基于PCS7及SMPT-1000的蒸发器控制系统设计

摘要

This paper describes the design and implementation of evaporator control system based on experimental platform SMPT-1000. Siemens S7-400 PLC is used to be the core controller, In the Siemens PCS7 process control programming software environment, using a continuous function module (CFC) and sequential function modules (SFC) and simulation platform SMPT-1000 by controlling the evaporator outlet flow, level, temperature, to achieve a stable concentrate component control strategy. and using WinCC to Design configuration interface of the host computer, to achieve human-machine interaction and system monitoring. Also given hardware system architecture, connection and communication between PLC and field instrumentation. Experimental results show that the designed process control system is stable and has a strong anti-jamming capability. And small overshoot, fast response.%本文介绍了基于SMPT-1000实验平台蒸发器控制系统的设计和实现.以西门子S7-400系列PLC为核心控制器,使用西门子过程控制的编程软件PCS7中连续功能模块(CFC)和顺序功能模块(SFC)及仿真设备SMPT-1000,实现了蒸发器出口流量、液位、温度的控制策略.并采用WinCC作为上位机的组态软件,实现了人机交互和系统监控.同时给出了系统的硬件组成、PLC与现场仪表的连接方式和通讯方式.实验结果表明,所设计的过程控制系统运行稳定,具有较强的抗干扰能力.且超调量小,响应速度快.