PLC控制多種液体混合控制系统.doc

掺混PLC控制系统 摘 要：可编程序控制器（Programmable controller）简称PLC，是近年来一种极为迅速，应用极为广泛的工业控制装置。它是一种专为工业环境应用而设计的数字运行的电子系统，它采用可编程程序的存储器，用来存储用户指令，通过数字或模拟的输入/输出完成确定的逻辑顺序、定时、记数、运算和一些确定的功能来控制各种类型的机械或生产过程。 由于PLC的性能优越，兼具计算机的功能完备，灵活性强，通用性好和继电接触器控制简单易懂，维修方便等双重优点，形成以微电脑为核心的电子控制设备。可编程序控制器技术在世界上己广泛应用，成为自动化系统中的基本电控装置PLC在现代工业生产和实际生活中有着广泛的应用，由于可编程控制器（PLC）具有编程软件采自易学易懂的梯形图语言、控制灵活方便、抗干扰能力强、运行稳定可靠等特点，现在的工业自动化生产控制多采用可编程控制器来实现。 该掺混控制系统，根据实际要求利用PLC的实时控制和顺序处理功能，完成系统控制，。在本次论文中，给出了控制系统的硬件原理图，主电路图及软件设计。 关键词：可编程序控制器、存储器、计算机技术。 Hybrid Control System Implemented by Programmable Logical controller Abstract：This design introduced the unction and merits of the FX2N PLC,and electrical appliance linearize Control system which digital shouing has high efficiency ,low cost on the core of FX2N PLC.Programmable controller short for PLC,it’s aspcial digital running electrican system which design for industry circumstances.It adopt programmable controller memory ,used for memory user’s instruction which through digital or analog’s input/output to finish definitely function to control various machines or produce process. Because PLC has outstanding function, also has perfect function competence, plus flexibility better current use of computer’s Form electronic control equipment which core on microcomputer PLC control technology was used wide-ranging in world , become basic electricity control device in the Automation system PLC has extensive use in industry product of contemporary age and practice. Because PLC has so many merits, now industry products mostly adopt PLC to bring about . In fact the self control regular , but yell is random only use sequence control or logical control can’t satisfy the request of control . So this system adopts the control pattern which is of random logical ability . This control system , based on the request of practice adopts the PLC’s merits to finish the control of system; this thesis has the system’s scheme of hardware main circuit diagram and software design.