Explanation - Omron SYSMAC CS1W-SCB41-V1 Operation Manual

Conditions Requiring Routing Tables
Serial-to-Serial-to-Serial Conversion
Without Routing Tables
With Routing Tables
6-7-4

Explanation

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 hex)
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)
To treat the serial communications path as a network, the serial port itself is
recognized as a Communications Unit and is allocated a network address.
Serial Communications Unit/Board
Serial port
Unit address U
(See note.)
Serial communica-
tions path
Assigned to network address n
Contents
Example
PLC_1 serial port
89 hex (137 decimal)
Calculated from PLC_1 unit
unit address
number 2, port 2
PLC_2 unit number for
s+1
Host Link + 1
PLC_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
PLC_2 serial communications
A
path network address A
PLC_2 unit number for Host s+1
Link + 1
80 hex (128 decimal)
PLC_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
Commu-
nications
Local network table in routing tables
Unit
Unit number
Ex-
(See note.)
pressed
U
as:
Note: The unit number is set as a
Network
CPU Bus Unit for Communica-
tions Units, but the unit ad-
dress (80 hex/81 hex + unit
number × 4 hex, as a decimal)
is set for the serial port.
Section 6-7
Network
address
A
Network
address
n
Set correspondence
235