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求 老師詳細解釋下 梯形圖和數碼表 是怎么只用Y0 Y1 Y2顯示的
下面是數碼表的圖 SCK SAD1 SAD2 分別接Y0 Y1 Y2
[attachment=132791] [attachment=132792] [attachment=132793]  
下面是梯形圖
[attachment=132794] [attachment=132795] [attachment=132796] [attachment=132797] [attachment=132798] [attachment=132799]      

單片機驅動數碼管，plc與單片機通信