Omron SYSMAC 3G8F7-CLK12-E Operation Manual page 22

Overview
Flexible Inter-network Connections
Improved Error Handling (RAS Functions)
Error Log and Data Link
Status Display
Polling Node Backup
Node Bypass Function
Optical transmission path
CLK
PC
Transmission Path
Duplication
Disconnect Detection
and Notification
Node Connection
Configuration Data
Reading
6
The Controller Link Network can be connected to another network (Ethernet,
SYSMAC NET Link, SYSMAC LINK, or another Controller Link network)
through a CS1-series or CV-series PC. By installing Ethernet, SYSMAC NET
Link, or SYSMAC LINK, or Controller Link Communications Units on the same
CS1-series PC or CV-series PC, a message service can be created with nodes
in the interconnected networks through that PC. Up to three network levels are
possible.
An error log enables quick handling of errors by recording the time the error oc-
curred and error details. The current Controller Link Unit and Support Board sta-
tus are also available, as are the data link and network status.
When an error occurs in the polling node that controls the Controller Link Net-
work, another node automatically becomes the polling node. This prevents an
error at a single node from influencing other nodes on the network, achieving a
highly reliable system.
In an Optical or Optical Ring Controller Link Network, data communications can
be continued by bypassing the node, even when a node in the communications
line malfunctions or the PC or computer power supply is turned OFF. This pre-
vents the whole network system from being affected by a node malfunction or
power interruption.
To use the bypass node function, backup power must be supplied to the Control-
ler Link Unit/Support Board.
Bypass
CLK
PC
24-VDC
Backup Pow-
er Supply
In Token Ring Mode in an Optical Ring System (H-PCF cable or GI cable), data
transmission will be unaffected even by a cable or connector break at one loca-
tion in the ring connection. With the optical cable wired in a ring shape, a break at
one point will simply cause the transmission to be routed on the other path.
Even with transmission path duplication, the network will be broken if disconnec-
tions occur in two or more places. In Token Ring Mode in an Optical Ring System
(H-PCF cable or GI cable), the location of a disconnection can be detected and
identified by means of the node status information given for all nodes. This func-
tion can be used to prevent system crashes in advance, e.g., by performing
maintenance when a disconnection occurs at one location.
In Token Ring Mode in an Optical Ring System (H-PCF cable or GI cable), con-
nection data can be read for all of the nodes in the network. The information that
can be read includes the order in which the nodes are connected and which of
two optical connectors is connected to which node. Special support software
(Controller Link Support Software, Ver. 2.00 or later) is required to read the node
connection configuration data.
CLK CLK
PC
Power interruption
IBM PC/AT or
compatible
Section 1-1