文档介绍：摘要(200字左右)
本文是基于变频器和PLC的桥式起重机控制系统,由运行机构、起重机构和活叉机构组成。起升和运行部分由变频调速控制,大车、小车的进退和货叉的升和降由相应的限位开关进行定位,由PLC程序进行整机控制。
首先分析和制定了生产线的整体设计思想和方案,并借鉴其他行业的自动控制技术确保该生产线系统具有自动控制的能力。采用西门子PLC S7-200进行自动化控制生产线,在综合分析和考虑硬软件的设计部分,给出了系统硬件的连接图,PLC的I/O借口的引脚分配表及整体程序流程图等。在该系统的控制部分中,实现了高可靠性,高性能,高稳定性,编程简单,易于实现,并且采用了广泛应用与工业生产中的PLC。通过详细分析输送设备保护控制电动机原理图、程序框图、PLC系统外部连接图。分析了整个高度自动化的输送系统的目标及功能,让高度制动化的输送系统的结构清晰、层次分明,并且具有非常强的实用性。
关键词:PLC,变频器,变频调速,自动控制
ABSTRACT
This article is based on frequency converter and PLC of the bridge crane control system, the running mechanism, hoisting mechanism and live fork. Lifting and running parts controlled by frequency control of motor speed, in a cart, trolley and pallet fork the rise and fall of the corresponding position limit switch, the machine by PLC program control.
First analysis and made the overall design idea and scheme of production line, and draw lessons from other industries in the automatic control technology to ensure that the system has the ability of automatic control of the production line. Siemens PLC S7-200 is adopted to improve the automation production line, in the hardware software design part of prehensive analysis and consideration, gives the system hardware connection diagram, PLC I/O excuse pinout chart and program flow chart, etc. In the control part of the system to achieve the high reliability, high performance, high stability, simple programming and easy to implement, and adopted PLC is widely used in industrial production. Through detailed analysis of transportation equipment protection principle diagram, program block diagram, PLC control motor system external connection diagram. Analyzed the goal and function of the highly automated conveying system, make highly brake transmission system structure is clear, distinct, and has very strong practicability.
Key words: PLC, frequency converter, frequency control, automatic control
目录
1 前言 1
PLC简介 1
1
2 搬运车简介 2
2
3
5
3变频器调速控制 9