Omron SYSMAC 3G8F7-CLK13-E Operation Manual page 25

Overview
Note
Message Service
Twisted-pair Cable or Optical Fiber Cable Connection
Communications between Different PCs
The following models must be used to create a wired network that contains
more than 32 nodes: 3G8F7-CLK23-E, 3G8F7-CLK21-EV1, CS1W-CLK23,
CS1W-CLK21-V1, CJ1W-CLK23, and CJ1W-CLK21-V1.
Data links can be automatic set, or they can be set by the user to freely
change the sizes of the data areas used. A data link can also receive only part
of the data sent from another node. This function enables users to receive
only the required data, thereby increasing data link efficiency.
The message service can send and receive up to 2,012 bytes of data (includ-
ing the FINS header), allowing high volumes of data to be sent and received
without having to split it up.
The Controller Link Units can be connected to the network using either
shielded twisted-pair cables, optical fiber cables, or optical ring optical fiber
cables. The optical ring optical fiber cables can be either H-PCF cables or GI
cables. Select the system that suits the application.
Features of Twisted-pair Cable
Twisted-pair cable is easy to connect and maintain. The cable can be pro-
cessed much more easily than coaxial or optical cable, thereby reducing the
cost of tools and assembly time.
Connections are made to a terminal block on the Controller Link Unit and to a
special connector on the computer board for easy system assembly and mod-
ification.
The network is equipped with the required terminating resistance built into the
Units allowing the terminating resistance to be easily set at both ends of the
network using a simple switch.
Features of Optical and Optical Ring Systems
Optical fiber cable (H-PCF cable or GI cable) has superior noise resistance,
so the system can provide highly reliable communications even in very noisy
conditions.
With H-PCF cable, the total communications distance can be up to 20 km
(1 km max. between nodes using adhesive polishing). With GI cable, the com-
munications distance can be up to 30 km (2 km max. between nodes using
62.5/125 μm cable), which allows long-distance and large-scale networks.
Once the optical fiber cable has been fitted with special connectors, the
cables can be easily connected or disconnected.
The following Controller Link Units are available for communications between
different PCs. Wired Units and Optical Units, however, cannot be used
together in the same Controller Link Network. (Optical and Optical Ring Units
can exist in one Controller Link Network using H-PCF cables, but with GI
cables, on an Optical Ring Unit is available.)
Wired System
• Controller Link Unit for CS-series Programmable Controllers
• Controller Link Unit for CJ-series Programmable Controllers
• Controller Link Units for C200HX/HG/HE Programmable Controllers
• Controller Link Units for CV-series Programmable Controllers
• ISA Bus Controller Link Support Board for IBM PC/AT or compatibles
Section 1-1
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