例1 XO T246 Y1 ￥1 8 ANI X2 9 OUT X1 Y1 X2 Y3 2 ANI T46 10D X2 r1}H○ 3 OUT Y1 110 M10 4 OUT Y2 12AIT246 5 LD X1 13 OUT 1246 6 OR Y3 M10 14 OUT T246 7 AND Y1 15 M10 T246 图7-8a)梯形图b)语句表例1