模擬量輸出板 3BSE008522R1
模擬量輸出板 3BSE008522R1
程序設(shè)計是PLC應(yīng)用中zui關(guān)鍵的問題。PLC程序設(shè)計的基本思路是按照設(shè)備的要求設(shè)計輸入和輸出信號的邏輯關(guān)系，在輸入某些信號時得到預(yù)期的輸出信號，從而實現(xiàn)預(yù)期的工作過程。因此，簡單而常用的方法是以過程為目標，分析每個過程的啟動條件和限制條件，根據(jù)這些條件編寫該過程的PLC程序，完成了所有過程的PLC程序即完成了整個PLC程序。
PLC程序設(shè)計的常用方法有以下三種：
程序設(shè)計的方法有很多，如狀態(tài)表法、 、流程圖法及現(xiàn)代Petri網(wǎng)法 等。
① 狀態(tài)表法是從傳統(tǒng)繼電器邏輯設(shè)計方法繼承而來，經(jīng)過適當(dāng)改進，適合于可編程控制器梯形圖設(shè)計的一種方法。但狀態(tài)表法僅適合于單一順序問題的程序設(shè)計，對于具有并行順序和選擇順序的問題就顯得無能為力了。
②功能圖法是先將控制要求表達為功能圖，用功能圖來說明可編程控制器所要完成的控制功能，然后由功能圖寫出邏輯方程，再畫出梯形圖或?qū)懗鲋噶睢?/span>
③流程圖法是熟悉計算機高級語言的程序設(shè)計人員常用的程序設(shè)計方法。
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IFM EFECTOR PROXIMITY SENSOR IC0006 ICE2040-FB0A/NP?T 101838
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TOYOKEIKI 0-400 AMMETER JIS C 1102
PHOTOCRAFT PTRH-F LIGHTSOURCE SENSOR, NNB
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IME 100 OHM PLATINUM RESISTANCE TEMPERATURE DETECTOR 1080WE(ENCL)
PRECISION 208-277V 1800W OUTDOOR PHOTOELECTRIC CONTROL T-168
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EFECTOR PROXIMITY SENSOR IF5793 IP67
IFM EFFECTOR ELECTRIC PRESSURE SENSOR PN7024
PEPPERL + FUCHS PROXIMTY SENSOR NJ15-30GK50-WS
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BANNER PHOTOELECTRIC SENSOR AND EMITTER CABLE LR200
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ADVANTAGE SENTRA "HE" SERIES TEMPERATURE CONTROLLER SK-1675-41C1
