| 摘要 |
PURPOSE:To enable to concentrically manage the control devices by providing a diagnosis display unit for displaying diagnosing information self-diagnosed by a control device. CONSTITUTION:An operation command outputted from a control instruction unit 12 is transmitted from a central station 9 to a terminal station 11, and control devices 5, 6, 7 are operated in response to the command. The devices 5, 6, 7 self- diagnose whether they normally operate or not by turning ON a power source. The diagnosing information of the devices 5, 6, 7 are transmitted through the station 11, a transmission line 4 and the station 9 to a diagnosis display unit 13. Thus, the states of the devices can be concentrically managed to readily discover a defective portion. |
