发布于 2007-08-22 19:40:51
0楼
//Start启动,常开点、Stop停止,也采用常开点。
Motor:=(Start OR Motor) AND NOT Stop;
或者:
IF Start AND NOT Stop THEN
Motor:=TRUE;
END_IF;
IF Stop THEN
Motor:=FALSE;
END_IF;
或者:
IF Stop THEN
Motor:=FALSE;
ELSIF Start THEN
Motor:=TRUE;
END_IF;
I can do it