基于PROFIBUS-DP变频器通讯控制系统设计自控系毕业论文(1).docx

Abstract Abstract 摘要 摘要 摘 要 在造纸机中，同步控制和纸张力控制是造纸机控制中极为重要的一环。本 文就是以西门子 S7-300 PLC和基于PROFIBUSP-DP勺MM44（变频器组合的控制 方案在造纸过程中实现多电机同步传动，提出适于 PLC控制的、能在纸传动过 程中实现高精度稳速控制及恒张力控制的控制方案。该方案建立了过程运行参 数与控制目标的准确定量关系，既没有理论误差，又避免了多电机的性能差异 及负载波动等对控制的影响，为实现造纸机多电机高精度同步传动提供了技术 手段。 本文所研究的基于 PROFIBUSP-D变频器造纸机械控制系统采用 PLC来控制 变频器调速，充分发挥 PROFIBUSP-D模块的高可靠性、灵活性、通用性、扩展 性等优点，通过RS485传输技术建立 PLC与变频器的PROFIBUSP-D通讯进而完 成PLC控制变频器调速系统的方案设计和全部的控制系统设计。 关键词：PLC ; PROFIBUSP_D变频器 ：：：：；：；一；：；：：；：； ABSTRACT In the paper mach ine, synchronous con trol and paper tension con trol in paper high precisi on steady speed control and con sta nt tension con trol method. Themachi ne control is a very importa nt link in. This article is based on Sieme ns S7-200PLC and Sieme ns MM440 con verter comb ined con trol scheme in the paper_mak ing process multi motor synchronous drive, put forward suitable for PLC con trol, i n the paper the tran smissi on process achieves plan to establish the process parameters and the control goal of accurate quantitative relation, neither theory error, but also avoid the multi motor performa nee differe nces and load fluctuati on on con trol effect, for the realizati on of paper machine with multi high precision synchronous transmission provides technical mea ns In this paper, the study by AC motor speed con trol system using PLC to con trol the frequency converter speed contro, programmable logic controller and give fullplay to the high reliability , flexibility,versatility , scalability, etc, through the PLC switches to con trol the volume of in put and output modules multi-f un cti onal inv erter in put to achieve the multi-stage motor speed con trql duri ng the RS485 tran smissi on tech no logy through the establishme nt of the PLC and in verter PROFIBUSP-DP commu nication to complete the PLC con trol program inv erter speed con trol system desig n and all of the con trol system desig n. Keywords: The alternating current; PLC; PROFIBUSP-DP communication 目录 目录 PAGE PAGE # 目 录 第1章绪论 .1 1.