| 摘要 |
<p>PURPOSE:To provide a control equipment capable of automatically controlling a plant even at the time of a maintenance operation for inspecting the function of the control equipment and to provide a device for automatically executing the inspection of the control equipment. CONSTITUTION:This control equipment 90 is provided with an analog input circuit 4 and a digital input circuit 5 for fetching input signals As and Bs for control, an analog output circuit 7 and a digital output circuit 8 for outputting output signals 7a and 8a exclusive for maintenance in a time-division manner along with the output signals Cs and Bs for control and a shared signal selection means 21. Then, arithmetic processing units 6 and 25 output known data for output for the maintenance in the time-division manner along with signals for the output for the control. A maintenance device 1 fetches the signals 7a and 8a, compares and judges the fetched result and the known data and thus, automatically executes the maintenance inspection of the control equipment 90 while continuing the control of the plant and outputs a result.</p> |
