A16B-2203-0880,A16B-2203-0880,A16B-2203-0880
三菱FX系列PLC專用編程軟件FxGP/WIN進行控制系統開發的一般步驟
1系統設計
根據確定所要開發的系統控制方式及其它特殊要求，根據所在單位和個人條件，計算I0點數和選擇PC機的規格型號，并設計繪制電路原理圖和安裝接線圖。
2設計PLC梯形圖程序
采用PLC作為中間過程控制的電梯電氣控制，在電路原理圖和安裝接線圖設計繪制完成后，還必須設計繪制與電路原理圖對應的PLC梯形圖程序，梯形圖程序是PLC內各種軟硬繼電器的邏輯控制圖，它的邏輯控制方式類似于中間過程控制繼電器之間的邏輯控制電路圖，因此它是PLC控制電氣系統設計工作的重要環節之一。設計梯形圖程序時，應接PLC使用手冊的方法，了解PLC的工I0接口分配、組合排列和代號，機內各種軟繼電器、數據區、通道代號，常用指令的編制規則和代號等。
設計梯形圖一般應遵守以下規則:
(1) I/0點和內部各種軟繼電器等的常開和常閉觸點可多次重復使用。
(2)軟繼電器的線圈不能與左邊的母線直接連接，應有過渡點。
(3)軟繼電器的右邊不能再有接點。
(4)在一套梯形圖中，相同代號的線圈不能重復出現。(用SET, RST指令外)
(5) PLC的輸入輸出點可當軟繼電器來使用。
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