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TRICONEX 4000042-125自動(dòng)化PLC工控卡件庫(kù)存

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TRICONEX 4000042-125自動(dòng)化PLC工控卡件庫(kù)存

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TRICONEX 4000042-125自動(dòng)化PLC工控卡件庫(kù)存 TRICONEX 4000042-125自動(dòng)化PLC工控卡件庫(kù)存 TRICONEX 4000042-125自動(dòng)化PLC工控卡件庫(kù)存
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TRICONEX 4000042-125自動(dòng)化PLC工控卡件庫(kù)存 TRICONEX 4000042-125自動(dòng)化PLC工控卡件庫(kù)存

TRICONEX 4000042-125自動(dòng)化PLC工控卡件庫(kù)存
還大大提高皮帶管煙草工業(yè)生產(chǎn)中,煙絲的配比工藝段無(wú)疑是非常關(guān)鍵的工藝環(huán)節(jié)之一。所謂煙絲配比,是指按生產(chǎn)中葉絲的流量為基數(shù),將梗絲、膨脹煙絲、薄片煙絲以及殘絲中的幾種按各自的設(shè)定比例和葉絲進(jìn)行實(shí)時(shí)均勻的摻配。配比型電子皮帶秤是完成此項(xiàng)工藝段加工過(guò)程的核心設(shè)備,而影響其精度的關(guān)鍵因素之一就是稱重信號(hào)的采集精度及穩(wěn)定性,它將直接關(guān)系到煙絲配比的質(zhì)量,從而也在很大程度上決定著后續(xù)煙支成品的內(nèi)在吸味質(zhì)量的穩(wěn)定性和均衡性。雖然電子皮帶秤的技術(shù)已經(jīng)相對(duì)比較成熟,但對(duì)于應(yīng)用設(shè)計(jì)者而言,技術(shù)進(jìn)步的探索之路永無(wú)止境。
二   配比型電子皮帶秤的工作原理電子皮帶秤按其工作用途分類,一般分為計(jì)量型、控制型、配比型三種類型。計(jì)量型—計(jì)量物料的瞬時(shí)流量及累計(jì)重量。控制型—均衡地控制物料重量,使物料按設(shè)定流量通過(guò)。配比型 —實(shí)現(xiàn)葉絲、梗絲、薄片絲、殘絲等的設(shè)定配比。      配比型電子皮帶秤稱重系統(tǒng)由多臺(tái)稱量裝置組成并集中控制,集稱量、配比于一體,具有交互式多任務(wù)、多參數(shù)計(jì)量功能,能夠?qū)νㄟ^(guò)該配比系統(tǒng)的多種煙絲進(jìn)行動(dòng)態(tài)累計(jì)稱量、流量控制,并按一定比例進(jìn)行摻配。2.1 電子皮帶秤工作原理      各種煙絲通過(guò)限量管(或直接下落)到稱量裝置的皮帶上,隨皮帶向前運(yùn)轉(zhuǎn),當(dāng)其通過(guò)稱量裝置有效稱量段時(shí),其重量通過(guò)輸送機(jī)皮帶和計(jì)量托輥加到荷重傳感器上,傳感器感受負(fù)荷產(chǎn)生的信號(hào)直接送入稱重模塊SIWAREX U中,經(jīng)稱重模塊SIWAREX U采集并轉(zhuǎn)換的數(shù)據(jù)直接經(jīng)S7系統(tǒng)總線送入PLC數(shù)據(jù)采集系統(tǒng),檢測(cè)稱量段上的單位長(zhǎng)度重量q(kg/m),同時(shí)測(cè)速裝置檢測(cè)出皮帶運(yùn)行速度v(m/s),經(jīng)過(guò)PLC運(yùn)算得出瞬時(shí)流量和累積量并進(jìn)行顯示。瞬時(shí)流量為:Q=3600×q×v(kg/h)累積量為:G=∫q×v×d t(kg)其中:q=w×h×p sw  — 秤體上物料寬度(m),與限量管寬度有關(guān)。   h   — 秤體上物料厚度(m),與限量管開(kāi)口高度有關(guān)。   p s  — 物料比重(kg/m3)   v  — 帶速(m/s)2.2  電子皮帶秤配比工作原理       配比型電子皮帶秤控制系統(tǒng)以通過(guò)主稱量裝置的物料瞬時(shí)流量為基準(zhǔn),與摻配稱量裝置相對(duì)應(yīng)的設(shè)定摻配比例運(yùn)算后,作為該摻配裝置的設(shè)定流量,同時(shí)將測(cè)得的通過(guò)該摻配裝置的瞬時(shí)流量與設(shè)定流量信號(hào)進(jìn)行比較,利用PLC進(jìn)行PID控制運(yùn)算,輸出調(diào)速信號(hào)調(diào)節(jié)電機(jī)的轉(zhuǎn)速,從而改變皮帶速度,以達(dá)到自動(dòng)調(diào)整摻配流量的目的。2.3  電子皮帶秤控制系統(tǒng)組成配比型電子皮帶秤主控柜部件采用德國(guó)西門(mén)子公司 S7-300系列PLC,其電控系統(tǒng)功能框圖見(jiàn)圖1。

圖1  電控系統(tǒng)功能框圖       S7-300 PLC由CPU317-2PN/DP、高速計(jì)數(shù)模塊FM350-2、稱重模塊SIWAREX U、數(shù)字量輸入輸出模塊和電源模塊組成。CPU317-2PN/DP主要用于主過(guò)程控制及Profinet通訊。包含數(shù)字量輸入點(diǎn)和數(shù)字量輸出點(diǎn)、模擬量輸入和模擬量輸出回路,其中數(shù)字輸入點(diǎn)和數(shù)字輸出點(diǎn)承擔(dān)著整個(gè)電子皮帶秤的數(shù)字量輸入和輸出控制以及提供與外部聯(lián)機(jī)時(shí)所需的輸入和輸出信號(hào);模擬量輸入用于4-20mA流量外設(shè)定采樣;模擬量輸出用于變頻器控制及瞬時(shí)流量4-20mA輸出。 through the network. The advantages of ControlLogix System include modular and high-performance control platform suitable for sequence, process, transmission and motion control, unrestricted mixing of multiple processors, networks and I / O, general programming environment and Logix control engine, connection to NetLinx open network structure, and a wide variety of I / O modules [1]. 2. The structure of the remote control system after the transformation, according to the characteristics of the two sets of control systems of the ballast water lifting pump house and the pump house in the East auxiliary construction area, after full demonstration, it is decided to use the ControlNet network to establish the control network communication between the ballast water lifting pump house control system and the pump house control system in the East auxiliary construction area, and realize the remote control of the ballast water lifting pump house through the preparation of software program. ControlNet network is a highly stable, highly determined and secure I / O network for key applications. It is an open and technologically advanced control network to meet the requirements of real-time and high-throughput applications. ControlNet network adopts the general industrial protocol CIP (original control and Information Protocol), which is widely proved in the field of industrial communication. It integrates the network functions of I / O control and peer-to-peer communication, and provides high-speed and high-performance network communication for these two network functions. The feature of ControlNet network is that it opens the fieldbus IEC61158 and European standard en50170 to completely