plc毕业设计说明书外文文献翻译

plc毕业设计说明书外文文献翻译内容摘要：

, in turn, to deal with the interruption of work (the interruption of services operating procedures). Pending End interruption, and return to the original operational procedures. Which control needs to be addressed, which went for the interruption? Which has no treatment, will not be ignored. Clearly, the interruption of ways and scanning mode is different. Interruption in the form of puter to be utilized to the full, urgent tasks are to be dealt with in a timely manner. However, if at the same time to deal with several tasks that must be done? Priority will also be much easier to highlevel, low? Care less than it might appear. Therefore, the interruption of work is not suited to the daily use of the site. However, PLC scanning method is used mainly in cases of exclusion or suspension. Namely, a large number of controls by scanning all manner of dealing with individual needs, allowing the interruption of scanning operation procedures, turn to deal with it. This can be done taking into account all the control。 the individual can carry out emergency treatment. Actually the process of PLC is more plex than we mentioned here, the analysis of its basic tes, some theoretical issues. If the personnel on the above can enter a change, physical realization information processing, I/O call Cumming space, time scanning method supplemented by the interruption, as a way to study and understand it, and good understanding of PLC is how to achieve control and good grasp of the basic principles of PLC points. For more indepth, in the further course of study, will make a specific presentation. 5 Programmable Controller Basic Characteristics The operating principles are those from the discussion of PLC, PLC’s input and output are mutually separated in physics, which is linked to its existing storage operation on the procedures to achieve. It into a relevant, and not rely on physics, not a line。 But by the information process, using soft logic links. Its work is based on the use of good information. Information is material and energy with its own laws. Facilitate the processing of information, facilitate munication and facilitate storage。 Information may also be trusted, and so on. It is precisely because of these characteristics of information, decisions of the basic characteristics of the PLC. The examples of PLC’s four characteristics are as follow: Functional Rich PLC functions are very rich. This was mainly related to the processing of information rich store of information systems and internal directives devices. Scores up its mand。 several hundred may be a logic problem for all types of data processing also. Where ordinary puter can do, it can be done. Its internal devices that exist in the data storage area is a wide range of capacity ambitious. I/O relays can be used to store input, a point of information, fewer scores, and more up to thousands and tens of thousands or even ten thousands. This means that it can carry out so many I/O points into and out of information used for such largescale control. Its internal various relays, representing intermediate relays, the number more. A place can exist as an intermediate relays, how much! Its counter, timer and many are relay circuits are far behind. Minor modifications or modules, and its internal timer, and can reach 100 meters, thousands. This is because as long as the word that will be used exists, and some signs spaces bee timer, counter, so it is that much. Furthermore, these internal device must be installed into electricity maintained, or not maintained we call that the call for the replacement of the. Use to meet different requirements. These pieces are also relays difficult to achieve. Its data can be used to store large data storage area, hundreds, thousands and tens of information can be kept, and not after the loss of electricity. PLC is rich external equipment may establish friendly puter interface for the exchange of information. Could into procedures into data readable by the procedures read? And reading and writing in the book, the screen. Data read out, it can dumps can print. Data entry into can to the card reading, and so on. PLC has munications interfaces with the puter link or working, exchange of information and puters. Networking can do it itself to form a single aircraft that cannot have greater, broader geographical control system. PLC also includes powerful functions could be carried out since the diagnosis. The results can be automatically recorded. This increased transparency for its maintenance, facilitated. Rich functions for the PLC to provide a wide range of applications possible。 At the same time, also for industrial automation systems, and control much of the intelligent move created conditions. Collection rich in functions such as PLC who is notcall controls。 More traditional relay control circuits are inparable. Userfriendly PLC control system used to achieve it is very convenient. This is because: first PLC control logic established procedures, the procedures used to replace hardware wiring. Series of procedures than wiring change procedures than changes wiring of course easier! Secondly PLC hardware is highly integrated, has integrated modules for various miniaturization. Furthermore, these modules are plementary, have achieved mass production and standardization. Various control systems for modular PLC manufacturers have more cash supply, the market can be bought. Therefore, the hardware system configuration and construction are also very convenient. For this reason, using programmable controller is the word may. For software stresses that its procedures may be also be incorporated. Stresses on hardware, its configuration variable, but also easy to change. Specifically, the PLC gains five convenient points:。