8、
三菱PLC考題一
0,1,2,3,4,5,6,7→0,1,2,3,4,5,6→0,1,2,3,4,5→0,1,2,3,4→0,1,2,3→0,1,2→0,1→0→結(jié)束(速率為每秒1步)8:液體混合控制裝置要求:1.初始狀態(tài)A,B閥門均關(guān)閉,混合閥門C打開10S,將容器放空后關(guān)閉。2.啟動(dòng)操作:按啟動(dòng)按鈕SB1后,裝置按下列規(guī)律運(yùn)作:A.液體閥門A打開,液體A流入容器。當(dāng)液面到達(dá)SQ2時(shí),閥門A關(guān)閉,閥門B打開。B.