A New Solution of Concurrent Field Bus

The paper presented a new technology of industrial field concurrent bus communication. Based on direct sequence spread spectrum, frequency division multiaddress and cross correlation as necessary auxiliary method,it realized a new concurrent field bus communication. The purpose of this study was to overcome common fault existed in communication mode of industrial control field such as 485/232 or CAN field bus,etc. The typical fault was that multiple remote data terminal units (terminals) were not allowed to upload data at the same time or to report the status of themselves initiatively.The technology discussed in the paper allowed the terminals communicate with master PC simultaneously under the new communication mode, when the trouble occurred at monitored equipment, the fault information would be transmitted to control center promptly and actively.