Rockwell-automation Logix5000 Controllers I/O and Tag Data Programming Manual do Utilizador descarregar pdf (Página 65)

Data access control Chapter 4

Important:

For alias type tags, the External Access list is unavailable. You are not allowed to change the external

access of an alias tag. However, the External Access list updates its value to be the same as the external

access of the base target.

See Find a base tag with Go To on page 69

for procedures to locate the base tag for an alias.

See External access availability on page 70 for additional tag considerations.

Configure external access in the New Tag dialog box

You can create the following types of tags in the New Tag dialog box.

• Base

• Alias

• Produced

• Consumed

The parameters on the dialog box depend on the type of tag you are creating. For

tag descriptions, see Tag type on page 22.

You choose the external access attribute for a new tag in the External Access list

on the New Tag dialog box. Follow these steps.

1. In the Controller Organizer, right-click Controller Tags and then click

New Tag.

2. In the New Tag dialog box, in the Type list, choose a tag type.

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Rockwell-automation Logix5000 Controllers I/O and Tag Data Programming Manual do Utilizador Página 65