Real time data interaction mechanism of large PLC production line

With the expansion of modern production line, especially the proposal of the concept of flexible production line, there are more and more production lines in the actual production realization, and more and more signals need to be controlled, which requires multiple PLCs to be connected in the production line in order to realize the required actual control operation. In this case, the configuration software can not control the production line, so it is necessary to comprehensively schedule and control the whole production line in the computer to realize the real-time control of the production line. Next, taking the German Beckhoff PLC as an example, the TwinCAT3 provided by Beckhoff is used to communicate with the underlying equipment through the computer. Due to the large number of interfaces that need to be controlled in the flexible production line, this paper adopts the adaptive mode of multi-threaded parallel processing to realize the real-time information interaction between the computer operation interface and the underlying equipment.