Opc data Access Automation Specification

4.4.4.5

 

IsSubscribed  

Description 

(Read/Write) This property controls asynchronous notifications to the group. A group that is 

subscribed receives data changes from the server. 

Syntax 

IsSubscribed As Boolean 

Remarks 

Default value for this property is the value from the OPCGroups corresponding default value at 

time of the Add(); 

Example 

VB Syntax Example (getting the property): 

Dim CurrentValue As Boolean 

Set MyGroups = AnOPCServer.OPCGroups 

Set OneGroup = MyGroups.ConnectPublicGroup ( “AnOPCGroupName” ) 

‘   some more code here 

Set CurrentValue = OneGroup.IsSubscribed ‘ to get the value 

VB Syntax Example (setting the property): 

Set MyGroups = AnOPCServer.OPCGroups 

Set OneGroup = MyGroups.ConnectPublicGroup ( “AnOPCGroupName” ) 

‘   some more code here 

OneGroup.IsSubscribed = True ‘ to set the value