internal protected override bool Connect(string OPCServerIP)
{
bool success = true;
success &= PLC.Connect("OPC.SimaticNET", OPCServerIP);
success &= PLC.AddGroup(GROUP_NAME_CTRL, 1, 0);
success &= PLC.AddItems(GROUP_NAME_CTRL, ItemCtrl);
success &= PLC.AddGroup(GROUP_NAME_STATE, 1, 0);
success &= PLC.AddItems(GROUP_NAME_STATE, ItemStatus);
PLC.SetState(GROUP_NAME_CTRL, true);
PLC.SetState(GROUP_NAME_STATE, true);
ConnectionState = (success) ? (ConnectionState.Open) : (ConnectionState.Closed);
return(success);
}