plc课程设计报告

management systems and measures established by, and a number of pragmatic, combined part-time workforce education information, the protection of the digital campus construction and sustainable development. Six Bureau attaches great importance to information technology security, information technology security, entrust XX City Center for educational information and equipment dedicated to the work. Network security leading group was set up, chaired by the Education Bureau Chief, head, for XX education Metro-network and information security emergency response leadership. Deputy group leader for XX educational metropolitan area network and information security emergency response coordination, command. The team assist leader and deputy leader, responsible for network XX network security and information . Team. Information security work Conference held each semester, and deployment of information security of documents issued on a regular basis. Information security assessment is included in the annual index. Strictly implement the information security budget to ensure information security of investment. By XX, education information and equipment Centre XX network network security and information security. According to the information technology security requirements, issued a document requires schools (units) implement, defined the information security guidelines, specific work practices, procedures, and requirements. Clear industry information security incidents (accidents) to detect, report and disposal processes. According to self-examination, the school (units) basic established has network security management system; the school (units) according to this units actual, established has units personnel management, information system room management, and equipment management, and media management, and network security construction management, and shipped dimension management, and service outsourcing, management system; developed has computer and the network of network security responsibility held system, signed has network security responsibility; website of information management personnel is responsible for confidential management, password management, on computer enjoys independent right, User name and password of the computer for its proprietary, and release of provisions is prohibited, such as leaks, investigated for responsibility. According to who is in charge of whos in charge, who is running and who is responsible for, who uses principles of who is in charge of management schools (units) defined the roles and responsibilities of information security, assurance responsibilities to schools. XX city schools (units) total site 20, 19 of which were not classified security protection assessment, of which 1 (XX education and resource network) for classified security protection levels, without third-level information systems. Total education information systems 1 (XX education cloud platform), contains features with e-Government, resource library, test database, mail services, such as e-books, all intranet services. No for grade protection grading record and evaluation of school (units), requirements the school (units) according to information security grade protection about policy and standard, organization carried out information security grade protection security management system construction, and technology measures construction and grade evaluation, implementation grade protection system of the requirements, makes information system security management level obviouslyfacility up to 160 million Yuan, according to the standard, high quality planning XX educational metropolitan area network realizes Wan Zhaokuan to schools, hundreds of megabytes of broadband to the table, wire (ie: Web, video, audio) to the target, electronic whiteboards, multimedia classrooms, remote interactive video teaching system of modern educational equipment in the classroom. . With Intel company on XX Education City domain network of topic case design, relies on Cisco company thought Shu aid chuan project staff free provides has three years technology support, from 2009 began, according to high standards, and high of work thought, and manpower planning, and points step implementation, using school earthquake Hou reconstruction of opportunities, again planning elementary and middle schools campus network and education city domain network, and local broadcasting network company cooperation, using broadcast TV network, will physical fiber laying to each school, to minimum of cost achieved has physical fiber school school pass; Each school construction standards of campus network and network access to all rooms; XX education metropolitan area network center machine room equipment in the Ministry of education standardization management platform, the Central Library of audio-visual education resources, set up a Chinese teacher education cloud platform, implemented links the two platforms. At present, the citys primary and middle school students to computer 3198, vitality than 10:1; 809 equipment classes through the classroom (primary and secondary); 36 of the campus network. The establishment of an advanced, practical Gigabit educational metropolitan area network, the citys schools have access to educational metropolitan area network, schools have computer networks, closed-circuit television network, broadcast networks into the classrooms, realize the triple play. Schools share Internet bandwidth, can meet the needs of teaching of the school office and at any time. According to Ministry of education on full started implementation teaching points digital education resources full cover project of notification (taught technical letter (2012) 74th,) and XX Province Department of education on issued XX province teaching points digital education resources full cover project implementation views of notification (chuan taught letter (2013) 18th,) requirements, I city 6 a teaching points implementation teaching points digital education resources full cover project, combined I city specific situation, developed issued has XX City Bureau on teaching points digital resources full cover project of implementation programme, Established XX, full coverage of digital resources in modern distance education teaching project leading group, XX, chaired the Secretary for education. Established, digital resources in modern distance education teaching, XX full coverage project group, XX, Director of the Center for educational information and equipment chaired Zhu Guiyan, responsible for distance education digital resources covering project work. Projects in XX city school digital resources in modern distance education teaching full-coverage project leading group, digital resources in modern distance education teaching, and XX full coverage project group leadership and organization, in accordance with the unified arrangement of the whole province, responsible for university education digital resources covering project management and implementation. According to provinces arrangements, I Center has arrangements Gong第3章 运料小车的控制系统论证3.1 运料小车的介绍与控制要求运料小车模拟图如图2-1。图2-1运料小车运料小车是工业送料的主要设备之一。广泛应用于自动生产线、 冶金、有色盒属、煤矿、港口、码头等行业，各工序之间的物品常用有轨小车来转运。小车通常采用电动机驱动，电动机正转小车前进，电动机反转小车后退。图2-1是一个运料小车工作示图。系统的设计要求为：小车由电机驱动，可在A、B两地分别启动，A地启动后，小车先返回限位开关ST1处，停车20s装料；然后自动驶往B点，到达限位开关ST2处后停车，底门电磁铁动作，卸料30s，然后返回A点，停车20s装料，如此反复。3.2 运料小车控制系统的控制内容与要求3.2.1 运料小车的控制系统主回路运料小车由一台三相异步电动机拖动，电机正转，小车向左行，电机反转，小向右行。电动机正反转主回路如图3-1所示。图3-1 三相异步电动机正反转电路图在生产线上装料点A、卸料点B分别装有行程开关，以判别小车是否到达位置。另外对小车还需要一个总停按钮，两个启动按钮。3.2.2 设备控制要求运料小车在自动化生产线上运动的控制要求如下：(1) 按下启动按钮，系统开始工作，按下停止按钮，系统停止工作(2) 可在A、B两地分别启动(3) A地启动后，小车先返回限位开关ST1处，停车20s装料(4) 然后自动驶往B点，到达限位开关ST2处后停车，底门电磁铁动作，卸料30s(5) 然后返回A点，停车20s装料，如此反复3.2.3 运料小车控制系统控制回路传统运料小车大都是继电器控制。根据3.2.2设备控制的要求，以继电器为主的运料小车控制系统的控制回路如图3-2所示。图3-2 运料小车的继电器控制回路3.3 方案论证早期运料小车电气控制系统多为继电器-接触器组成的复杂系统，这种系统存在设计周期长、体积大、成本高等缺陷，几乎无数据处理和通信功能，必须有专人负责操作。后来，单片机应用到运料小车控制系统中。单片机有优异的性能价格比、集成度高、体积小、有很高的可靠性、控制功能强、低功耗、低电压，便于生产便携式产品，外部总线增加了IC及SPI，单片机的系统扩展和系统配置较典型、规范，容易构成各种规模的应用系统。单片机编程方法复杂，不容易上手，使用于简单应用。将PLC应用到运料小车电气控制系统，可实现运料小车的自动化控制，降低系统的运行费用。PLC运料小车电气控制系统具有连线简单，控制速度快，精度高，可靠性和可维护性好，安装、维修和改造方便等优点。运料小车控制流程图如图3-4所示。图3-4 运料小车控制流程图运料小车控制系统的控制系统构成图如图3-3所示。图3-3 运料小车控制系统图第4章 运料小车控制系统总体设计4.1 PLC的选用根据运料小车输入输出设备的分配，在I/O方面只需要6个输入口和3个输出口，同时考虑适当的余量，选用FX2N-16MR的PLC即可。4.2 PLC外部接线图运料小车由一台三相异步电动机拖动，电机正转，小车向左行，电机反转，小向右行。小车控制系统的输入，输出设备与PLC的I/O端对应的外部接线图如图4-1所示。图4-1 运料小车PLC外部接线图4.3 I/O分配这个控制系统的输入有2个启动按钮开关、停止按钮开关、2个行程开关、热继电器共6输入点。这个控制系统需要控制的外部设备只有控制小车运动的三相电动机一个。电机有正转和反转两个状态，分别都应正转继电器和反转继电器，另外还有一个输出控制卸料电磁铁开关，所以输出点应该有3个。对应的地址分配表如表4-1所示。表4-1 PLC I/O分配输入信号输出信号 名称 代号 输入点编号 名称 代号 输出点编号总停按钮 SB1 X000正转接触器 KM1 Y000正转启动按钮 SB2 X001反转接触器 KM2 Y001反转启动按钮 SB3 X002卸料电磁铁 KM3 Y002行程开关 ST1 X003行程开关 ST2 X004热继电器 KR X0054.4 PLC状态流程根据运料小车运动控制的要求， 按下启动按钮SB1后，运料小车系统开始工作，碰到装料点A的行程开关并开始进行装料，20S装料结束后小车自动右行。碰到卸料点B的行程开关后停车并卸料，30S后卸料完毕小车左行，碰到装料点A的行程开关时，小车停止并装料，如此反复。4.5 运料小车控制系统梯形图图4-3 运料小车控制系统梯形图根据小车运动的控制要求，画出小车控制系统的梯形图如图4-3所示。4.6 运料小车控制系统语句表根据图4-3梯形图 写出与之相对应的语句表如下：0 LD X0011 OR Y0002 OR T13 ANI X0004 ANI M15 ANI X0036 ANI Y0017 OUT Y0008 LDI X0009 AND X00310 OUT T0 K20011 LD X00212 OR Y00113 OR T014 ANI X00015 ANI M116 ANI X00417 ANI Y00018 OUT Y00119 LDI X00020 AND X00421 OUT T1 K30022 OUT Y00223 LDI X00024 AND X00525 OUT M126 END第5章 总结早期运料小车电气控制系统多为继电器-接触器组成的复杂系统，这种系统存在设计周期长、体积大、成本高等缺陷，几乎无数据处理和通信功能，必须有专人负责操作。将PLC应用到运料小车电气控制系统，可实现运料小车的自动化控制，降低系统的运行费用。PLC运料小车电气控制系统具有连线简单，控制速度快，精度高，可靠性和可维护性好，安装、维修和改造方便等优点。本设计运用的可编程控制器实现的运料小车自动控制，避开了以往继电器接触不良、开关易损坏等缺点，可靠性和稳定性都有所提高。在检测小车是否到达装料、卸料点的时候，运用了行程开关，这样的检验系统让小车的停靠位置更加准确。与此同时，由于输入输出很明显，不需要好多额外的外接电路，让设计更简洁。这也是采用了成熟的可编程控制器带来的好处。即使在出现故障、紧急停止等环节中都能快捷操作。但设计过程中，只是基本实现了设计的要求，没有功能扩展，让系统显得比较简单。在实际的运用过程中，为了便于智能化、无人化、远程化的操作，该设计控制器还应该联网，让多台控制器组成局域网，构成一套网路系统，便于通讯和控制操作。如修改软件设计中的一些参数，能适合在不同的场合都能适合。在具体的设计中，应该还可以设计显示功能，显示运料小车到达指定的装料、卸料点时所需时间；还可以在小车底部安装一个传感器，用来检测小车中的料是否卸完。这样就可更好地控制小车的运行，更加便于人们工作。此外，该运料小车控制器可以运用于大型的养殖行业，便于送料和喂养。这样就可以节约时间，提高效率。随着经济的不断发展，运料小车的应用也不断扩大到各个领域，从手动到自动，逐渐形成了机械化、自动化。但是，传统的继电器接触器控制在工作中已经暴露出种种弊端，因此，新的控制设计已成为社会发展的必然趋势。本设计运用的可编程控制器实现的自动运料小车控制器，避开了以往继电器接触不良、开关易损坏等缺点，可靠性和稳定性都有所提高。在检测小车是否到装料、卸料点的时候，运用了行程开关使小车的停靠位置更加准确。同时，由于输入输出很明显，不需要好多额外的外接电路，让设计更简洁。这也是采用了成熟的可编程控制器带来的好处。即使在出现故障、紧急停止等环节中都能快捷操作。参考文献1 王也仿.可编程控制器应用技术.机械工业出版社,2001年.2 戴一平.可编程控制器技术及应用.机械工业出版社,2004年.3 何友华.可编程控制器及常用控制电路M.冶金工业出版社,2008年.4 熊幸明.工厂电气控制技术.清华大学出版社M,2005年.5 胡学林.可编程控制器应用技术M.高等教育出版社,2003年.6 刘柏生.PLC编程实用指南M.机械工业出版社,2007年.7 鱼雷声.电气控制与PLC应用.机械工业出版社,2003年.8 章文浩.可编程控制器原理及实验.国防工业出版社,2003年.9 黄云龙.可编程控制器教程.机械工业出版社,2003年.10 吴丽.电气控制与PLC实用教程.黄河水利出版社,2005年.外商投资企业需改变登记注册事项,应当及时办理变更登记。变更项目应在报经原审批机关批准后30天内向登记主管机关申请办理变更登记。improve, security prevention capacity obviously enhanced, security hidden and security accident obviously reduced, effective guarantees information health development. XX Education Centre regularly carry out day-to-day network security monitoring information and equipment. By the appropriate technical staff, XX network engine room maintenance staff on site management and maintenance on a regular basis, scheduled viewing of networks, systems, databases and associated equipment operating conditions, and make a record. Computer lab maintenance managers regularly run a variety of devices in the school information system parameters, server systems and various data backup, so that there was a hardware failure in a system crash can resume quickly and efficiently. Computer lab maintenance managers establish a network antivirus system, Avira Virus system on a regular basis, and anti-virus software security assessment, time to upgrade. Computer lab maintenance management for all equipment in the room a regular dust, replace the old label. Regularly host servers, network switches, core routing, firewalls, hardware maintenance, such as equipment failure, should be processed in a timely manner in order to ensure safe and reliable operation of the system. In XX city information and equipment was established within the Centre, educational metropolitan area network center machine room XX. Servers and data stores and applications to set up in XX City metropolitan area network center machine room. WindowsServer2003, windowsServer2008, windowsServer2012, Linux, the operating system, the database for SQL Server2008, Office software, such as Microsoft Office software. Schools (units) of computer, information system security products for domestic products, including the use of 360 and kingsoft Internet security software. XX education metropolitan area network used by the server for HP, firewall and information security product for Huawei and Cisco products. In their daily work, to publicize related knowledge and information security considerations. Enhanced global awareness of network and information security, and strive to achieve network everyone knows security and virus before the guard, to improve network and information security, ensure that the XX education system network and information system security. Tracking reporting system requires all parties to strengthen collaboration, work closely with emergency safety plan developed XX education metropolitan area network, regularly carry out emergency drills, and carried out special funds every year to protect the security of information. Annual 2-3 professional training for network managers in the city, forming technology with a strong professional and technical team, school network managers on common network failures and be capable of solving security issues. Issues that cannot be resolved, timely forms of meetings, such as meetings, analysis, and solutions through a meeting, without rolling up the ability to solve problems, and feedback to superiors in writing departments to resolve. Through self-examination, we are well aware, relative lack of investment in education, facilities and equipment for further updates, education development is still uneven, new education concepts need to be further enhanced to some extent and restricting the development of city education. We will take the opportunity of government supervision, to strive for the province education demonstration counties as a driving force, further increase input in education, efforts to promote thelong wing, and Li Wanfu, and Michael Jenkins, and Chen Jian, and Song and xiaochuanyun, 7 bit comrade participate in province backbone face-to-face or network learning, do each teaching points are has teachers participate in training, October 17, 2013, issued XX city education information and equipment Center on requirements the teaching points school for good satellite ground station installation prepared of notification, requirements school related management personnel familiar XX province teaching points digital education resources full cover project construction management manual, Particularly with regard to installation preparation parts according to the point of XX province full coverage of digital educational resources in the project construction management manual . Devices are able to receive TV signals and IP data, the schools have school training and school-based application to use good. Actively organize implementation of a division of a class, a teacher in one class activity. XX in XX city first to complete full registration of teachers working in this city, XX, Sun class rate of 54 per cent respectively, the forefront. In XX, a division of a class, a class a total ranked first in Division activities, was awarded the national ministerial one, 2 provincial second prize, third prize at the provincial level 3. Actively organize implementation of the e-learning space the work of everyone. At present, in the open space of public service platform of provincial educational resources teachers number 2444, 83 to the total number of teachers, student number is 6569 of the open space, the citys total students 18.31 to (junior high school students in 30 above, students not required), registration number to meet the requirements of teachers and students, in XX in first place. Five, information technology application capability as a means to boost teaching of teachers to use information, Education Bureau of XX title and modern educational technology teacher assessment levels linked to the examination; launched a provincial model school of modern education technology selection, advanced unit in education a year (individual) award. To expedite education informatization work, the city established the school running level of supervision and assessment system. Information education in school performance evaluation, education assessment information work more than to cut weight 10. Practice is a regular room supervision, education information steering, steering, steering with the end, principals of education information into performance assessment and school level monitoring and evaluation, to develop a scientific, operational education information steering assessment methods, tracking management of education information and applications. By March 2016, 100 of the teachers, I participated in a national educational technology training for primary and secondary school teachers, the teachers have made to cut 80 primary and middle school teachers educational technology proficiency test certificate. At present, all schools have access to broadband networks. Training classification training of teachers, school teachers, academic leaders, information technology, teacher training and network management personnel from the County, within the school back to school training once training is complete. Through this mode of classification training, information technology application capability training of teachers in our city reached 100. XX series of effective information