| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a program rewriting system of an air-condition controller for a railway vehicle, capable of efficiently rewriting a control program by utilizing a communication network of multiple layers, which is equipped in the railway vehicle, regardless of the communication layer to which the air-condition controller is connected. <P>SOLUTION: A master slave type communication network 200 is formed, by the program rewriting instruction device 100 as a highest rank master node and by the air-condition controller C as a slave node. The program rewriting instruction device 100 transmits the control program, to be rewritten for the air-condition controller C, to a gate way node. When the control program is received, the gate way node performs, in the subordinate layer of the gate way node itself, the multicast of the received control program to a gate way node or the air-condition controller C, and the air-condition controller C, which receives the control program, performs rewriting on the received control program. <P>COPYRIGHT: (C)2012,JPO&INPIT |
