PLC控制電梯的設計【三菱】

資源目錄里展示的全都有，所見即所得。下載后全都有,請放心下載。原稿可自行編輯修改=【QQ：401339828 或11970985 有疑問可加】 The latest development trend of PLC long period of time, PLC has always been in the field of industrial automation control of the main battlefield for a wide range of automation control equipment to provide a very reliable control applications. The main reason is that it is able to control the application of automation to provide a safe, reliable and fairly complete solutions for industrial enterprises in the current automation needs. On the other hand, PLC must also rely on other new technology to face diminishing market share of the impact, especially in the industrial impact of PC. PLC is still the need to address the issue of the use of new technologies, system openness and price. PLC technology is still the ultimate trend is one of the bone of contention. Most people think, PLC will continue to lose market share; What is more the view that in the industrial PC before, PLC will be step by step toward death; but there are also some people believe that some special industrial applications for the PLC will continue to provide some market share. Computer control in the global industrial areas, around the opening and re-open process control system, open the process control software, an open data communication protocol, enormous changes have taken place almost everywhere, PLC, but this trend may not continue to develop. With the soft PLC (SoftPLC) control configuration software technology and to further improve the birth and development of installed software and configuration SoftPLC industrial PC-based process control system market share is gradually growth, these facts so that the traditional thinking of PLC suppliers have been dramatic changes have taken place, they must face the reality, in the traditional PLC technology development and improve to make a more open high-profile. The control software, this is the core of PLC Controller, PLC vendors are provided to industrial users of open software programming tool configuration, but also for industrial users was very positive. In addition, open communication network technology has been a breakthrough, and the result is more open to the PLC into the industrial control industry. PLC manufacturers have begun to monitor the industrial PC-based control technology brought about by the impact of the powerful. Some experts even believe that the new business brought about by new technologies and open technical specifications will be buried the traditional PLC. PLC manufacturers believe that, although a large number of industrial-site installation of PLC controlled equipment, but they still need to joint industrial control software company, in order to develop their own PC-based industrial process control software. It is true that a few years ago in the industrial field there is a clear mix of the old and the new PLC, the industrial users have to learn at the same time the old and the new knowledge-related, even learn from each other. The majority of PLC manufacturers for industrial users only provides a logical and a soft platform. In the high-end applications, it is difficult to further distinguish between PLC control system and industrial PC control system for the difference between, which both used the same types of microprocessors and memory chips. Image to make an analogy, if you forget the industrial PC and PLC literal meaning of these terms, then in the box that can be observed that it is precisely the number of basic computer hardware technology, we further observed that the basic technology is the complexity of and a combination of these technologies are effective combinations to the control system. In addition, the reasons for an open control system functions on the one hand, the need for integrated, on the other hand, as well as some industrial users to function caused by too much. If we can give a high degree of importance, will be able to gain more knowledge of basic skills. PLC manufacturers to focus on system functionality, while industrial users will focus on the system. People can see that the future trend is that more features will be further integrated into a control box. Thus, as the order of control and process control events such functional approach will be adopted to deal with other things like motion control, etc. can also be shared to the same system of control structures. It is believed that, PLC technology will continue to open the direction of the transfer of control systems, especially PC-based industrial control systems. In addition to the flexibility of the latter than the traditional PLC with a distinct advantage, also has other advantages, such as to shorten the system to market cycles, lower system investment costs, improve the bottom from the factory to the corporate office automation efficiency of data flow of information and so on. Industrial PC control system on a real-time response has been very good solution, perhaps the main thing is still hidden behind the technology, but the lack of track record. For PLC, the firm is one of its main features, this is already a considerable number of track record to verify. Industrial users will still be very careful to treat PLC, they are on the PLC for testing different technologies. In the use of a new technology, the industrial users need to consider the question is how much risk to take, at the same time need to consider how much business and revenue opportunities. However, industrial users do not fully believe in an open control system benefits. With the further development of technology, they began to play down these ideas. Industrial users to adopt new technologies is balanced by the risks and business activities to their benefit, so the decision-making for the future to provide effective protection. Industrial PC technology offers many features that can enhance the functional properties of the PLC, including the embedded digital video and high-speed floating-point coprocessor. Although Microsoft did not further improve the functional properties of the plan, the new Windows CE 3.0 is fully PLC最新發(fā)展趨勢 長期以來，PLC始終處于工業(yè)自動化控制領域的主戰(zhàn)場，為各種各樣的自動化控制設備提供了非常可靠的控制應用。其主要原因，在于它能夠為自動化控制應用提供安全可靠和比較完善的解決方案，適合于當前工業(yè)企業(yè)對自動化的需要。另一方面，PLC還必須依靠其他新技術來面對市場份額逐漸縮小所帶來的沖擊，尤其是工業(yè)PC所帶來的沖擊。PLC需要解決的問題依然是新技術的采用、系統(tǒng)開放性和價格。 PLC技術發(fā)展的最終趨勢仍然是人們所爭論的焦點之一。大多數人認為，PLC將會繼續(xù)失去市場份額；更有甚者認為，在工業(yè)PC面前，PLC將會一步一步走向死亡；但也有一部分人相信，一些特殊工業(yè)應用領域仍將為PLC提供一定的市場份額。 在全球工業(yè)計算機控制領域，圍繞開放與再開放過程控制系統(tǒng)、開放式過程控制軟件、開放性數據通信協(xié)議，已經發(fā)生巨大變革，幾乎到處都有PLC，但這種趨勢也許不會繼續(xù)發(fā)展下去。隨著軟PLC(SoftPLC)控制組態(tài)軟件技術的誕生與進一步完善和發(fā)展，安裝有SoftPLC組態(tài)軟件和基于工業(yè)PC過程控制系統(tǒng)的市場份額正在逐步得到增長，這些事實使傳統(tǒng)PLC供應商在思想上已經發(fā)生了戲劇性的變化，他們必須面對現實，在傳統(tǒng)PLC的技術發(fā)展與提高方面作出更加開放的高姿態(tài)。對于控制軟件來講，這是PLC控制器的核心，PLC供應商正在向工業(yè)用戶提供開放式的編程組態(tài)工具軟件，而且對于工業(yè)用戶表現得非常積極。此外，開放式通信網絡技術也得到了突破，其結果是將PLC融入更加開放的工業(yè)控制行業(yè)。 PLC制造商已經開始注視基于工業(yè)PC控制技術所帶來的強大沖擊。有專家甚至認為，新商務活動所帶來的新技術和開放技術規(guī)范將會埋葬傳統(tǒng)PLC。PLC制造商認為，雖然在工業(yè)現場安裝有大量的PLC控制設備，但他們仍然需要聯合工控軟件公司，以便開發(fā)他們自己的基于工業(yè)PC的過程控制軟件。 誠然，幾年前在工業(yè)現場明顯存在著新舊PLC混合使用的情況，工業(yè)用戶不得不同時學習相關的新舊知識，甚至彼此借鑒學習。大多數PLC制造商為工業(yè)用戶僅僅提供了軟邏輯和一種操作平臺。 在高端應用方面，很難進一步區(qū)分PLC控制系統(tǒng)和工業(yè)PC控制系統(tǒng)之間的差異，因為這兩者均采用了同樣類型的微處理器和內存芯片。形象地打個比喻，如果你忘掉工業(yè)PC和PLC這些詞語字面上的含義，那么在箱子里所能夠觀察到的恰恰是一些基本計算機硬件技術，我們更多觀察到的卻是那些基本技術的復雜化和混合體，這些技術被有效地組合到控制系統(tǒng)中去。 另外，采用開放控制的原因一方面是系統(tǒng)功能集成的需要，另一方面也是由于一些工業(yè)用戶對功能過分苛求所致。如果能夠給予高度的重視，就能夠獲得更多的基本技術知識。PLC制造商專注于系統(tǒng)功能化，而工業(yè)用戶則專注于系統(tǒng)應用。人們可以看到，將來的發(fā)展趨勢是將更多的功能進一步集成到一個控制箱內。因而像順序控制和過程控制這樣的事件將會采用功能化方式進行處理，其他像運動控制等也能夠共享到相同的控制結構體系中。 可以相信，PLC技術將繼續(xù)向開放式控制系統(tǒng)方向轉移，尤其是基于工業(yè)PC的控制系統(tǒng)。后者除了在靈活性方面比傳統(tǒng)PLC具有截然不同的優(yōu)勢外，還具有其他優(yōu)點，如能夠縮短系統(tǒng)投放到市場的周期，降低系統(tǒng)投資費用，提高從工廠底層到企業(yè)辦公自動化的數據信息流動效率等。 關于工業(yè)PC控制系統(tǒng)的實時響應問題已經得到很好的解決，也許其主要的東西仍然隱藏在技術背后，但缺乏相應的跟蹤記錄。對于PLC來講，堅固性是其主要特點之一，這已經有相當多的跟蹤記錄來驗證。工業(yè)用戶仍然非常小心地對待PLC，他們正在對PLC作不同的技術測試工作。在利用一種新技術時，工業(yè)用戶需要考慮的問題是要冒多大的風險，同時需要考慮對其商務活動能夠帶來多少機會和收益。 但工業(yè)用戶不完全相信開放式控制系統(tǒng)所帶來的好處。隨著技術的進一步發(fā)展，他們開始逐漸淡化這些思想觀念。工業(yè)用戶正在平衡采用新技術所存在的風險和給他們的商務活動所帶來的收益，以便為今后的決策提供有效的保障。