Research On The System Of PC--PLC Blending Claimer

This paper was from Wuhan Iron and Steel Corporation's Wugang Industry Port. As the most important raw and processed material basement, Wugang Industry Port makes great influence on Wugang's survival and development especially through its manufacture efficiency and operation condition. In response for their demand, we made an overall electric upgrade on its key installation of the material basement QLG1500₄0A roller blending reclaimer. This system was designed as the PC-PLC structure. This paper contains such chapters as follows: the overall design of the system, the design of transmission department, the design of control department, the monitor and control department to PC.At first, this paper introduced the overall design of the system, the structure, the principle of its operation, then a detailed study and analysis was made according to the original one, give the reasons and measurements. The on-time automatic correcting theory was brought forward aiming at solving the problem of line unsynchronization-the key problem of the system.At second, when undertaking the task, the request to the walking rate was not so strict, while when moving back, the request was strict, the ration of it goes to 250:1.TPD32 was chosen out after some analysis and comparison of DC timing. The soft starter style was chosen on the thought of when start induction motor it is better to reduce the starting current in case of excessive wallop. Some intense analysis was made on the technology of soft starter.Then it goes to the part of the control department, because the system calls for a very high reliability and stability, according to the principle of high-tech, economy, reliant and the actual situation of the user, Schneider Company's Quantum series PLC can be the best choose. The selection of PLC, the distribution of I/O, build network to communicate, the design of application programs and the points for attention during installation and maintenance after the PLC'S main function and operation principle was first outlined.In the chapter of PC monitor and control, the frame production, the cartoonconnection, the on-time database, the coming out of reports, the hitch alarming and the data exchange with EXCEL were introduced on the basic of actual application using. The monitor and control on the spot and data collection have been improved a lot.This system has been put into practice and always in good conditions. It has improved the working efficiency extremely, with high economic profits returning. All users praise it.