Rockwell-automation FactoryTalk Historian SE ProcessBook 3.2 User Guid Uživatelský manuál stáhnout pdf (Strana 321)

9 ● Visual Basic for Applications in FactoryTalk Historian ProcessBook

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303

 Update a FactoryTalk Historian ProcessBook display by typing new

tag names into a spreadsheet.

Although Automation scripts are not required to use a dialect of Visual

Basic, at the present time, that is the most common approach.

Automation Vocabulary

Understanding OLE automation requires some technical vocabulary.

Terms used in the FactoryTalk Historian ProcessBook VBA Language

Reference Guide are defined below.

Automation

Accessing an object in an application and changing it or

using it without using the user interface.

ActiveX Automation Server

The application that provides data. FactoryTalk Historian

ProcessBook is an OLE Automation Server. It provides

access to its internal objects from other applications.

ActiveX Automation Container

The application that initiates changes through scripts.

FactoryTalk Historian ProcessBook is an Automation

container, as are Microsoft Excel, Microsoft Access, and a

few other commercial products.

Object

A specific item that may be manipulated by a script. For

example, a ProcessBook, a display, or a symbol may be

the object of a VB or VBA script.

Property

An attribute of an object. An object with read-write

properties can have variable information assigned to it by

the script. A read-only property cannot be changed.

Method

An action that can be performed on an object and may or

may not return a value. Sometimes called a function.

Event

A procedure that executes whenever a particular action

occurs, such as a mouse click.

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Rockwell-automation FactoryTalk Historian SE ProcessBook 3.2 User Guid Uživatelský manuál Strana 321