摘要 |
<p>PURPOSE:To provide the monitor control system in which a cause on the occurrence of a communication fault between a monitor controller and a monitored controller is specified and the fault is relieved. CONSTITUTION:When a monitor controller 1 connecting to plural monitored controllers 2, 3 through communication lines 5, 6 cannot receive a reply signal from the monitored controllers 2, 3, the controller 1 controls a changeover section 4 to connect a transmission section and a reception section of its own equipment thereby implementing self-diagnosis and locating a cause to a fault. Moreover, it is possible to relieve a fault by selecting an active and a standby transmission reception section and confirming a communication state between its own equipment and the monitored controllers.</p> |