Abstract: A RIO device mounted to a train includes an output unit that outputs a signal to a relay mounted to the train, and a controller that controls whether or not to cause the output unit to output the signal. The output unit includes a readback circuit that detects whether or not the signal is outputted from the output unit. The controller makes a signal stop request and a signal output request to the output unit before operation of the train starts, acquires a detection result of the readback circuit while each of the signal stop request and the signal output request is performed, and detects abnormality of the output unit using the detection result.

Abstract: A RIO device mounted to a train includes an output unit that outputs a signal to a relay mounted to the train, and a controller that controls whether or not to cause the output unit to output the signal. The output unit includes a readback circuit that detects whether or not the signal is outputted from the output unit. The controller makes a signal stop request and a signal output request to the output unit before operation of the train starts, acquires a detection result of the readback circuit while each of the signal stop request and the signal output request is performed, and detects abnormality of the output unit using the detection result.

Abstract: A ground device includes a control unit, a storage unit, and a ground transmitting and receiving unit. A ground antenna is connected to the ground transmitting and receiving unit. Train information from an on-board device is received by the ground transmitting and receiving unit via the ground antenna, and is then transmitted to the control unit. Meanwhile, information from the control unit is transmitted to the on-board device via the ground transmitting and receiving unit and the on-board antenna. The control unit accumulates the train information on a train in the storage unit, and also transmits, to the on-board device, command information for a device installed in the train.

Abstract: A ground device includes a control unit, a storage unit, and a ground transmitting and receiving unit. A ground antenna is connected to the ground transmitting and receiving unit. Train information from an on-board device is received by the ground transmitting and receiving unit via the ground antenna, and is then transmitted to the control unit. Meanwhile, information from the control unit is transmitted to the on-board device via the ground transmitting and receiving unit and the on-board antenna. The control unit accumulates the train information on a train in the storage unit, and also transmits, to the on-board device, command information for a device installed in the train.