SBS / Bit3 406-202 VME SBUS TO A32/D32 VMEBUS WITH DMA CONTROLLER
2.8駕駛室六面體密封駕駛室的前、后窗和兩側(cè)門玻璃均帶有雨刷，后窗為活動拉窗。可選裝無氟冷暖空調(diào)或排氣加熱供暖系統(tǒng)，以及新鮮空氣交換系統(tǒng)，國內(nèi)推土機(jī)獨采用的活性碳纖維過濾除臭裝置。模擬量控制的速度鏈20紀(jì)70年代，用于造紙機(jī)分部傳動的可控硅傳動裝置及后來的KGSA系列分部傳動紙機(jī)用整流設(shè)備，其中的速度鏈控制器均由兩運算放大器組成如）。而實際上，在造紙廠，總車速電位器！。及所有分部微調(diào)電位器！……！"均在造紙機(jī)操作側(cè)的操作臺上，而速度鏈控制器及可控硅調(diào)速裝置又在造紙機(jī)傳動側(cè)的控制室內(nèi)。這樣，長距離的電位器引線，即使使用屏蔽線也難免受干擾，而且，電位器本身的阻值也容易受環(huán)境溫度影響而發(fā)生變化。另外，電位器動觸點的氧化接觸問題及運算放大器FC52的溫漂“、‘時漂”等問題，都將造成給定電壓的漂移，而使車速不穩(wěn)，發(fā)生斷紙現(xiàn)象。這種由電位器調(diào)節(jié)給定，由運算放大器組成的速度鏈根本無法勝任高速、薄頁及纖維強(qiáng)度較差的非木材漿料分部傳動造紙機(jī)。
3用PLC實現(xiàn)數(shù)字速度鏈隨著微電子技術(shù)的不斷發(fā)展，全數(shù)字直流調(diào)速器、交流變頻器及可編程控制器PLC也在不斷的得到應(yīng)用和普及。目前，不少造紙機(jī)制造廠商及不少造紙廠都在利用這些進(jìn)的電氣產(chǎn)品紙機(jī)的電氣傳動進(jìn)行更新設(shè)計或改造。
PLC的配置根據(jù)造紙機(jī)分部傳動的分部數(shù)及控制點可靈活配置，現(xiàn)采用的PLC為OMRON公司的C200HG-CPU43，將原操作臺上的總車速及各分部微調(diào)電位器改為用升、降速按鈕矸關(guān)量信號）控制，并接入控制房內(nèi)的PLC輸入模塊C200H-ID22，然后經(jīng)CPU按各分部速度的比例運算，后由D/A數(shù)模轉(zhuǎn)換模塊C200H-DA003C200H-DA002）完成運算結(jié)果的輸出，作為各分部傳動點的速度給定。
廈門興銳達(dá)自動化設(shè)備有限公司
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EMAIL:2859249356@qq.comSVG 99-80302-0?1 90S Interlock Board
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