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MVME2305-900邏輯模擬量順序模塊

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MVME2305-900邏輯模擬量順序模塊

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MVME2305-900邏輯模擬量順序模塊 MVME2305-900邏輯模擬量順序模塊 MVME2305-900邏輯模擬量順序模塊
MVME2305-900邏輯模擬量順序模塊
PROFIBUS是全球應用廣泛的過程現(xiàn)場總線系統(tǒng)。 PROFIBUS有三種類型:FMS、DP和PA。PROFIBUS-FMS可用于通用自動化;PROFIBUS-DP用于制造業(yè)自動化;PROFIBUS-PA用于過程自動化。使用PROFIBUS過程現(xiàn)場總線技術可以使硬件、工程設計、安裝調(diào)試和維修費用節(jié)省40%以上。PROFIBUS-DP的技術性能使它可以應用于工業(yè)自動化的一切領域，包括冶金、化工、環(huán)保、輕工、制藥等領域。除了安裝簡單外，它有極高的傳輸速率，可達12Mbits/s，通訊距離可達到1000米，如果加入中繼器可以將通訊距離延長到數(shù)十公里，具有多種網(wǎng)絡拓撲結構(總線型、星型、環(huán)型)可供選擇。在一個網(wǎng)段上多可連接Profibus-DP從站即ET200S或是ET200eco 32個。我國是世界上大的紡織國家、擁有10萬多家紡織、服裝企業(yè)。變頻器在紡織機械領域中有著巨大的應用空間。紡織機械種類繁多，有紡紗機械、織造機械、針織機械、化纖機械、染整機械等等，一般小功率、低頻變頻器普遍應用在開清棉機，梳棉機，條卷機，精梳機，并條機以用粗紗機，細紗機和洛簡機等，對于織造機械則有漿紗機，整經(jīng)機等。而變頻器在各類機械中的作用且不盡相同，而具有高效、節(jié)能、環(huán)保的紡織機械是我國從紡織大國邁向紡織強國所必須擁有的技術?，F(xiàn)以A186E型梳理機為例，主要工序是開清棉聯(lián)合機,后道工序是并條機,主要用于加工棉纖維和化學纖維。將前道工序送來的棉（化纖）卷或由棉箱供給的棉（化纖）層進行開松分梳除雜。使所有呈卷曲、塊狀的棉團成為基本伸直的單纖維狀態(tài)，并在此過程中，除掉清花工序遺留下來的破籽、雜質(zhì)和短絨，然后集束成一定規(guī)格的棉條，儲存于條筒內(nèi)，供并條工序使用。因為是老機器，在技術方面存在一定的缺陷，電磁離合器由于故障較高，不時出火警，給生產(chǎn)效率和產(chǎn)品質(zhì)量造成一定的損失，現(xiàn)為了使道夫升、降速平滑，在機械傳動中設計雙速
電機
，采用交流變速調(diào)速，從而實現(xiàn)道夫升速斜率的任意調(diào)節(jié)，道夫工藝轉(zhuǎn)速的任意可變功能。這項技術的內(nèi)容包含了先進的信息處理和控制技術，即以計算機為核心，有
PLC
、工控機、單片機、
人機界面
、現(xiàn)場總線等組成的控制系統(tǒng)；先進的驅(qū)動技術，有變頻調(diào)速、交流伺服、步進電機等。 1、改造方案 　　 根據(jù)梳理機運行實踐及當前控制領域的水平與發(fā)展，確定A186E型梳理機改造的指導思想是：機電分離，集中控制，實時監(jiān)控。其目的在于將電氣控制系統(tǒng)與機械系統(tǒng)結構上相分離，以利于機電系統(tǒng)的維護和修理，將分離式硬件邏輯控制系統(tǒng)改為模塊化集中控制，以提高梳理機控制水平，增強系統(tǒng)的可靠性；運用智能化技術對梳理機運行進行實時監(jiān)控，給操作工以指導。A186E電氣改造的關鍵是去掉錫林電機、道夫電機的原有繼電器控制系統(tǒng)，采用PLC控制變頻器方案。新型控制系統(tǒng)以松下FP0 PLC為控制核心，以兩臺JBA系列變頻器為主要控制單元，控制梳棉機錫林和道夫的運轉(zhuǎn)。 使用了PLC和JBA系列變頻器的A186E型梳理機控制系統(tǒng)，實現(xiàn)機電一體化，完成相對復雜的控制。并可節(jié)約能耗、實現(xiàn)無級調(diào)速、延長機器使用壽命、改善生產(chǎn)工藝，提高產(chǎn)品質(zhì)量，降低生產(chǎn)成本。 　　 2、變頻器控制系統(tǒng) 　　 變頻系統(tǒng)采用JBA系列交流變頻器，電機運行時主要有三種速度，分別為：手動速度，低速及標準速度。手動速度用于試車，低速是啟動過渡時的電機運行速度，標準速度是電機正常運行速度，通過改變相應參數(shù)值，就可以改變電機的運行速度。 　　 改造前后生產(chǎn)指標 　　 改造后梳棉機工作穩(wěn)定可靠，而且能按梳棉機的工藝要求方便地控制梳棉機?？梢愿鶕?jù)所紡纖維種類和對產(chǎn)品質(zhì)量要求確定梳棉機的電氣參數(shù)，包括錫林和道夫的啟動時間以及它們的轉(zhuǎn)速等。通過紡不同纖維的試驗并綜合測試發(fā)現(xiàn)，梳棉機的平均產(chǎn)量可達21kg/h，提高了近35%。斷頭率下降40%，減少回花30%，針布軋傷率平均下降50%，生條一級合格率提高10.5%，生條重量不勻率下降0.8%-2.4%，并可促進安全生產(chǎn)，降低勞動強度。 基于GT01觸摸屏的PLC控制變頻器的控制系統(tǒng)方案在A186E梳理機上的應用，提高了單機的機電一體化水平，更為重要的是為提高棉紡全流程運行的穩(wěn)定性、可靠性奠定了基礎，保證了全流程連續(xù)、同步、平穩(wěn)運行，使輸出毛條長片段、起長片段、甚至短片段的均勻度都能穩(wěn)定在一定范圍內(nèi)，從而保證了成紗質(zhì)量的穩(wěn)定性。該機所采用的控制系統(tǒng)，完全可以應用于其它國產(chǎn)傳統(tǒng)紡織設備的改造當中。改造后的梳棉機生產(chǎn)穩(wěn)定，整體性能大有提高。改造費用不足6000元，卻可較大幅度提高A186型梳棉機的技術性能，延長使用壽命，對我國現(xiàn)有5萬多臺A186系列梳棉機的技術改造具有一定的推廣價值。PROFIBUS is the most widely used process field bus system in the world. There are three types of PROFIBUS: FMS, DP and PA. PROFIBUS-FMS can be used for general automation; PROFIBUS-DP is used for manufacturing automation; PROFIBUS-PA is used for process automation. Using PROFIBUS process field bus technology can save more than 40% of the cost of hardware, engineering design, installation, debugging and maintenance. The technical performance of PROFIBUS-DP makes it applicable to all fields of industrial automation, including metallurgy, chemical industry, environmental protection, light industry, pharmacy, etc. In addition to simple installation, it has a very high transmission rate, up to 12Mbits/s, and a communication distance of 1000m. If a repeater is added, the communication distance can be extended to tens of kilometers. It has a variety of network topologies (bus, star, ring) to choose from. A maximum of 32 Profibus DP slave stations, namely ET200S or ET200eco, can be connected on a network segment. China is the largest textile country in the world, with more than 100000 textile and clothing enterprises. Frequency converter has a huge application space in the field of textile machinery. There are many kinds of textile machinery, including spinning machinery, weaving machinery, knitting machinery, chemical fiber machinery, dyeing and finishing machinery, etc. In general, small power and low-frequency frequency converters are widely used in opening and cleaning machines, carding machines, winders, combers, drawing frames to use roving machines, spinning machines and Luo Jian machines. For weaving machinery, there are sizing machines, warping machines, etc. The role of frequency converter in all kinds of machinery is not the same, and the textile machinery with high efficiency, energy conservation and environmental protection is a necessary technology for China to move from a textile power to a textile power. Take the A186E carding machine as an example. The main process is the opening and cleaning machine, and the next process is the drawing frame, which is mainly used for processing cotton fibers and chemical fibers. The cotton (chemical fiber) roll sent from the previous process or the cotton (chemical fiber) layer supplied by the cotton box shall be opened and combed for impurity removal. Make all curly and blocky cotton wads into a basically straight single fiber state, and in this process, remove the broken seeds, impurities and short fibers left by the clearing process, and then bundle them into cotton slivers of a certain specification, and store them in the sliver barrel for use in the drawing process. Because it is an old machine, there are some technical defects. Due to the high failure of the electromagnetic clutch, it gives fire alarms from time to time, causing certain losses to the production efficiency and product quality. Now, in order to make the doffer speed rise and fall smoothly, we design a double speed in the mechanical transmission
electric machinery
AC variable speed regulation is adopted, so as to realize the arbitrary adjustment of doffer speed rise slope and the arbitrary variable function of doffer process speed. The content of this technology includes advanced information processing and control technology, that is, with the computer as the core
PLC
Industrial personal computer, single chip microcomputer
interface
Control system composed of field bus; Advanced driving technology, including variable frequency speed regulation, AC servo, stepping motor, etc. 1. According to the operation practice of the carding machine and the current level and development of the control field, the transformation plan determines that the guiding ideology of the A186E carding machine transformation is: electromechanical separation, centralized control, and real-time monitoring. Its purpose is to separate the electrical control system from the mechanical system in structure to facilitate the maintenance and repair of the electromechanical system. The separate hardware logic control system is changed to modular centralized control to improve the control level of the carding machine and enhance the reliability of the system; Intelligent technology is used to monitor the operation of the carding machine in real time to guide the operators. The key of A186E electrical transformation is to remove the original relay control system of cylinder motor and doffer motor, and adopt the PLC control frequency converter scheme. The new control system takes Panasonic FP0 PLC as the control core and two JBA series frequency converters as the main control unit to control the operation of the cylinder and the doffer of the carding machine. A186E carding machine control system using PLC and JBA series frequency converter realizes electromechanical integration and relatively complex control. It can also save energy consumption, realize stepless speed regulation, prolong the service life of the machine, improve the production process, improve product quality and reduce production costs. 2. The frequency conversion system of frequency converter control system adopts JBA series AC frequency converter. There are three main speeds when the motor operates, namely: manual speed, low speed and standard speed. The manual speed is used for test run. Low speed is the running speed of the motor during startup transition. The standard speed is the normal running speed of the motor. The running speed of the motor can be changed by changing the corresponding parameter values. The carding machine can work stably and reliably after the production index transformation before and after the transformation, and the carding machine can be conveniently controlled according to the technological requirements of the carding machine. The electrical parameters of the carding machine can be determined according to the type of fiber spun and the requirements for product quality, including the starting time of the cylinder and the doffer and their rotating speed. Through the test of spinning different fibers and comprehensive test, it is found that the average output of the carding machine can reach 21kg/h, which is increased by nearly 35%. The rate of broken ends decreases by 40%, and the return of flowers decreases by 30%. The rate of crimping of card clothing decreases by 50% on average. The first grade qualification rate of green slivers increases by 10.5%. The weight unevenness of green slivers decreases by 0.8% - 2.4%. It can also promote safe production and reduce labor intensity. The application of the control system scheme of PLC control inverter based on GT01 touch screen on A186E carding machine has improved the electromechanical integration level of a single machine. More importantly, it has laid a foundation for improving the stability and reliability of the whole process of cotton spinning, guaranteed the continuous, simultaneous and stable operation of the whole process, and made the evenness of long sliver, long sliver and even short sliver output stable within a certain range, Thus the stability of yarn quality is guaranteed. The control system adopted by the machine can be completely applied to the transformation of other domestic traditional textile equipment. The production of the reformed carding machine is stable and the overall performance is greatly improved. The transformation cost is less than 6000 yuan, but it can greatly improve the technical performance of A186 carding machine and prolong its service life. It has certain promotion value for the technical transformation of more than 50000 A186 carding machines in China.