| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of signal lines required for connecting respective signal processing systems, to miniaturize the configuration of a hardware and to improve reliability by outputting one pattern signal corresponding to an operating state after switching through one signal line to the other signal processing system, switching and controlling the operating state of the other signal processing system. SOLUTION: When a controller 200 (or 210) of a low-order device switching the state according to the instruction of a maintenance device 1 as a high-order device is to report the switching of state of a present system to a controller 210 (or 200) of the other system paired with the present system, the width of a pulse to be sent through one signal line is switched corresponding to the state. Therefore, only by sending the pattern signal corresponding to the operating state after switching through one signal line to the other signal processing system, the switching generation of the operating state and the contents of the operating state after switching can be reported to the other signal processing system so that the required number of signal lines can be reduced to one. |
