private int[] GetSignal(IOpcClient opc) { var rw = new int[2]; if (string.IsNullOrEmpty(groupName)) { rw[0] = opc.TryReadInt(ReadSignal); rw[1] = opc.TryReadInt(WriteSignal); } else { rw[0] = opc.TryGroupReadInt(groupName,ReadSignal); rw[1] = opc.TryGroupReadInt(groupName,WriteSignal); } return(rw); }