| 摘要 |
PURPOSE:To operate the action of a device for given time with the preceding data in case when carrier data is not judged as normal data, and to continue the action of the device, by controlling the action of said device with the presence or absence of data signal through using the control signal that includes the signal carrying data and data signal. CONSTITUTION:A signal electromagnetic wave from a transmitter 1 is received at a reception interface 10 of a receiver 2, and an operation instruction according to a transmitting signal is applied to an output interface 2 by a signal discrimination processing circuit 11, and a relay 13 is driven by the output of the interface 12. Magnet switches 17-19 for hoist, trolley and saddle of an overhead travelling crane 15 having hoist a main electric power source magnet switch 16 are driven in accordance with the transmitting signal, by the drive of the relay 13. By using the control signal that includes the signal carrying data as transmitting signal and the data signal, the circuit 11 judges the presence or absence of the data signal, and when the carrier data is not judged as normal, the operation is continued for given time with the preceding data. |
