Function Blocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

3-1 Procedural Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

3-2 Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

TABLE OF CONTENTS

Part 2:

Structured Text (ST)

SECTION 4

Introduction to Structured Text . . . . . . . . . . . . . . . . . . . . . . 131

4-1 ST Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

4-2 CX-Programmer Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

SECTION 5

Structured Text (ST) Language Specifications . . . . . . . . . . 135

5-1 Structured Text Language Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

5-2 Data Types Used in ST Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

5-3 Inputting ST Programs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

5-4 ST Language Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

5-5 Statement Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

5-6 ST-language Program Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

5-7 Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

SECTION 6

Creating ST Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

6-1 Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Appendices

A System-defined external variables supported in function blocks . . . . . . . . . . . . . . . . . . . . . 181

B Structured Text Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

C Function Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

About this Manual:

This manual describes the CX-Programmer operations that are related to the function block functions

and Structured Text (ST) functions. The function block and structure text functionality of CX-Program-

mer Ver. 8.1 is supported by CJ2H CPU Units, by CS1-H, CJ1-H, and CJ1M CPU Units with unit ver-

sion 3.0 or later, by CP-series CPU Units, and by NSJ-series and FQM1-series Controllers.

Some function block and structure text functionality, however, is supported only by CJ2H CPU Units, by

CS1-H, CJ1-H, and CJ1M CPU Units with unit version 4.0 or later.

For details, refer to 1-6 Version Upgrade Information.

For information on functionality other than function blocks and structure text, refer to the following man-

uals.

• CX-Programmer

: CX-Programmer Operation Manual (W446) and CX-Programmer Operation Manual: SFC (W469)

• CPU Unit

: The operation manuals for the CS-series, CJ-series, CP-series, and NSJ-series Controllers

CX-Programmer Ver. 8.1 Manuals

Name Cat. No. Contents

SYSMAC WS02-CXPC1-V8

CX-Programmer Ver. 8.1 Operation Manual

Function Blocks/Structured Text

W447

(this

manual)

Explains how to use the CX-Programmer Ver. 8.1 software’s

function block and structured text functions. For explanations

of other shared CX-Programmer functions, refer to the CX-

Programmer Operation Manual (W446).

SYSMAC WS02-CXPC1-V8

CX-Programmer Operation Manual

W446 Provides information on how to use the CX-Programmer for

all functionality except for function blocks.

SYSMAC WS02-CXPC1-V8

CX-Programmer Operation Manual: SFC

W469 Explains how to use the SFC programming functions. For

explanations of other shared CX-Programmer functions, refer

to the CX-Programmer Operation Manual (W446).

CX-Net Operation Manual W362 Information on setting up networks, such as setting data links,

routing tables, and unit settings.

SYSMAC CXONE-AL@@C-V3

SYSMAC CXONE-AL@@D-V3

CX-Integrator Operation Manual

W445 Describes the operating procedures for the CX-Integrator.

This manual suits for next models

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