不好意思，SPB是国际写法，SIMATIC不支持，改用JC，N是具体数值，你也不知道换个数，LAR1是连写，这下OK了吧，你还真够懒的。
L P#0.0 // set initial address
T MD 0
M1: L MD 0
LAR1 // or +AR1
A I [AR1,P#0.0]
= Q [AR1,P#0.0]
L MD 0
L 1
+D
T MD 0
L MB 4
INC 1
L MB 4
L 10 //N is the number of the bit You want to control
<=I
JC M1 //SPB is the international writeing, JC is for SIMATIC