INGEAR.NET.ABLink

 

GroupUpdate Delegate

Indicates when a GroupRead or GroupWrite completes

[Visual Basic]
Public Delegate Sub GroupUpdate( _
   ByVal sender As Object, _
   ByVal e As TagGroupEventArgs _
)
[C#]
public delegate void GroupUpdate(
   object sender,
   TagGroupEventArgs e
);

Parameters

sender
Instance of TagGroup that invoked the event.
e
Arguments associated with the event

Example

VB
Try
  ' ****************************
  ' * initialize controller, group and tags
  Dim MyPLC As New ABLink.Controller("192.168.1.32")
  Dim WithEvents MyGroup As New ABLink.TagGroup
  Dim Tag1 As New ABLink.Tag("N7:0")
  Dim Tag2 As New GELink.Tag("F8:0")
  ' *****************************
  ' * add the event handler
   AddHandler MyGroup.Update,  AddressOf MyGroup_Update
  ' *****************************
  ' * add tags to group
  MyGroup.AddTag(Tag1)
  MyGroup.AddTag(Tag2)
  ' *****************************
  ' * Read the Group
  MyPLC.GroupRead(MyGroup)
Catch ex As System.Exception
  Console.WriteLine(ex.Message)
End Try
' **************************  
' * Event Handler
' **************************
Private Sub MyGroup_Update(ByVal sender As Object, ByVal e As ABLink.TagGroupEventArgs) Handles MyGroup.Update)
  Try
    ' * what caused event
     Console.WriteLine(e.EventName)
  
     ' * process list of tags
     For Each (ABLink.Tag theTag in e.TagList)
       Console.WriteLine(theTag.Value.ToString())
     Next  
  Catch ex As System.Exception
    Console.WriteLine(ex.Message)
  End Try    
End Sub


C#
try
{
  ///////////////////////////////////////
  // initialize controller, group and tags
  ABLink.Controller MyPLC = new ABLink.Controller("192.168.1.45")
  ABLink.TagGroup MyGroup = new ABLink.TagGroup();
  ABLink.Tag Tag1 = new ABLink.Tag("N7:0");
  ABLink.Tag Tag2 = new ABLink.Tag("F8:0");
  // add the event handler
  MyGroup.GroupUpdate += new MyTag.GroupUpdateEventHandler(MyGroup_Update);
  // read the tag
  MyPLC.ReadTag(myTag);
}
catch(System.Exception ex)
{
  Console.WriteLine(ex.Message);
}
/////////////////////////////  
// event handler
void MyGroup_Update(sender As Object, e As ABLink.DataChangeEventArgs) Handles Tag1.Changed)
{
try
{
  if( e.QualityCode == ResultCode.QUAL_GOOD)
    Console.WriteLine(e.Value.ToString());
}

Requirements

Namespace: ABLink

Assembly: INGEAR.NET.ABLink (in INGEAR.NET.ABLink.dll)

See Also

ABLink Namespace