输送均匀铺料设备控制系统HMI制作与实现毕业论文.doc

毕业设计材料目录 输送、均匀铺料设备控制系统（HMI制作与实现）1.毕业设计任务书-12.外文翻译-23.毕业实践调研报告-154.毕业设计说明书-165.参考文献-506.毕业设计总结-517.附录-52课题名称 输送、均匀铺料设备控制系统（HMI制作与实现） 课题需要完成的任务：1、根据系统配置，完成电路图绘制、网孔板元器件布置图绘制、设备互联接线图绘制；2、根据电路图安装设备载体电气元器件；3、协同团队其他成员进行安装规范检查、标准化检查；4、完成触摸屏程序编制、通信电缆制作、无协议通信模式程序编制及调试；5、协同团队其他成员实现模块与模块互联、自动化系统与设备载体互联；6、协同团队其他成员进行安全检查、通电初调、硬件实物与图纸检查；7、协同团队其他成员进行系统联调；8、制作课题答辩PPT，在答辩过程中完成功能演示和功能讲解。课题计划：2.273.07 完成电路图、元器件布置图和接线图的设计与绘制；3.083.14 完成设备载体电气元器件安装与接线，进行规范和标准化检查；3.153.21 完成触摸屏程序、无协议通信模式程序编制并进行初调；3.224.11 完成模块互联、控制系统与载体互联调试，进行相关检查；4.124.18 完成系统联调，开始书写毕业设计说明书；4.184.30 完善说明书，制作答辩材料，准备答辩。自动控制技术系 （部、分院） 2010 年 2 月 20 日英文翻译英文How to Use Online Help (GS 1.3)Context-Sensitive HelpSelect the menu item, or open the dialog box, for which you want help and press the F1 key to access the context-sensitive help for that topic. (In some cases, you can press Shift and F1 to access a help topic.)Help from the MenuThe Help menu in STEP 7-Micro/WIN offers the following selections:Contents and Index allows you to navigate this help system by means of a Contents browser (showing which books contain which topics) or a searchable index.Whats This? provides definitions of interface elements. You can also access Whats This? help by pressing the shift and F1 keys simultaneously. The cursor changes to a question mark; use it to click on the item for which you want help.S7-200 on the Web provides access to Siemens Internet websites for technical support and product information.About lists product and copyright information for STEP 7-Micro/WIN.The Contents BrowserFrom STEP 7-Micro/WIN, you can bring up the Contents browser by choosing HelpContents and Index from the menu bar.From inside a help topic, you can bring up the Contents browser by clicking on the Help Topics button.The IndexFor an alphabetical listing of topic keywords, select the Index tab in the Contents browser.How to Print HelpYou can print topics from the Contents browser or from inside an individual topic:To print all of the topics in a book from the Contents browser, select the book title and use the Print button at the base of the browser.To print an individual topic from the Contents browser, select the topic title and use the Print button at the base of the browser.To print from inside an individual topic, use the Print button that is located above the topic title.Note:The topics in the Getting Started section of Help are numbered sequentially, like sections of a manual, in order to make it easier for you to use this material in printed format.What Are My Communication ChoicesThe S7-200 CPUs support one or more of the following communication capabilities that allow you to configure your network for the performance and functionality that your application requires.Your network can support one or more of the following communication protocols:Point-to-Point Interface (PPI)Multi-Point Interface (MPI)PROFIBUSBased on the Open System Interconnection (OSI) seven-layer model of communications architecture, these protocols are implemented on a token ring network, which conforms to the PROFIBUS standard as defined in the European Standard EN 50170. These protocols are asynchronous, character-based protocols with one start bit, eight data bits, even parity, and one stop bit. Communication frames depend upon special start and stop characters, source and destination station addresses, frame length, and a checksum for data integrity. The protocols can run on a network simultaneously without interfering with each other, as long as the baud rate is the same for each protocol.Refer to the PG / PC to S7-200 CPU Communication Options Tables for a summary of communication connection possibilities.PPI ProtocolBack to Top PPI is a master-slave protocol: the master devices send requests to the slave devices, and the slave devices respond. Slave devices do not initiate messages, but wait until a master sends them a request or polls them for a response. Masters communicate to slaves by means of a shared connection, which is managed by the PPI protocol. PPI does not limit the number of masters that can communicate with any one slave; however, you cannot install more than 32 masters on the network.Selecting PPI Advanced allows network devices to establish a logical connection between the devices. With PPI Advanced, there are a limited number of connections supplied by each device. The table below shows the number of connections supported by the S7-200.S7-200 CPUs can act as master devices while they are in RUN mode if you enable PPI master mode in the user program. After enabling PPI master mode, you can use the Network Read (NETR) or the Network Write (NETW) to read from or write to other S7-200 CPUs. While the S7-200 is acting as a PPI master, it still responds as a slave to requests from other masters. You can use PPI protocol to communicate with all S7-200 CPUs. To communicate with an EM 277, you must enable PPI Advanced.ModuleBaud RateConnectionsS7-200 CPU Port 0 Port 19.6 kbaud, 19.2 kbaud, or 187.5 kbaud9.6 kbaud, 19.2 kbaud, or 187.5 kbaud44EM 277 Module9.6 kbaud to 12 Mbaud6 per moduleFollow these steps to set up the PPI parameters:1.On the PPI tab, in the Station Parameters area, select a number in the Address box. This number indicates where you want STEP 7-Micro/WIN to reside on the programmable controller network. The default station address for the personal computer on which you are running STEP 7-Micro/WIN is station address 0. The default station address for the first PLC on your network is station address 2. Each device (PC, PLC, etc.) on your network must have a unique station address; do not assign the same address to multiple devices.2.Select a value in the Timeout box. This value represents the length of time that you want the communications drivers to spend to attempt to establish connections. The default value should be sufficient.3.Determine whether you want STEP 7-Micro/WIN to participate on a network that has multiple masters. You can leave the check mark in the Multiple Master Network box unless you are using a modem or Windows NT 4.0. In that case, the box cannot be selected because STEP 7-Micro/WIN does not support that functionality.4.Set the transmission rate at which you want STEP 7-Micro/WIN to communicate over the network. The PPI cable supports 9.6 kbaud, 19.2 kbaud and 187.5 kbaud. 5.Select the highest station (node) address. This is the address where STEP 7-Micro/WIN stops looking for other masters on the network.Figure 7 Properties ?PC/PPI Cable (PPI) Dialog, PPI Tab6.Click the Local Connection tab. See Figure 8.7.In the Local Connection tab, select the COM port to which your PC/PPI cable is connected. If you are using a modem, select the COM port to which the modem is connected and select the Use Modem check box.8.Click OK to exit the Set the PG/PC Interface dialog.Figure 8 Properties ?PC/PPI Cable (PPI) Dialog, Local Connection TabNOTES:STEP 7-Micro/WIN defaults to multiple-master PPI protocol when communicating to S7-200 CPUs. This protocol allows STEP 7-Micro/WIN to co-exist with other master devices (Text Displays and Operator Panels) on a network. This mode is enabled by checking the Multiple Master Network check box on the PC/PPI Cable Properties dialog in the PG/PC Interface. Windows NT 4.0 does not support the multiple-master option.STEP 7-Micro/WIN also supports a single-master PPI protocol. When using the single-master protocol, STEP 7-Micro/WIN assumes that it is the only master on the network and does not cooperate to share the network with other masters. Single-master protocol should be used when transmitting over modems or over very noisy networks. The single-master mode is selected by clearing the Multiple Master Network check box on the PC/PPI Cable Properties dialog box in the PG/PC Interface.MPI ProtocolBack to Top MPI allows both master-master or master-slave communications.To communicate with an S7-200 CPU, STEP 7-Micro/WIN establishes a master-slave connection. MPI protocol does not communicate with an S7-200 CPU operating as a master. Network devices communicate by means of separate connections (managed by the MPI protocol) between any two devices. Communication between devices is limited to the number of connections supported by the S7-200 CPU or EM 277 modules. See the Table below for the number of connections supported by the S7-200.For MPI protocol, the S7-300 and S7-400 PLCs use the XGET and XPUT instructions to read and write data to the S7-200 CPU. For information about these instructions, refer to your S7-300 or S7-400 programming manualFrom the Setting the PG/PC Interface dialog box, if you are using CP 5511, CP 5611, or MPI along with the PPI protocol, and you click the Properties. button, the properties sheet appears for XXX Card (PPI), where XXX stands for the type of card you installed, for example, MPI-ISA. See Figure 10.Note:Use the MPI protocol when you are communicating to an S7-200 CPU 215, port 1.Follow these steps to set up MPI parameters:1.On the PPI tab, select a number in the Address box. This number indicates where you want STEP 7-Micro/WIN to reside on the programmable controller network.2.Select a value in the Timeout box. This value represents the length of time that you want the communications drivers to spend to attempt to establish connections. The default value should be sufficient.3.Set the transmission rate at which you want STEP 7-Micro/WIN to communicate over the network.4.Select the highest station (node) address. This is the address where STEP 7-Micro/WIN stops looking for other masters on the network.5.Click OK to exit the Set the PG/PC Interface dialog box.Figure 10 MPI-ISA Card (PPI) Properties SheetPROFIBUS ProtocolBack to Top The PROFIBUS protocol is designed for high-speed communications with distributed I/O devices (remote I/O). There are many PROFIBUS devices available from a variety of manufacturers. These devices range from simple input or output modules to motor controllers and PLCs.PROFIBUS networks typically have one master and several slave I/O devices. The master device is configured to know what types of I/O slaves are connected and at what addresses. The master initializes the network and verifies that the slave devices on the network match the configuration. The master continuously writes output data to the slaves and reads input data from them.When a DP master configures a slave device successfully, it then owns that slave device. If there is a second master device on the network, it has very limited access to the slaves owned by the first master.PLC RUN / STOP ModeChange the PLC operating mode by using one of the following methods:Click the RUN button for RUN mode or the STOP button for STOP mode.Select the PLC RUN menu command for RUN mode or select the PLC STOP menu command for STOP mode.Manually change the mode switch located on the PLC.Insert a STOP instruction in your program.Note:To control the RUN/ STOP mode with STEP 7-Micro/WIN software, a communication path must exist between STEP 7-Micro/WIN and the PLC. Also, the PLC hardware mode switch must be set to TERM or RUN. Setting the mode switch to TERM (terminal) does not change the PLC operating mode, but it does allow STEP 7-Micro/WIN to change the PLC operating mode. The status LED on the front of the PLC indicates the current mode of operation. When Program Status or Status Chart operations are underway, there is a RUN / STOP indicator on the status bar near the bottom right edge of the STEP 7-Micro/WIN window.PLC Operating Mode Details:The PLC has two modes of operation: STOP and RUN modes. In STOP mode, you are able to create/ edit your program. Execution of your program is not performed in STOP mode. However, in the RUN mode, your program is executed. In addition, in RUN mode you are able to create, edit, and monitor the operation of the program and data. Debugging aids are provided to enhance the ability to trace the operation of the program and identify programming problems.Debugging aids such as first and multiple scan functions can be used in STOP mode, and result in a STOP to RUN mode change for the prescribed number of scans.Fatal errors are stored by the PLC operating system and force a mode change from RUN to STOP mode. If the PLC has detected a fatal error, a mode change from STOP to RUN is not allowed while the fatal error condition persists. Non-fatal errors are stored by the PLC operating system function and are available for inspection, but they do not cause a mode change from RUN to STOP.In STOP mode, the PLC is in a semi-idle state. Execution of the user program is discontinued; input updates are performed; user interrupt conditions are disabled. The following diagram depicts the timeline that the PLC follows in the STOP mode.In the event that communication interrupts are occurring, the PLC receives the messages and executes the requests as appropriate. While the PLC remains in the STOP mode, I/O value changes are made to the image register. One exception to this is the force function that overrides I/O value changes to the image register. While in STOP mode, you are able to load, upload, or delete the user program memory.In the event that one or more devices are trying to communicate with the PLC through the communication port, the PLC responds to each request in turn. The PLC does not attempt to prevent the actions of one communicator from interfering with the actions of another communicator. All necessary precautions to guard against such interference must be provided by your system design.Self-diagnostic checks include periodic checks of the operating system EEPROM, I/O module status checks and I/O expansion bus integrity check performed on each access to expansion I/O.In RUN mode, the PLC reads inputs, executes your program, writes outputs, responds to communications requests, updates intelligent modules, performs internal housekeeping chores, and responds to your interrupt conditions. Fixed scan times for the RUN mode execution cycle are not supported by the PLC. These actions (except for your interrupts) are serviced according to priority in the order in which they occur. This execution cycle is called the scan cycle and is shown below.Each scan cycle begins by reading the current value of the input bits and writing these values to the input image register. Input bits having no corresponding physical input, but which are in the same byte as bits with physical inputs, are zeroed in the image register on each input update cycle, unless they are forced.After reading the inputs, your program executes starting with the first instruction and proceeding until the end instruction. Upon reaching the end instruction, the PLC checks to see if the intelligent modules of the system need to be serviced. If they do, then the message is read and buffered for the next phase of the cycle.During the message processing phase of the scan cycle, messages that have been received from the communications port are processed. Completed responses are set aside for transfer to the communications requester at the appropriate time.Self-diagnostic checks include periodic checks of the operating system EEPROM and the user program memory as well as I/O module status checks.Finally, the output image register values are written to the output modules. This completes one scan cycle.SIMATIC LAD InstructionsBit Logic Clock Communications Compare Convert Counters Floating-Point Math Integer Math Interrupt Logical Operations Move Program Control Shift/Rotate String Table Timers Call SubroutinesENO UsageENO is a Boolean output for boxes in LAD and FBD. ENO allows you to connect boxes in series (horizontally) rather than in parallel (vertically). If the box has power flow at the EN input and the box executes without error, then the ENO output will pass power flow to the next element. In the event that an error is detected in the execution of the box, then power flow will be terminated at the box that generated the error.ENO has the same status image as EN (EN=ENO), unless the operation does not execute correctly. For example, the DIV_I instruction provides ENO=0 for a divide by zero.In STL there is no ENO output, but the STL instructions that correspond to the LAD and FBD instructions with ENO outputs do set a special ENO bit. This bit is accessible with the STL instruction AENO (AND ENO) and may be used to generate the same effect as the ENO bit of a box.Direct and Indirect AddressingWhen you write your program, you can use either of three modes of addressing instruction operands:Direct Symbolic Indirect Direct AddressingThe S7-200 stores information in different memory locations that have unique addresses. You can explicitly identify the memory address that you want to access. This allows your program to have direct access to the information. Direct addressing specifies the memory area, size, and location;