我现在希望I0.0有效，控制步进电机A到B点
I0.1有效，控制步进电机B到c点
I0.2有效，控制步进电机C到A点
用位置控制向导产生了PTO0_CTRL PTO0_RUN PTO0_MAN
三个子程序
在主程序中，我这样编写
LD SM0.0
= L60.0
LDN SM0.0
= L63.7
LD I0.3
= L63.6
LD L60.0
CALL PTO0_CTRL:SBR1, L63.7, L63.6, M2.0, VB500, VD502

LD SM0.0
= L60.0
LD I0.0
EU
= L63.7
LD L60.0
CALL PTO0_RUN:SBR2, L63.7, 0, I0.1, M0.0, VB300, VB304, VB308, VD312

LD SM0.0
= L60.0
LD I0.1
EU
= L63.7
LD L60.0
CALL PTO0_RUN:SBR2, L63.7, 1, I0.2, M0.0, VB500, VB504, VB508, VD512

LD SM0.0
= L60.0
LD I0.2
EU
= L63.7
LD L60.0
CALL PTO0_RUN:SBR2, L63.7, 2, I0.3, M0.0, VB500, VB504, VB508, VD512

LD I0.2
O Q0.2
AN I0.3
= Q0.2

Q0.2控制步进电机方向。
这样为什么Q0.0没有输出呢？