| 摘要 |
<p>PURPOSE:To avoid the input of improper data to a plant monitor and to eliminate a temporary transmission error by providing a timer generating a pulse signal at a longer period than the transmission interval from a remote input section. CONSTITUTION:A timer 15 generates a pulse signal SC at a period Tt slightly longer than the data transfer period from a transmission section 5 to a reception section 7 and the pulse signal SC is outputted to an input control section 8. Furthermore, the timer 15 starts its operation when a timer start signal TS is applied from the input control section 8 and stops its operation when the timer stop signal TF is applied from the input control section 8. Thus, only when normal data are settled and the data is subject to DMA transfer, the data is inputted to a plant monitor. Moreover, if any data error is caused in the received data, the transmission error is avoided and when a reception data not including any error is obtained, since the received data is transferred to the plant monitor 9, the plant operation monitor of the plant monitor device is continued.</p> |
