Field data monitoring module of distributed control system

摘要

The present invention relates to a field data monitoring module of a distributed control system that can monitor field data even in the case of a central control system or a communication abnormality, and a distributed control system including a central control system, a remote control system, a field data processing and an I / O board A data communication unit for transmitting on-site data and commonly connected to a communication line connecting the I / O board and the remote control system, a distributor for feeding data input through the data communication unit, data A first memory for storing field data; a second memory for storing field data monitoring and application-related programs; a second memory for storing field data monitoring and application-related programs; A liquid crystal display window for displaying the field data, A liquid crystal display window control unit for controlling the display operation of the liquid crystal display window in accordance with the field data and the control signal output from the CPU, a third memory for storing the field data output from the CPU to the liquid crystal display window control unit, And an external display device driving relay for informing the outside of the occurrence of the abnormality. Therefore, the safety and reliability of the distributed control system can be improved.