Rockwell-automation Logix5000 Controllers Add-on Instructions Programm Manual do Utilizador descarregar pdf (Página 5)

Table of contents

Studio 5000 environment...........................................................................................9

Additional resources.....................................................................................................9

Understanding terminology.................................................................................... 10

Chapter 1

Introduction................................................................................................................ 13

About Add-On Instructions ................................................................................... 13

Components of an Add-On Instruction ............................................................. 14

General information.......................................................................................... 14

Parameters ............................................................................................................ 16

Local tags .............................................................................................................. 16

Data Type............................................................................................................. 17

Logic routine ....................................................................................................... 18

Optional Scan Modes routines ....................................................................... 19

Instruction signature ......................................................................................... 19

Signature history................................................................................................. 20

Change History .................................................................................................. 21

Help ....................................................................................................................... 21

Considerations for Add-On Instructions ........................................................... 22

Instruction functionality .................................................................................. 22

Encapsulation ...................................................................................................... 22

Safety Add-On Instructions ............................................................................ 23

Instruction signature ......................................................................................... 23

Safety instruction signature ............................................................................. 24

Programming languages.................................................................................... 24

Transitional instructions.................................................................................. 25

Instruction size.................................................................................................... 25

Runtime editing.................................................................................................. 26

Nesting Add-On Instructions......................................................................... 26

Routines versus Add-On Instructions .......................................................... 26

Programmatic access to data............................................................................ 28

Unavailable instructions within Add-On Instructions............................ 28

Using GSV and SSV instructions................................................................... 29

Considerations when creating parameters .......................................................... 30

Passing arguments to parameters by reference or by value ...................... 30

Selecting a data type for a parameter ............................................................. 31

Creating an alias parameter for a local tag ................................................... 31

Using a single dimension array as an InOut parameter............................ 31

Determining which parameters to make visible or required................... 32

Preface

Designing Add-On

Instructions

Rock well Automati on Publication 1756- PM010F-EN-P - Oct ober 2014 5

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