// Commands //
public void Connect(string psOpcServerName, string psPlcAlias, int piWatchTime)
{
if (this.mConnectionState == TState.DISCONNECTED)
{
this.ChangeConnectionState(TState.CONNECTING);
this.sOPCServerName = psOpcServerName;
this.sPLCAlias = psPlcAlias;
this.iWatchTime = piWatchTime;
try
{
//Thread.Sleep(2000); // for debugging without OFS
mOPCGroup = new SAOFSGroupXClass();
mOPCGroup.Init(this.sOPCServerName, "");
this.mAddAllItems();
mOPCGroup.OnDataChange += new _ISAOPCGrpXCallback_OnDataChangeEventHandler(mOPCGroup_OnOpcDataChange);
mOPCGroup.Start(piWatchTime);
this.ChangeConnectionState(TState.CONNECTED);
}
catch (Exception ex)
{
ManageErrorConnection(ex.Message);
}
}
}
public void Disconnect()
{
if ((this.mConnectionState == TState.CONNECTED) || (this.mConnectionState == TState.CONNECTING))
{
try
{
mOPCGroup.Stop();
}
catch { }
if (mOPCGroup != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(mOPCGroup);
}
mOPCGroup = null;
this.sOPCServerName = null;
this.sPLCAlias = null;
this.ChangeConnectionState(TState.DISCONNECTED);
}
}
