Train data transmission system and train data transmission program

A computer-readable recording medium that stores therein a train data transmission program to control data transmission between a central control device of a train information management device provided in a front car of a train including a plurality of cars and a display device, the program being designed to cause a computer to execute:

• determining, by a necessary data information collection unit of the display device, data to be collected and outputting a result of determination to a memory size calculation unit of the display device;
• calculating, by the memory size calculation unit in response to receiving input of the result, a memory size by calculating, from the result, the number of pieces of data to be collected, and outputting a calculation result to a transmission data format generation unit of the display device;
• generating, by the transmission data format generation unit in response to receiving input of the calculation result, a transmission data format in accordance with the calculation result, and requesting data from the central control device using the transmission data format;
• storing, in response to receiving the transmission data format sent back from the central control device with the data written to the transmission data format, the data in a data storage unit of the display device via the necessary data information collection unit using the transmission data format sent back;
• and
• performing, by the data storage unit, a display process on a display unit of the display device in accordance with the data.