System Configuration Patterns; Features Of Componet Networks - Omron CJ Series Operation Manual

1 Introduction
1-1-4

System Configuration Patterns

Repeater Units connected
with multidrop connections
Master
Unit
Repeater
Unit
Sub-trunk Sub-trunk
line line
Slave Units
Slave Units
Slave Units connected
connected with
with multidrop
T-branch
connections
connections
1-1-5

Features of CompoNet Networks

Programless Communications
With the use of only Round Cable I (2-conductor), Round Cable II (4-conductor), Flat Cable I
(unsheathed), and Flat Cable II (sheathed) cables, cyclic data exchange (remote I/O communica-
tions) can be achieved between a Master Unit mounted in a Controller and multiple Slave Units.
High-speed Multi-point Processing
Remote I/O communications for up to 2,560 I/O points can be achieved at approximately 1,000
points per millisecond (at 4 Mbps
replace systems previously configured with Basic I/O Units.
*1 There are restrictions when you branch lines or use Flat Cable II. For details, refer to 1-2-2 Branch Line and
Multidrop Support for Cable Types and Baud Rates.
Easy Introduction
Remote I/O communications can be started merely by connecting the Master Unit and Slave Units
with communications cables, setting the switches on the Master Unit, and turning ON the power to
the Slave Units and the Controller.
Repeater Units for Greater Flexibility
Repeater Units can be used in a network to enable the following network expansions.
• Extending the cable length
• Increasing the number of nodes
• Branching from the trunk line
• Changing the type of cable
Repeater Units can be used to extend up to two segment layers (called sub-trunk lines) from the
trunk line. Up to 64 Repeater Units can be connected per Master Unit and up to 32 Repeater Units
can be connected to the trunk line.
Note Communications power is supplied to a sub-trunk line from the Repeater Unit.
1-6
Slave Units connected
Repeater Units connected
with T-branch and then
with T-branch connections
multidrop connections
Trunk line
Repeater
Unit
Branch line Branch line
Branch line
Repeater Repeater
Unit Unit
Branch line
Sub-trunk
Sub-trunk
line
line
Slave Units
Slave Units
Slave Units
Slave Units connected
connected with
with T-branch
multidrop
connections
connections
*1
). This enables configuring CompoNet Network systems to
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)
Slave Units connected Slave Units
with T-branch and connected with
then T-branch multidrop connections
connections
Slave
Branch line
Unit
Branch line
Sub-branch line
Sub-trunk
line
Slave Units
Slave Units
Slave Units
Sub-trunk
Repeater Unit
line
connected to
create second
segment layer
: Slave Unit
: T-branch
: Multidrop
Terminating
Resistor
: Terminating Resistor
Repeater Unit
Branch line
Branch line
Repeater Unit
Slave Units