Connect Method

Connects two object's properties together including connecting to an external data source. Once the connection is successfully made, changes in the source's data are automatically transferred to the connected property. Use Connect to make animation connections to data source tags. Connect supports expressions as the definition of a source.

Syntax

object.Connect bstrPropertyName, bstrSource, iStatus, [fTolerance], [iFlags], [fDeadband], [fUpdateRate]

Properties

The Connect method syntax has the following parts:

Part

Description

object

An object expression that evaluates to an object in the Applies To list.

bstrPropertyName

String. The name of the object's property to animate.

bstrSource

String. The data source reference definition.

iStatus

Long. Returns the error value.
Return values are:
0 – OK
1 – Syntax error
2 – Data Undefined
3 – Data type mismatch

fTolerance

Variant. (Optional) Used to evaluate the definition of equal in an expression.

Iflags

Variant. (Optional) Reserved.

fdeadband

Variant. (Optional) Used to determine how much the source needs to change before the exception is transferred to the connected property.

fUpdateRate

Variant. (Optional) The requested maximum update rate for this connection in seconds. This property is used as a hint to the data system for a poll rate to the OPC server.

 

Example

Applies To