回答你的第一个问题：
网络1
LD SM0.1
CALL USS_INIT:SBR2, 1, 19200, 16#01FE, M0.0, VB0
网络2
LD SM0.0
= L60.0
LD M22.0
AR>= VD50, 1.0
= L63.7
LD I15.7
= L63.6
LD I15.6
= L63.5
LD M22.3
= L63.4
LD M1.7
= L63.3
LD L60.0
CALL USS_CTRL:SBR5, L63.7, L63.6, L63.5, L63.4, L63.3, 1, 1, VD1000, M1.0, VB1, VW700, VD1100, M1.1, M1.2, M1.3, M1.4
网络3
LD SM0.0
= L60.0
LD M22.0
AR>= VD54, 1.0
= L63.7
LD I15.7
= L63.6
LD I15.6
= L63.5
LD M22.3
= L63.4
LD M2.7
= L63.3
LD L60.0
CALL USS_CTRL:SBR5, L63.7, L63.6, L63.5, L63.4, L63.3, 3, 1, VD1004, M2.0, VB2,VW702, VD1104, M2.1, M2.2, M2.3, M2.4
就可以通讯了