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MVME172-223A現(xiàn)貨PLC自動(dòng)化卡件

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MVME172-223A現(xiàn)貨PLC自動(dòng)化卡件

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MVME172-223A現(xiàn)貨PLC自動(dòng)化卡件
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MVME172-223A現(xiàn)貨PLC自動(dòng)化卡件 MVME172-223A現(xiàn)貨PLC自動(dòng)化卡件 MVME172-223A現(xiàn)貨PLC自動(dòng)化卡件
MVME172-223A現(xiàn)貨PLC自動(dòng)化卡件
MVME172-223A現(xiàn)貨PLC自動(dòng)化卡件
MVME172-223A現(xiàn)貨PLC自動(dòng)化卡件
根據(jù)觸摸屏設(shè)定的剪切值進(jìn)行對(duì)比，條件滿足輸出Q0.0完成剪切。包裝機(jī)封裝及剪切過程保證不在制袋過程中進(jìn)行，必須加以互鎖。

4結(jié)束語    經(jīng)過長(zhǎng)時(shí)間的調(diào)試和生產(chǎn)實(shí)驗(yàn)，LM3106已在DXD全自動(dòng)包裝機(jī)上得到實(shí)際應(yīng)用。系統(tǒng)在包裝機(jī)上的成功運(yùn)行表明，HOLLiAS-LEC G3系列小型一體化PLC功能完善、性能可靠，是小型PLC的代表，具有先進(jìn)、經(jīng)濟(jì)、實(shí)用、可靠、靈活的顯著特點(diǎn)，不僅提高了系統(tǒng)的安全性和經(jīng)濟(jì)性，而且大大提高了系統(tǒng)的靈活性，為不同客戶的不同需求提供了靈活的解決方案。 參考文獻(xiàn) [1] HOLLiAS-LEC G3小型一體化PLC硬件手冊(cè)，杭州和利時(shí)自動(dòng)化有限公司 [2] HOLLiAS-LEC G3小型一體化PLC軟件手冊(cè)，杭州和利時(shí)自動(dòng)化有限公司 [3] HOLLiAS-LEC G3小型一體化PLC指令與功能塊手冊(cè)，杭州和利時(shí)自動(dòng)化有限公司      隨著我國(guó)經(jīng)濟(jì)的高速發(fā)展和城鎮(zhèn)化程度的不斷提高，工業(yè)污水和生活污水日益增多。為維持經(jīng)濟(jì)的持續(xù)、健康增長(zhǎng)和生態(tài)環(huán)境的良性循環(huán)，必須對(duì)工業(yè)及生活污水加以處理。目前，在我國(guó)主要城市和經(jīng)濟(jì)發(fā)達(dá)地區(qū)的城鎮(zhèn)均已建成了各種規(guī)模的污水處理廠，但大部分經(jīng)濟(jì)欠發(fā)達(dá)地區(qū)的縣市和小城鎮(zhèn)沒有對(duì)各類污水采取處理措施，而是直接排入附近河流。隨著環(huán)保要求的不斷提高，未采取污水處理措施的小城鎮(zhèn)在未來若干年內(nèi)必然會(huì)建立污水處理廠。小城鎮(zhèn)量大面廣，對(duì)污水處理設(shè)施的需求量很大。同時(shí)，受投資額的限制，這些污水處理廠更愿意采用經(jīng)濟(jì)、實(shí)用的產(chǎn)品。本文介紹的監(jiān)控系統(tǒng)在滿足污水處理
設(shè)備安全
、高效運(yùn)行的同時(shí)具有很好的性價(jià)比，具有良好的經(jīng)濟(jì)、社會(huì)效益和推廣前景。 2 原方案分析 在污水處理廠內(nèi)，各種污水處理設(shè)備分布較分散。為監(jiān)視現(xiàn)場(chǎng)設(shè)備的運(yùn)行參數(shù)和運(yùn)行狀態(tài)，需要建立一套中央監(jiān)控系統(tǒng)。該監(jiān)控系統(tǒng)由現(xiàn)場(chǎng)檢測(cè)、數(shù)據(jù)采集和處理、數(shù)據(jù)通訊和中央監(jiān)控等部分組成，現(xiàn)場(chǎng)檢測(cè)儀表檢測(cè)到的設(shè)備參數(shù)和運(yùn)行狀態(tài)經(jīng)過處理后通過計(jì)算機(jī)網(wǎng)絡(luò)上傳至中央控制室，中央控制室內(nèi)的運(yùn)行人員通過監(jiān)控計(jì)算機(jī)監(jiān)視全廠設(shè)備的運(yùn)行狀態(tài)。運(yùn)行人員根據(jù)運(yùn)行參數(shù)和設(shè)備運(yùn)行狀態(tài)發(fā)出各種控制指令，控制指令通過計(jì)算機(jī)網(wǎng)絡(luò)傳到現(xiàn)場(chǎng)，控制設(shè)備的相應(yīng)動(dòng)作。 現(xiàn)場(chǎng)需要對(duì)模擬量和開關(guān)量進(jìn)行監(jiān)控，主要模擬量有流量信號(hào)、液位信號(hào)、壓力信號(hào)、閥門開度信號(hào)等，主要開關(guān)量信號(hào)有刮泥車和吸泥車的啟動(dòng)、停止、運(yùn)行、到位、故障及真空泵的工作狀態(tài)等等。這些現(xiàn)場(chǎng)設(shè)備與中央控制室距離較遠(yuǎn)，目前大多數(shù)監(jiān)控系統(tǒng)由分布式I/O完成檢測(cè)與控制，現(xiàn)場(chǎng)設(shè)備與中央控制室之間的數(shù)據(jù)交換大都采用DP網(wǎng)絡(luò)連接方式，在中央控制室設(shè)置DP主站，現(xiàn)場(chǎng)設(shè)備作為DP從站掛在DP網(wǎng)上。系統(tǒng)結(jié)構(gòu)簡(jiǎn)圖如圖1所示。一個(gè)污水處理廠包括多個(gè)現(xiàn)場(chǎng)設(shè)備，每個(gè)現(xiàn)場(chǎng)設(shè)備作為1個(gè)DP從站連接到DP總線上。采用這樣連結(jié)方式，現(xiàn)場(chǎng)施工工程量很大，需要架設(shè)電纜和橋架，費(fèi)用較高，并且每個(gè)DP從站與DP主站之間采用有線連接，電纜容易損壞，維護(hù)起來比較麻煩。
圖1
圖1
圖1 傳統(tǒng)監(jiān)控系統(tǒng)結(jié)構(gòu)圖
針對(duì)傳統(tǒng)控制系統(tǒng)存在的缺點(diǎn)，我們提出了基于和利時(shí)公司小型一體化
PLC
HOLLiAS-LEC G3的無線解決方案。該方案的系統(tǒng)結(jié)構(gòu)如圖2所示。與傳統(tǒng)通訊方案相比，該方案在現(xiàn)場(chǎng)設(shè)備和中央監(jiān)控室間采用了無線通訊方式，具有傳輸距離長(zhǎng)、可靠性好、抗干擾能力強(qiáng)、節(jié)省電纜、維護(hù)成本低等優(yōu)點(diǎn)。 3 方案設(shè)計(jì) 如圖2所示，該方案采用和利時(shí)公司的小型一體化PLC的CPU模塊LM3107進(jìn)行數(shù)據(jù)采集和傳輸。LM3107本身自帶 RS232通訊接口，通過RS232連接到天線上，天線之間采用Modbus協(xié)議，具備CRC校驗(yàn)，協(xié)議簡(jiǎn)單、可靠性高。通過天線，可以實(shí)現(xiàn)遠(yuǎn)距離Modbus無線通信，從而實(shí)現(xiàn)了每個(gè)污水池（Modbus從站）的數(shù)據(jù)與上位（Modbus主站）之間的數(shù)據(jù)交換。and PAE in turn, mix them fully, and then add hot water above 9O ℃. After mixing, add emulsifier for emulsification. After cooling, add defoamer to make pulp expansion agent. 2.3 the physical and chemical properties of the expanding agent were determined by physical and chemical properties of the extruder, such as solid content, pH value, foaming power and water solubility. See Table 2 for details.



From table 2, we can see that the pH value, foaming power and water solubility of the extruding agent are suitable for making paper for daily use, such as wood pulp, straw pulp, waste paper pulp and bagasse pulp. 2.4 application test of expansion agent (1) optimal dosage of expansion agent




Fig. 2 and Fig. 3 are the change curves of tensile strength of the paper sheet after adding different amounts of expansion agent. Fig. 2 and Fig. 3 respectively show that when the addition amount Q of expansion agent does not exceed 0.3% of absolute dry l wood pulp and 0.4% of absolute dry straw pulp, the tensile strength of the paper is basically unchanged, and the tensile strength decreases with the increase of the addition amount. Fig. 4 and Fig. 5 respectively show that the dry paper mass w of equal volume wood pulp and straw pulp decreases with the increase of the addition amount Q of expansion agent. When the addition q is greater than 0.6%, w decreases and slows down. Combined with factors such as paper quality and production cost, when making household paper with wood pulp as raw material. The appropriate dosage of expansion agent is 0.3% of absolute dry wood pulp; When straw pulp is used as raw material, the dosage of expansion agent is 0.4% of absolute dry straw pulp. The relationship between the amount of expansion agent and the tensile strength and quality of finished dry paper was also investigated. The results show that 0.3% of the absolutely dry pulp is the best amount of expansion agent for making household paper from high-quality waste pulp, while there are too many miscellaneous fibers in bagasse pulp. Generally, the dosage of expansion agent is 0.5%. (2) The use method of expansion agent has been tested many times in paper mills. The application method of expansion agent was established. The main conclusions are as follows: A. add 0.3% ~ 0.5% expansion agent of the absolute dry pulp amount into the pulp forming tank, and directly copy after fully stirring evenly. The mixing time is more than 1h. The longer the mixing time is, the more uniform the mixing is, and the better the expansion degree of the pulp is. B. In