我最近使用西门子CPU224XP CN 驱动步进马达，遇到一些问题，当我编程刚刚下载程序时，完全一切正常，但是如果PLC断电重起后，步进马达就无法运转，用西门子编程软件监控发现，PLC重新启动后，状态S0.2会自动为ON。步进程序是由PTO向导产生的，我单独调用RUN 程序，不存在PLC重新加电不运转的情况，我把程序贴出来，望高手帮忙参考，谢谢！
LD SM0.1
S S0.0, 1

LSCR S0.0

LD I0.0
A I0.2
A I0.3
SCRT S0.1

SCRE

LSCR S0.1

LD S0.1
S Q0.2, 1

LD I0.1
SCRT S0.2

SCRE

LSCR S0.2

LD S0.2
S Q0.4, 1
R Q0.5, 1

LD S0.2
= L60.0
LD I0.1
= L63.7
LD L60.0
CALL PTO0_RUN, L63.7, 0, I1.0, M1.2, VB940, VB941, VB942, VD944

LD I1.0
SCRT S0.3

SCRE

LSCR S0.3

LD S0.3
R Q0.2, 1

LD I0.2
SCRT S0.4

SCRE

LSCR S0.4

LD S0.4
S Q0.3, 1

LD I0.4
SCRT S0.5

SCRE

LSCR S0.5

LD S0.5
S Q0.2, 1

LD I0.1
SCRT S0.6

SCRE

LSCR S0.6

LD S0.6
S Q0.5, 1
R Q0.2, 1
R Q0.4, 1

LD I0.2
SCRT S0.7

SCRE

LSCR S0.7

LD S0.7
R Q0.3, 1

LD I0.3
SCRT S0.0

SCRE