If B003 is enabled, the I1 status of master will transferred
to the F1(Modbus address is 0x1536) slave3
(IP:192.168.0.103).
If B004 is enabled, the master will read the AI1 value
(Modbus address 4x1024) of slave1 and save into local
AF1.
If B005 is enabled, the master will read the AI1 value
(Modbus address 4x1024) of slave2 and save into local
AF2.