你先下个modbus库，在进行制作
网络1
LD SM0.0
= L60.0
LD SM0.0
= L63.7
LD L60.0
CALL MBUS_CTRL:SBR2, L63.7, 38400, 0, 1000, M10.0, MB16
网络2
LDN T99
TON T99, 25
网络3
LDW>= T99, 10
LDW= C0, 2
CTU C0, 3
网络4
LDW= C0, 0
= L60.0
LDW= C0, 0
EU
= L63.7
LD L60.0
CALL MBUS_MSG:SBR3, L63.7, 1, 0, 40001, 8, &VB100, M10.1, MB14
网络5
LDW= C0, 1
= L60.0
LDW= C0, 1
EU
= L63.7
LD L60.0
CALL MBUS_MSG:SBR3, L63.7, 2, 0, 40001, 8, &VB200, M10.2, MB12
可以参考下