IS200EXHSG4A GE 模塊plc卡件
IS200EXHSG4A GE 模塊plc卡件
IS200EXHSG4A GE 模塊plc卡件
梯形圖是PLC控制系統(tǒng)中使用得最多的圖形編程語言,被稱為PLC的{dy}編程語言。梯形圖與電器控制系統(tǒng)的電路圖很相似,具有直觀易懂的優(yōu)點,很容易被工廠電氣人員掌握,特別適用于開關量邏輯控制。梯形圖常被稱為電路或程序,梯形圖的設計稱為編程。PLC梯形圖設計規(guī)則(或規(guī)范)如下:
(1)觸點應畫在水平線上,不能畫在垂直分支上。應根據(jù)自左至右、自上而下的原則和對輸出線圈的幾種可能控制路徑來畫。
(2)不包含觸點的分支應放在垂直方向,不可放在水平位置,以便于識別觸點的組合和對輸出線圈的控制路徑。
(3)在有幾個串聯(lián)回路相并聯(lián)時,應將觸頭多的那個串聯(lián)回路放在梯形圖的最上面。在有幾個并聯(lián)回路相串聯(lián)時,應將觸點最多的并聯(lián)回路放在梯形圖的最左面。這種安排,所編制的程序簡潔明了,語句較少。
(3)不能將觸點畫在線圈的右邊,只能在觸點的右邊接線圈。
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