Schneider Electric Modicon BM85 - Manual (Page 32)

Device Addressing and Message Routing 890 USE 103 00 22
2.3 Routing Examples
Figure 8 illustrates message routing across two networks.
MODBUS PLUS NETWORK (UP TO 64 NODES)
CPU B CPU A
BM85
BRIDGE
MULTIPLEXER
1 2 3 4
BP85
BRIDGE
PLUS
MODBUS PLUS NETWORK (UP TO 64 NODES)
CPU C
BM85
BRIDGE
MULTIPLEXER
1 2 3 4
SA85
NETWORK
ADAPTER
BRIDGE
MODE
MASTER
SLAVE
50
100
150
200
A
B
C
MASTER
SLAVE
A
B
MASTER
HOT STANDBY
CONFIGURATION
PRIMARY STANDBY
5 8 40
4 30 2
25
24
TASKS: 1
2
M
M
M
M
M
M
= MODEM
NETWORK
SLAVE
NETWORK
SLAVE
NETWORK
SLAVE
NETWORK
SLAVE
(NOTE 1)
NOTES:
1. STANDBY UNIT ASSUMES PRIMARY ADDRESS PLUS 32.
M
Figure 8 Routing Examples