Omron CJ2 CPU UNIT SOFTWARE User Manual

4-13
4 CPU Unit Initialization
CJ2 CPU Unit Software User’s Manual
4-4 Setting Routing Tables
4
4-4-2 Cases in Which Routing Tables Are Required
Set the routing tables (local network table and relay network table) in the CPU Unit as required by the
application.
Precautions for Correct UsePrecautions for Correct Use
Conditions Required for a Local Network Table
A local network table is required if there is more than one Network Communications Unit con-
nected in the PLC even when relaying is not performed.
The following table shows whether routing tables are required or not according to the network usage
conditions.
*1 Set the remote network address to 0 if a node in the network will be accessed using a Programming Device.
*2 If there is no local network table and access is made with the network address set to 0 using a Programming
Device or an instruction in a ladder program, the network with the Network Communications Unit with the low-
est unit number will be accessed automatically in FINS communications. In this way, the network can be
accessed by setting the lowest unit number for the Network Communications Unit in the network to be
accessed without setting local network tables.
*3 Relay network tables do not need to be set if communications will not be performed across network layers.
4-4-2 Cases in Which Routing Tables Are Required
Network usage
condition
System configuration
Routing tables
Local net-
work table
Relay net-
work table
A Network Communi-
cations Unit is not
connected in the PLC
or only a Network
Communications Unit
classified as a Spe-
cial I/O Unit (e.g.,
CompoNet) is con-
nected.
*1
Not required Not required
More than one Com-
munications Unit clas-
sified as CPU Bus
Units is connected in
the PLC.
Required for
all PLCs in
the net-
works
*2
Required if
communica-
tions will be
performed
across net-
work layers.
*3
CX-Programmer
Only Network Communications Units
classified as Special I/O Units
Local PLC
Message
communications
CompoNet
One network = Local network
Network address = 0
Communi-
cations
instruction
CX-Programmer
It is necessary to specify which of the Network
Communication Units to pass through.
Local PLC
Message
communications
Communi-
cations
instruction
Multiple
networks
Set more
than one
network
address.

Omron CJ2 CPU UNIT SOFTWARE Specifications

General

Brand	Omron
Model	CJ2 CPU UNIT SOFTWARE
Category	Software
Language	English