Omron CJ - REFERENCE MANUAL 07-2009 Reference Manual page 105

Serial Gateway Overview
Serial-to-Serial-to-Serial Conversion
Without Routing Tables
With Routing Tables
Routing tables to enable the serial communications path to be treated as a
network are optional.
Specify the addresses as shown in the following example.
Address Specification
Address
Remote net-
FINS
work address
command
Remote node
sent
address
Remote unit
address
Serial communications
path (Host Link FINS)
(1) Network address:
To PLC_1 serial port
unit address (e.g., 89
Serial communications
path (Host Link FINS)
(2) Node address: PLC_2
unit numbers for Host Link
(0 to 31) + 1
(3) Unit address: To
PLC_2 serial port unit
address (e.g., 80 hex)
Specify the addresses as shown in the following example.
Address Specification
Address
Remote network
FINS
address
Remote node
command
address
sent
Remote unit
address
Serial communications
path (Host Link FINS) Serial Communications Unit/Board
E.g., Unit number 2, port 1
Serial communications
path (Host Link FINS)
(2) Node address:
PLC_2 unit numbers for
Host Link (0 to 31) + 1
(3) Unit address:
To PLC_2 serial port unit
address (e.g., 80 hex)
Contents Example
PC_1 serial port
89 hex (137 decimal)
Calculated from PC_1 unit
unit address
number 2, port 2
PC_2 unit number for
s+1
Host Link + 1
PC_2 serial port
80 hex (128 decimal)
Calculated from unit number
unit address
0, port 1
Serial Communications Unit/Board
E.g., Unit number 2, port 1
PLC_1
No routing tables required to treat serial
communications path as a network
Serial Communications Unit/Board
E.g., Unit number 0, port 1
PLC_2
No routing tables required to treat serial
communications path as a network
Serial communications path
(CompoWay/F, Modbus)
Target: OMRON Component or Modbus Slave
Contents Example
PC_2 serial communications
A
path network address A
PC_2 unit number for Host s+1
Link + 1
80 hex (128 decimal)
PC_2 serial port unit address
Calculated from unit number
0, port 1
PLC_1
No routing tables required to treat serial
communications path as a network
Serial Communications Unit/Board
E.g., Unit number 0, port 1
Routing tables for treating serial
communications path as a network
PLC_2
Unit number
80 hex (128 decimal)
Calculated from unit number 0, port 1
(1) Network address: To PLC_1 serial
Serial communica-
tions path (Compo-
communications path network address A
Way/F, Modbus)
Target: OMRON Component or Modbus Slave
Section 3-6
Network
address
A
83