RMS-TSG-TZ
RMS-TSG-TZ
觸摸屏PLC變頻器通訊控制 為適應(yīng)紡機(jī)市場的發(fā)展，我公司開發(fā)了F1528型高速細(xì)紗機(jī)，該機(jī)具有高速、齒輪箱油浴潤滑、觸摸屏操作顯示、PLC自動(dòng)控制、變頻調(diào)速等特點(diǎn)。與傳統(tǒng)細(xì)紗機(jī)相比：速度更快，控制精度更高，適應(yīng)紡紗品種更廣，操作方便簡單，有操作提示、故障診斷功能，紡紗過程自動(dòng)控制，可定長及定時(shí)落紗。 系統(tǒng)原理 PLC讀取觸摸屏中設(shè)定的數(shù)據(jù)并加以運(yùn)算，采集輸人端的各種信號，通過對變頻器、接觸器進(jìn)行控制驅(qū)動(dòng)各電動(dòng)機(jī)運(yùn)轉(zhuǎn)，使全車按程序自動(dòng)協(xié)調(diào)運(yùn)行，同時(shí)把需要顯示的數(shù)據(jù)或故障信息通過觸摸屏顯示出來。PLC對變頻器采用通訊控制，定時(shí)比較檢測錠速和設(shè)定錠速：當(dāng)偏差過大時(shí)（≥3％），全機(jī)自動(dòng)停車，觸摸屏顯示報(bào)警信息“請檢查皮帶輪配比、電動(dòng)機(jī)型號或變頻器”；當(dāng)偏差較大時(shí)（<3％且≥05％），對變頻器輸出頻率自動(dòng)作適當(dāng)修正，實(shí)現(xiàn)一種簡易的速度閉環(huán)控制。 系統(tǒng)硬件構(gòu)成 電氣系統(tǒng)采用的主要元器件有：PLC、觸摸屏變頻器、傳感器、電動(dòng)機(jī)及低壓電器元件（結(jié)構(gòu)框圖如圖1所示）。 傳感器、指令開關(guān)信號輸入部分 該部分由主軸、前后羅拉傳感器、成形桃輪位置傳感器、鋼領(lǐng)板行程傳感器和指令開關(guān)組成，主軸前后羅拉傳感器用來測速，由PLC計(jì)算出相應(yīng)的錠速、紡紗長度、產(chǎn)量、牽伸倍數(shù)、捻度、細(xì)紗號數(shù)等；成形桃輪位置傳感器使停車時(shí)能按一定順序和位置停車，有利于下一次開車，減少開車斷頭，實(shí)現(xiàn)紗線自動(dòng)留頭；鋼領(lǐng)板行程傳感器用來確定鋼領(lǐng)板在開車、滿紗、落紗時(shí)的位置；指令開關(guān)用來發(fā)送開車、中途停車等指令。
PLC構(gòu)建的除濕機(jī)分布式集群控制系統(tǒng)，日前在歐洲某鋰電池生產(chǎn)廠家中成功應(yīng)用。 除濕機(jī)是控制空氣中溫濕度的一種設(shè)備，控制溫度精度要求0.5度，控制濕度要求在1%RH以下。歐洲某鋰電池生產(chǎn)廠家一共有除濕機(jī)30臺，有房間50間。該分布式集群控制系統(tǒng)一共用科威帶CANBUS的混合型PLCP51臺。PLC輸入輸出配比如下：8路開關(guān)量輸入，8路開關(guān)量輸出，4路模擬量輸入，4路模擬量輸出。房間溫濕度采集選用科威16路模擬量輸入PLC。以上兩款PLC都自帶RS232、RS485、CANBUS三個(gè)通信口。RS232通信口兼容三菱FX-2N的協(xié)議；RS485高速的主從協(xié)議，通信距離1KM。CANBUS是高速的現(xiàn)場總線，通信速度達(dá)260K，通信距離5KM。51臺PLC分布在樓上樓下二層，組成一個(gè)CANBUS網(wǎng)絡(luò)，各房間PLC都為CAN從站，在中控室內(nèi)有一臺PLC為CAN主站，CAN主站將數(shù)據(jù)送到中控室計(jì)算機(jī)中?，F(xiàn)場用觸摸屏控制，中控室用計(jì)算機(jī)控制并記錄相關(guān)信息。
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