Rockwell-automation DeviceLogix System User Manual Manual de usuario descargar pdf (Pagina 144)

144 Publication RA-UM003B-EN-P - February 2010

Chapter 7 Create Logic in the New Ladder Editor

Working with the Tag Database

Devices have two kinds of tags:

•product scope tag

•program scope tag

If you edit Macro logic, then the product scope tag will be replaced

with the Macro scope tag.

Product scope tags are the product I/O defined in DeviceLogix. You

can assign alias names to product scope tags. In the logic

configuration, only alias tag names are used. Alias tag names are not

case-sensitive.

Use Bit type tags for input contact or output coil binding, depending

on the tag type. Use Analog input type tags only in instruction input

binding. You can use Analog type output tags in instruction output

binding, as long as the data type matches.

Use the program scope tag when you want an instruction to reference

the results of other instructions. It is a "soft" tag and is created

dynamically during the logic editing.

Product Scope Tags

I/O Data Group I/O Data Data Type Reference Rule

Hardware Input Device Input (DIP) Bit Input

Analog Input (AIP) DINT/REAL Input

Hardware Output Device Output (DOP) Bit Output/Input

Analog Output (AOP) DINT/REAL Output/Input

Soft Input Fault Bit (FB) Bit Input

Consumed Network Data (CNB) Bit/DINT/REAL Input

Status Bit (SB) Bit Input

Soft Output Produced Network Data (PND) Bit/DINT/REAL Output/Input

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Rockwell-automation DeviceLogix System User Manual Manual de usuario Pagina 144