新手！也是刚自学西门子,看了说明自个写的！
Network 1
LD I0.1
O Q0.0
LD Q0.1
ED
OLD
AN C2
AN T37
LPS
AN Q0.1
= Q0.0
LRD
TON T37, 800
LPP
MOVB 2, MB0
Network 2
LD T37
EU
ON T38
AB= MB0, 2
TON T38, 500
Network 3
LD T38
O Q0.1
AN T39
AN Q0.0
= Q0.1
TON T39, 800
MOVB 3, MB0
Network 4
LD Q0.0
EU
LD I0.1
CTU C2, 2