Car monitoring system

1. A car monitoring system comprising:

a sub-system configured to execute a predetermined function by controlling at least one instrument mounted on a railcar; and

a monitoring device configured to monitor an operating state of the sub-system, wherein:

the sub-system includes

a sub-system controller configured to create status data formatted to include a plurality of regions including an event region containing pieces of event information based on a signal output from the instrument and periodically transmit the status data to the monitoring device, the pieces of event information informing the monitoring device of a change in state of the instruments; and

a first memory configured to store a first event parameter file which defines a data structure of the event region of the status data, and

when the first event parameter file is changed, and the sub-system controller creates the status data, the sub-system controller reconstructs the data structure of the event region based on the changed first event parameter file and resets the pieces of event information in accordance with the reconstructed data structure.

2. The car monitoring system according to claim 1 , wherein:

the monitoring device includes

a second memory configured to store the status data received from the sub-system controller and a second event parameter file defining the data structure of the event region contained in the status data and

a monitoring device controller configured to monitor the operating state of the sub-system based on the status data; and

when the second event parameter file is changed, and the monitoring device controller monitors the operating state of the sub-system, the monitoring device controller reconstructs the data structure of the event region based on the changed second event parameter file and interprets the pieces of event information in accordance with the reconstructed data structure.

3. The car monitoring system according to claim 2 , wherein:

the status data further contains pieces of signal information that is information of a signal indicating an operating state of the instrument controlled by the sub-system;

in the sub-system, the first memory further stores a first signal parameter file defining a data structure of a signal region of the status data, the signal region being a region in which the pieces of signal information are stored;

the first signal parameter file contains information specifying storage positions of the pieces of signal information in the signal region; and

when the first signal parameter file is changed, and the sub-system controller creates the status data, the sub-system controller specifies the positions of the pieces of signal information based on the information specifying the storage positions of the pieces of signal information contained in the changed first signal parameter file, reconstructs the data structure of the signal region, and resets the pieces of signal information in accordance with the reconstructed data structure.

4. The car monitoring system according to claim 2 , wherein:

the status data further contains pieces of signal information that is information of a signal indicating an operating state of the instrument controlled by the sub-system;

in the monitoring device, the second memory further stores a second signal parameter file defining a data structure of a signal region of the status data, the signal region being a region in which the pieces of signal information are stored;

the second signal parameter file contains information specifying storage positions of the pieces of signal information in the signal region; and

when the second signal parameter file is changed, and the monitoring device controller monitors the operating state of the sub-system, the monitoring device controller specifies the positions of the pieces of signal information based on the information specifying the storage positions of the pieces of signal information contained in the changed second signal parameter file, reconstructs the data structure of the signal region, and interprets the pieces of signal information in accordance with the reconstructed data structure.

5. The car monitoring system according to claim 4 , wherein:

the second signal parameter file contains a conversion coefficient by which each of the pieces of signal information is converted into a value used in the monitoring device; and

the monitoring device controller interprets the pieces of signal information contained in the signal region by utilizing the conversion coefficient contained in the second signal parameter file.

6. The car monitoring system according to claim 2 , wherein:

each of the pieces of event information corresponds to one-bit data in the event region;

the pieces of event information are arranged in order from a first bit position in the event region; and

the monitoring device controller specifies positions of the pieces of event information based on the changed second event parameter file and reconstructs the data structure of the event region.

7. The car monitoring system according to claim 6 , wherein:

the status data further contains pieces of signal information that is information of a signal indicating an operating state of the instrument controlled by the sub-system;

in the sub-system, the first memory further stores a first signal parameter file defining a data structure of a signal region of the status data, the signal region being a region in which the pieces of signal information are stored;

the first signal parameter file contains information specifying storage positions of the pieces of signal information in the signal region; and

when the first signal parameter file is changed, and the sub-system controller creates the status data, the sub-system controller specifies the positions of the pieces of signal information based on the information specifying the storage positions of the pieces of signal information contained in the changed first signal parameter file, reconstructs the data structure of the signal region, and resets the pieces of signal information in accordance with the reconstructed data structure.

8. The car monitoring system according to claim 6 , wherein:

the status data further contains pieces of signal information that is information of a signal indicating an operating state of the instrument controlled by the sub-system;

in the monitoring device, the second memory further stores a second signal parameter file defining a data structure of a signal region of the status data, the signal region being a region in which the pieces of signal information are stored;

the second signal parameter file contains information specifying storage positions of the pieces of signal information in the signal region; and

when the second signal parameter file is changed, and the monitoring device controller monitors the operating state of the sub-system, the monitoring device controller specifies the positions of the pieces of signal information based on the information specifying the storage positions of the pieces of signal information contained in the changed second signal parameter file, reconstructs the data structure of the signal region, and interprets the pieces of signal information in accordance with the reconstructed data structure.

9. The car monitoring system according to claim 8 , wherein:

the second signal parameter file contains a conversion coefficient by which each of the pieces of signal information is converted into a value used in the monitoring device; and

the monitoring device controller interprets the pieces of signal information contained in the signal region by utilizing the conversion coefficient contained in the second signal parameter file.

10. The car monitoring system according to claim 1 , wherein:

each of the pieces of event information corresponds to one-bit data in the event region;

the pieces of event information are arranged in order from a first bit position in the event region; and

the sub-system controller specifies positions of the pieces of event information based on the changed first event parameter file and reconstructs the data structure of the event region.

11. The car monitoring system according to claim 10 , wherein:

the status data further contains pieces of signal information that is information of a signal indicating an operating state of the instrument controlled by the sub-system;

in the sub-system, the first memory further stores a first signal parameter file defining a data structure of a signal region of the status data, the signal region being a region in which the pieces of signal information are stored;

the first signal parameter file contains information specifying storage positions of the pieces of signal information in the signal region; and

when the first signal parameter file is changed, and the sub-system controller creates the status data, the sub-system controller specifies the positions of the pieces of signal information based on the information specifying the storage positions of the pieces of signal information contained in the changed first signal parameter file, reconstructs the data structure of the signal region, and resets the pieces of signal information in accordance with the reconstructed data structure.

12. The car monitoring system according to claim 1 , wherein:

the status data further contains pieces of signal information that is information of a signal indicating an operating state of the instrument controlled by the sub-system;

in the sub-system, the first memory further stores a first signal parameter file defining a data structure of a signal region of the status data, the signal region being a region in which the pieces of signal information are stored;

the first signal parameter file contains information specifying storage positions of the pieces of signal information in the signal region; and

when the first signal parameter file is changed, and the sub-system controller creates the status data, the sub-system controller specifies the positions of the pieces of signal information based on the information specifying the storage positions of the pieces of signal information contained in the changed first signal parameter file, reconstructs the data structure of the signal region, and resets the pieces of signal information in accordance with the reconstructed data structure.

13. A car monitoring system comprising:

a sub-system configured to execute a predetermined function by controlling at least one instrument mounted on a railcar; and

a monitoring device configured to monitor an operating state of the sub-system, wherein:

the sub-system includes

a sub-system controller configured to create status data containing pieces of event information based on a signal output from the instrument and periodically transmit the status data to the monitoring device, the pieces of event information informing the monitoring device of a change in state of the instrument; and

a first memory configured to store a first event parameter file which defines a data structure of an event region of the status data, the event region being a region in which the pieces of event information are stored,

the monitoring device includes

a second memory configured to store the status data received from the sub-system controller and a second event parameter file defining the data structure of the event region contained in the status data; and

a monitoring device controller configured to monitor the operating state of the sub-system based on the status data,

when the first event parameter file is changed, and the sub-system controller creates the status data, the sub-system controller reconstructs the data structure of the event region based on the changed first event parameter file and resets the pieces of event information in accordance with the reconstructed data structure, and

when the second event parameter file is changed, and the monitoring device controller monitors the operating state of the sub-system, the monitoring device controller reconstructs the data structure of the event region based on the changed second event parameter file and interprets the pieces of event information in accordance with the reconstructed data structure.