Research And Application In The-loop Simulation DCS Test System Based On The OPC Technique

DCS (Distributed Control System) as the most mature and advanced control system has been widely used in the petrochemical production process control. Therefore, the DCS test plays a extremely important role to ensure the security, reliability and economy, before the DCS is running or put into use. In this paper we focus on the construction of the DCS test system, based on the study of DCS test method, using the HILS and OPC technology, In the background of Petrochemical production process control.The distributed control system performance test which is an important means of DCS product acceptance, enables users to more clearly understand the performance evaluation of the DCS they purchased; The DCS performance test which is also an important means of DCS routine maintenance provides us with evidence for system upgrade; Relevant test data of the different brands and different types of DCS can also guide the selection of DCS in the future. In conclusion, only make the central control system DCS run reliably, can we ensure the production conducting safely, stably, scientifically.This study presents a set of the DCS test system commonly used on the basis of the research of the DCS test method. The hardware in the loop simulation structure which provides a test environment closed to reality make the test result closer to the state when the system is actually running. The simulation models developed for petrochemical production, which is more mature compared with the existing similar test system, is used to the test of DCS control effect. OPC communication technology bring about the internal communication of system, and its openness and versatility make the system more convenient and stable communication.The DCS test system in this subject the is mainly used for the DCS input output,network communication, loop control and logic control performance test. The test system and DCS once you are connected you will be able to test the performance, it is not necessary to repeat the wiring, remove debugging to work with, which will effectively raise the DCS test the speed and efficiency.