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针对煤粉制备系统过程工艺复杂、控制点数多、设备连锁和安全性要求高等特点,设计出基于S7-300 PLC为核心的稳定、高效和经济的硬件系统,利用PROFIBUS-DP现场总线和工业以太网技术构建了下位控制层和上位监控层两层网络架构,完成系统硬件和软件设计,利用Win CC强大的组态功能建立了友好人机交换界面。整个控制系统结构层次清晰、功能分布明确,既体现了分散控制和集中管理的设计指导思想,更体现了控制系统的开放性和互换性的技术优势。经过实践证明,该系统运行稳定可靠,操作简单,提高了生产效率和煤粉质量,能够满足实际生产要求,达到了预期设计的目标。
In view of the complex process, the control points and the equipment interlocking and safety requirements of coal preparation system, a stable, efficient and economical hardware system based on S7-300 PLC is designed. By using PROFIBUS-DP fieldbus and industrial Ethernet Network technology to build the lower control layer and the upper control layer two-tier network architecture to complete the system hardware and software design, the use of Win CC powerful configuration capabilities to establish a friendly man-machine interface. The entire control system has a clear structure and a clear distribution of functions. It not only embodies the design guidelines for decentralized control and centralized management, but also embodies the technical advantages of openness and interchangeability of the control system. The practice proved that the system is stable and reliable operation, simple operation, improve production efficiency and pulverized coal quality, to meet the actual production requirements, to achieve the desired design goals.