| 摘要 |
PURPOSE:To back up a fault of a controller by a manual operation when a trouble is generated in a processor of the controller, by executing the function of the processor for a processor of an interface and applying the contents stored in a memory to an operation center. CONSTITUTION:IF a trouble is generated in the processor CPUm of the controller CT, the function of the processor CPUm is executed by the processor CPUs of the interface and data corresponding to an analog output AO and a digital output DO from the operation center OS are applied to an I/O circuit I/Om. In addition, data indicating an analog input AI and a digital input DI from the I/O circuit I/Om are applied to the operation center OS. Being provided with an analog-to-digital converter, the I/O circuit I/Om repeats the operation to convert the analog input AI into a digital signal and store the converted digital signal once in a variable memory RAMm periodically and reads out the stored contents when necessary to apply them to the operation center OS. |
