"DB1".物理范围转换为 := NORM_X(MIN := "DB1".电流下限值, VALUE := "DB1".plc接收到的电流, MAX := "DB1".电流上限值);"DB1".温度 := SCALE_X(MIN := "DB1".温度下限值_1, VALUE := "DB1".物理范围转换为, MAX := "DB1".温度上限值_1);IF "DB1".plc接收到的电流 < 4 THEN "DB1".plc接收到的电流 := 4 // Statement section IF ;END_IF;