Omron CS1W-SLK11-21 - 06-2004, Руководство пользователя

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SYSMAC LINK Unit Features Section 1-2
1-2 SYSMAC LINK Unit Features
CS-series SYSMAC LINK Units are equipped with a variety of special features
including some developed from those incorporated by the C-series SYSMAC
LINK Unit. These features allow PLCs in a SYSMAC LINK Network to commu-
nicate with or automatically exchange data with other PLCs in the same Net-
work and to communicate with interconnected Networks.
High Speed, Reliability,
and Flexibility The specialized communications LSIs used in all SYSMAC LINK Units deliver
high speed, reliability, and flexibility in an advanced data link system, while
optical fiber cable systems provide high-speed communications with unparal-
leled immunity to noise.
In the event of an error or failure in the polling node, another node automati-
cally takes over management of the SYSMAC LINK System without stopping
the entire network. The CX-Net within the CX-Programmer can monitor and/or
program PLCs anywhere in the network via the SYSMAC LINK System.
Distributed Control with
Data Links The data link function transfers data to and from other nodes automatically,
establishing simple but powerful peer-to-peer links between nodes. Data links
can be generated automatically or the user can use the flexibility of manually
generating data links to eliminate unused link words, improve data link I/O
response time, and to even create several data link groups in one network.
The data link communications cycle time can be fixed at a constant value, so
even simultaneous remote programming/monitoring and NETWORK READ/
WRITE instructions (RECV(98)/SEND(90)) execution have no effect on the
data link I/O response time.
The data link function allows data exchange not only between PLCs but also
between PLCs and host computers in the network, making it possible to
develop communications software with ease.
Active Communications Communications can also be programmed using ladder-diagram instructions
(SEND(90), RECV(98), and CMND(490)) to facilitate communications with
other PLCs and host computers on an as-needed basis. Use of these instruc-
tions enables the following:
1,2,3... 1. Broadcast transmissions
2. Response monitoring time setting (response time-out setting)
3. Transmit retry setting
4. Enabling/disabling responses
Internetwork
Communications Routing tables can be set up in network PLCs so that communications are
possible with interconnecting networks or networks one network away from
the local network. This includes both bridging to other SYSMAC LINK Net-
works or passing gateways to other OMRON networks, including those in
SYSMAC NET Link Systems or SYSMAC BUS/2 Remote I/O Systems.
Remote Access The CX-Net within the CX-Programmer can access PLCs on the local net-
work, on adjacent networks, or on networks one removed from the local net-
work, including Controller Link and Ethernet Networks. Access can be used to
monitor operation and/or manipulate data and programs.
RAS Functions SYSMAC LINK Units are equipped with three RAS functions (RAS is an acro-
nym for reliability, availability, and serviceability). The Polling Node Backup
and Failed Node Bypass (optical systems only) functions prevent the network
from failing when one Unit fails. The Internode Echo Test function aids in com-
munications troubleshooting.
Remote monitoring of the network’s operating status and error logs also aids
in troubleshooting and quick correction of communications problems.