基于plc雙電源開關(guān)設(shè)計外文翻譯-plc設(shè)計-wenkub.com
2025-05-07 13:09 本頁面
【正文】 控制電路采用電笛 (或蜂鳴器 )作為報警音響 (同時配以紅色信號燈 ),而恢復(fù)正常時采用電鈴 HA 作為提示音響。在 PLC梯形圖程序中 ,輔助繼電器 R1 作為三相電源 U1 的三相缺相檢測 ,其接通條件為常開輸入 X0,X1 和 X2 的 “與” 邏輯 。 KA1～ KA3 的常開觸點分別作為 U1 的三相缺相檢測的開關(guān)量采樣信號 ,作用于 PLC的輸入端 ,作為編制 PLC的 U1三相缺相檢測邏輯控制程序時的輸入條件 。兩路三相電源的主回路中每一相均有電流表指示濱州學(xué)院?？飘厴I(yè)設(shè)計 (外文翻譯 ) 6 各相電流的狀況 ,以配合控制電路的缺相檢測。 電源 U1 主回路通過交流接觸器 KM1 的主觸點閉合與其負(fù)載 W1 相聯(lián)接 。 本控制系統(tǒng)具有功能完備、 性能可靠、 電路構(gòu)造簡單、制造成本低廉等特點。能自動進(jìn)行缺相檢測、 三相電流顯示 ,某一路供電電源發(fā)生故障時能自動切換到另一路電源繼續(xù)對負(fù)載供電 ,并發(fā)出聲光報警 。 similarly, the threephase power supply U2 A, B phase and C phase lack detection, but also the use of an intermediate relay KA4, KA5 and KA6, respectively connected to power the U2 main circuit A2, B2 phase and C2 phase and zero line N constitute a singlephase circuit, the formation of A2, B2 and C2 threephase openphase detection circuit. KA4 ~ KA6 normally open contacts respectively as U2 threephase openphase detection switch sampling signal, to the PLC input terminal, used in the 濱州學(xué)院?？飘厴I(yè)設(shè)計 (外文翻譯 ) 4 preparation of PLC U2 threephase openphase detection logic control program input conditions. 3 With PLC intelligent dual power control The threephase openphase detection signal sampling circuit, as U1 and U2 threephase openphase detection switch sampling signals of KA1KA3 and KA4KA6, the normally open contacts respectively for the input of the PLC X0X2, X3X5. In the PLC ladder diagram program, auxiliary relay R1 as the threephase power supply of U1 threephase openphase detection, which is normally open input conditions for X0, X1 and X2 and logic。 in the event of a failure and return to normal when respectively sends out two difference obvious alarm and prompt sound effects. It overes the shortings of low double power supply switching control system without phase protection, can automatically reverse switch, as well as fault and return to normal when using a single audio prompts defects. The control system has perfect function, reliable performance, simple circuit structure, low manufacturing cost etc... 2 Intelligent dual power supplies switching main circuit control
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