【免费下载】PLC中英文资料外文翻译

1、可编程控制器技术讨论与未来发展学生姓名： *所在院系： *所学专业： *导师姓名： *完成时间： *外文资料PLC technique discussion and future developmentWith the development of the times, todays technology is maturing, competitionintensified; rely on manual operation does not satisfy the current industry outlook,there is no guarantee of higher qualit

2、y requirements and high-tech corporate image.People saw in the production practice, automation to bring great convenience andproduct quality assurance, but also reduce the labor intensity, reducing the staff on theestablishment in many complex production process is difficult to achieve targetcontrol

3、, the overall optimization, optimal decision-making, skilled operatives,technicians or specialists, managers can easily determine and operate it, you can getsatisfactory results. artificial intelligence research is the use of computers to achievethe target, the analog These intelligent behavior, thr

4、ough coordination of the humanbrain and a computer to combine human models for solving very complex problem offinding the best way.PLCs most important feature is: electrical engineer electrical hardware no longerspend too much scheming, as long as the button switch or sensor input connected tothe PL

5、C input point will solve the problem by connecting the output point contacts orrelay to control the power of the boot device, and small power output devices can beconnected directly.Contained within the PLC having a central processor of the CPU, and with anexternal I / O port expansion I / O interfa

6、ce and the memory addresses of three majorcomponents, CPU core is formed by one or more accumulators, which have thelogical math capabilities, and can read the contents of the program memory to drivethrough the calculation of the corresponding memory and I / O interface; I / O port tothe internal ac

7、cumulator and external input and output systems together, and therelevant data stored in the program memory or data memory; memory can be I / Oport input data stored in memory and transferred to the accumulator at work, and I / Ointerfaces, memory sub-ROM program memory and data memory RAM, ROM data

8、can be permanently stored in memory, CPU and RAM only as a temporary calculatedusing the calculation buffer space.PLC immunity is extremely good, we do not have to care about the life and workof its harsh occasions, all of these issues are no longer the subject of our failure, andleft us is concerne

9、d with how to take advantage of the PLCs internal resources to0strengthen our ability to control the device, so that our equipment is more flexible.PLC language is not what we imagine the assembly language or C languageprogramming, instead of using the existing relay control of the ladder, making an

10、electrical engineer in the preparation of the program is very easy to understand thelanguage of the PLC, and many non- Electrical professionals and in-depthunderstanding of the PLC quickly.PLC communication has become increasingly reflect its value, in thecommunication between the PLC and the PLC, t

11、hrough information, communicationand data sharing to ensure coordination between devices, has reached acomplementary effect.PLC data transfer only the internal data to the other side of a consecutiveaddresses, we called it a table, the other PLC by reading data in the table to operate.The transmissi

12、on of information has serial and parallel port lines of the points:the usual PLC is 8 machine, of course, there are 16 machines. When we send the datatransmission can be a one to the other, you can also eight 8-bit send data to each other,one and eight difference is what we call the serial port and

13、parallel port to send data tosend data. Serial port speed is relatively slow, but as long as two or three port lineswill solve the problem, and can use the phone line for remote control. The parallelport transmission speed is very fast, which is 256 times the serial port, a short distanceadvantage,

14、because it is TTL level, generally limited to one meter range, it does notapply to long-distance data transmission, so the cost is too expensive.Many cases, we always like to use string and conversion chip for transmission, inwhich case we do not need to be overly complex register set, and direct da

15、ta transferinstruction through the exchange of data, but not a very viable communicationapproach, because the transmit data when the PLC must have been waiting for theother side of your data output, it can not do other work.When you are reading a book, when you hear someone knocking at the door, you

16、stop the hands of things, play to open the door, and knock on the door with a dialogue,this time the phone rings, you answer the phone schematically in take calls, back toknock on the door to continue with the dialogue, has been completed, you thencontinue to read your book, in which case we call it

17、 an interrupt, it has authority, alsohas priority, PLC have this kind of functionality. It is characterized by the operationof the device is that we may encounter during emergency incidents, we have to stopimmediately the task at hand, to deal with more important things, this situation is that1we of

18、ten encounter, PLC to perform tasks in an emergency, always first save thecurrent state, such as the programs address, CPU accumulator data, like when wewent to open the door to note we are looking at the first few pages of the book orsimply to make a sign, because we will have to continue to be fol

19、lowed to see theback of the book.CPU always in accordance with the wishes we should do, but yougive it a wrong thing, it will do the same, which we must pay attention.Interrupt is not the only one, sometimes exist several interrupt, the interruptpriority level with them according to the persons requ

20、est to perform higher-levelinterrupts. This will form the interrupt interrupt interrupt nesting. Of course, thelevel of disruption inside the PLC CPU based on a variety of resource-related, butalso with the capacity of the stack size are also related.When we finished work a workpiece, a signal to th

21、e PLC, the PLCs internalcounter is incremented by one to calculate the workload of our day, a simple counterto solve the problem, of course, they can also be kept in case of power failure data ,prompting the data is not lost, it is our desire.PLC also has advanced features counter, when we accept so

22、me of the high-speeddata, high speed mentioned here is in the microsecond-level data, such as bar codescanners constantly scan data, high-speed signal processor (DSP) calculated and so on,we will adopt to advanced counters to help us count. It is in the PLC program isexecuted once found senior count

23、er corresponding interrupt, it will immediately puthis work. After re-programming of the ladder program that we advanced in theimplementation of the program counter will automatically perform the correspondingtask, which will rise to a high level of senior counter a level.PLC development has grown f

24、rom a single model into the era of communicationnetworks and network with other industrial control panels and I / O card board easilybe shared.Configuration software can connect all of these hardware through a moreintuitive animated pictures to be controlled and can be controlled via the Internet in

25、different places, such as the launch of Shenzhou V is using this approach to make thespaceship launch.Higher level of development we need to continue efforts to obtain. PLC has beenaround for a full impact on the generations, we have the experience from the previousgeneration to get more knowledge a

26、nd lessons learned, to continue the developmentof PLC technology, to bring it to a higher tide.2中文资料可编程控制器技术讨论与未来发展随着时代的发展,当今的技术也日趋完善、竞争愈演愈烈;单靠人工的操作已不能满足于目前的制造业前景,也无法保证更高质量的要求和高新技术企业的形象.人们在生产实践中看到,自动化给人们带来了极大的便利和产品质量上的保证,同时也减轻了人员的劳动强度,减少了人员上的编制.在许多复杂的生产过程中难以实现的目标控制、整体优化、最佳决策等,熟练的操作工、技术人员或专家、管理者却能够容易

27、判断和操作,可以获得满意的效果.人工智能的研究目标正是利用计算机来实现、模拟这些智能行为,通过人脑与计算机协调工作,以人机结合的模式,为解决十分复杂的问题寻找最佳的途径PLC 的最大特点在于：电气工程师已不再电气的硬件上花费太多的心计，只要将按钮开关或感应器的输入点连接到 PLC 的输入点上就能解决问题，通过输出点连接接触器或继电器来控制大功率的启动设备，而小功率的输出设备直接连接就可以。PLC 的内部包含了具有中央处理器的 CPU，并带有外部 I/O 口扩展的 I/O接口地址和存储器三大块组成，CPU 的核心是由一个或者多个累加器组成，它们具有逻辑的数学运算能力，并能读取程序存储器的内容通过

28、计算后去驱动相应的存储器和 I/O 接口；I/O 口将内部累加器和外部的输入和输出系统连接起来，并将相关的数据存入程序存储器或者数据存储器中；存储器可以将 I/O 口输入的数据存入存储器中，并在工作时调转到累加器和 I/O 接口上，存储器分程序存储器 ROM 和数据存储器 RAM,ROM 可以将数据永久的存入存储器中，而RAM 只能作为 CPU 计算时临时计算使用的缓冲空间。PLC 的抗干扰是极其优秀的，我们根本不用去关心它的使用寿命和工作场合的恶劣，这些所有的问题已不再成为我们失败的主题，而留给我们的是关心如何来利用 PLC 的内部资源为我们加强设备的控制能力，使我们的设备更加的柔性。PLC

29、 的语言并不是我们所想象的汇编语言或 C 语言来进行编程，而是采用原有的继电器控制的梯形图，使得电气工程师在编写程序时很容易就理解了PLC 的语言，而且很多的非电气专业人士也对 PLC 很快认识并深入。PLC 的通信已经愈来愈体现它的价值，在 PLC 与 PLC 之间的通信，能够通过信息的沟通和数据的共享来保证设备之间的相互协调，已达到互补的效果。PLC 的数据传送只是将内部的数据传送到对方的一块连续的地址中，我们3把它称为一个表，对方的 PLC 通过读取表中的数据来进行操作。信息的传送口线有串口和并口之分：通常的 PLC 是 8 位机，当然也有 16位机。我们在发送数据的时候可以是一位一位的发送给对方，也可以 8 位 8 位的将数据发送到对方，一位和 8 位区别也就是我们所说的串口发送数据和并口发送数据。串口速度比较慢，但只要两条或者三条口线就能解决问题，并能借用电话线来进行远程控制。而并口的传送速度是极快的，它是串口的 256 倍，在短距离占有优势，由于是 TTL 电平，一般限于 1 米的范围，它并不适用于长距离的数据传送，这样成本太昂贵了。很多的情况下我们总喜欢采用串并转换芯片来进行传输，这种情况下不需要我们进行过于复杂的寄存器设置了，而直接通过数据传送指令进行数据交流，但在通信中并不是一个十分可行的办法，因为在发送数据的时候对方的 PLC 必