圖2為"起保停控制"電氣原理圖，在該系統中，按鈕SB0用于停車控制，因此使用其常閉觸點串聯于控制線路。SBl為起動按鈕，使用其常開觸點。若使用相同的設備（即停車SB0用常閉觸點，起動SBl用常開觸點），利用PLC進行該控制，則需編程梯形圖程序 PLC與繼電接觸器控制的重要區別之一就是工作方式不同。繼電接觸器控制系統是按"并行"方式工作的，也就是說是按同時執行的方式工作的，只要形成電流通路，就可能有幾個電器同時動作。而PLC是以"串行"方式工作的，PLC在循環執行程序時，是按照語句的書寫順序自上而下進行邏輯運算，而前面邏輯運算的結果會影響后面語句的邏輯運算結果。因此梯形圖編程時，各語句的位置也會對控制功能產生關鍵影響
詢價聯系人：傅繼宗 （銷售工程師）
詢價熱線：0592-5087951v2●=●=●手機：18030132582
詢價傳真：0592-5165561
詢價QQ：1506179174
●三相微機繼電保護測試儀
●六相微機繼電保護測試儀
●直流高壓發生器
●交直流分壓器
●高壓無線核相儀
●數字語音核相器
●回路電阻測試儀
●接地引下線導通測試儀
●大型地網接地電阻測試儀
●全自動變比組別測試儀
●高壓試驗變壓器
●高低壓開關柜通電試驗臺
●絕緣靴手套耐壓試驗裝置
●CT伏安特性變比極性綜合測試儀
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▲▲▲（我們售出的產品都經過專業的測試和認證，且質保一年，15天內包退換，滿意后付款）
優勢概述：
我們以停產控制系統零部件、為領先優勢、我們有大量庫存和盈余操縱系統零件、停產的控制系
統部分硬件、停產的“DCS系統備品 備件 PLC模塊 備件”整機及配件系列、有著強大的優勢只要您
需要的PLC產品、我們就能幫您找到、公司極具價格優勢。
電氣控制系統：
造紙、印染生產線；泥漿泵、灰漿泵；高壓風機、水泵；行車、焦化翻斗車；電梯；起重機等變頻控制系統。拉絲機、造粒機、切斷機、壓縮機、磨床等變頻控制系統。轉爐傾動及氧槍升降、高爐給料、連鑄、輥道、轉窯、煅燒爐等高可靠變頻控制系統。變電站綜合自動化控制系統
應用領域：
公司經銷產品廣泛應用于數控機械 冶金、石油天然氣、石油化工、化工、造紙印刷、紡織印染、機械、電子制造、汽車制造、煙草、塑膠機械、電力、水利、水處理/環保、市政工程、鍋爐供暖、能源、輸配電等。
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