Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 265

Conditions Requiring Routing Tables
Reasons for Routing Tables
236
The CX-Net in the CX-Programmer is used to set the relationship between the
serial port's unit address and the allocated network address in the local net-
work tables of the routing tables. These settings are then transferred to the
CPU Unit to which the Serial Communications Unit/Board is mounted.
CX-Net in CX-
Programmer
Serial Communications Unit/Board
Serial communications path
Unit address U (80 hex/81 hex
+ unit number × 4 hex)
• Serial Port 1 Unit Addresses
Unit number 0 1 2
Hexadecimal 80 84 88
Decimal 128 132 136 140 144 148 152 156 160 164 168 172 176 180 184 188
• Serial Port 2 Unit Addresses
Unit number 0 1 2
Hexadecimal 81 85 89
Decimal 129 133 137 141 145 149 153 157 161 165 169 173 177 181 185 189
These settings enable the serial communications path to be treated as a sin-
gle FINS network. Further, the network address allocated to the serial port
can be specified in the destination network address part of the FINS mes-
sage. This enables messages to passed on to serial ports in a system com-
prised of multiple networks connected to a single PLC (including the serial
communications path).
FINS message
Serial Communications Unit/Board
Routing
enabled
Specify on which path
to send the message.
CompoWay/F, Modbus-RTU, Modbus-ASCII Protocol Conversion
Routing tables are not required to enable serial communications paths to be
treated as networks. (The serial port can be specified in the node without
using routing tables by specifying the node to which the Board/Unit is con-
nected, and specifying the unit address as that of the serial port.)
Local network table in routing tables
Unit number
U
PLC
Local
network
table
Network address n
3 4 5 6 7 8
8C 90 94 98 9C A0
3 4 5 6 7 8
8D 91 95 99 9D A1
CPU Unit
Local
network
table
Serial communications path
Section 6-7
Network
address
n
Set the unit address
U as a decimal for
the unit number.
9 A B C D E
A4 A8 AC B0 B4 B8
9 A B C D E
A5 A9 AD B1 B5 B9
F
BC
F
BD