Duplex Ethernet Units - Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual

CS1D Duplex System Overview and Features
Identical unit numbers and node addresses
C C D
C
P
L L P
K U L
K
System with duplex communications
C C C
L L
P
K K U
System with duplex communications
Identical unit numbers and node addresses

Duplex Ethernet Units

Using Primary/Secondary
Lines
Primary Network
Secondary Network
Duplex CPU, Dual I/O Expansion System (Duplex CPU System Only)
Identical unit numbers and node addresses
C P P
C
P
S S L
U
U U K
P P
S S
U U
Using duplex Ethernet Units and redundant communications lines increases
the reliability of the network. The communications lines use a primary line and
a secondary line, to which Ethernet Units are connected. Normally the pri-
mary communications line is used, but operation will switch to the secondary
communications line automatically if an error occurs in the primary communi-
cations line or the primary Ethernet Unit, thereby allowing continuous commu-
nications.
• Duplex Ethernet Units do not require duplex programming considerations.
The CPU Unit select the Unit to use as the send destination.
• Ethernet Units use 100Base-TX and support high-speed communica-
tions.
Duplex lines
including hubs
Primary Secondary
Unit Unit
Duplex Units
Note Duplex operation of Ethernet Units for a Duplex CPU System requires a CS1D
CPU Unit Ver. 1.1 or later and CX-Programmer Ver. 4.0 or higher. Duplex
operation of Ethernet Units for a Single CPU System is possible for any CS1D
CPU Unit for Single CPU Systems, but CX-Programmer Ver. 4.0 or higher is
required.
A more reliable system can be configured by expanding the Duplex CPU Sys-
tem.
P P
C C D C
L P P P S S
K U L U U U
System with duplex communications
Fiber-optic cable
(ring connection)
C C
P
L P
S
K U
U
System without duplex communications
100Base-TX
100Base-TX
Section 1-1
CLK: Controller Link Unit
CPU: CPU Unit
DPL: Duplex Unit
PSU: Power Supply Unit
Non-duplex device
5