Omron SYSMAC CS1W-CLK13 Operation Manual page 56

Application Precautions
• When an Optical Ring System is used, the same transmission path format
settings must be made for all of the nodes. The network cannot be set up
correctly if these settings are different.
• When Optical Bus (CLK11) and Optical Ring (H-PCF cable) (CLK12,
CLK12-V1, or CLK13) Controller Link Units are used in combination,
observe the following precautions.
• The transmission path format for all of the Optical Ring Controller Link
Units must be set to token-bus mode. The network cannot be set up
correctly if the mode settings are different.
• All of the node addresses must be within the range of 1 to 32.
• The software switch at the Optical Ring Controller Link Units for select-
ing either polling node or normal node must be set for normal node. If
the Optical Ring Controller Link Unit nodes are set for polling when the
network is started up, then the maximum node address in the network
parameters will be set to 62, and a network parameter error (ERH in-
dicator lit) will be generated at the Optical Bus Controller Link Unit
nodes. If this occurs, use the Controller Link Support Software (Ver.
2.00 or later) to set the maximum node address to 32.
• The Optical Ring (GI cable) Controller Link Units and Boards (CLK52,
CLK52-V1, or CLK53) cannot be combined with Optical Bus Controller
Link Units (CLK11) or Optical Ring (H-PCF cable) Controller Link Units
(CLK12, CLK12-V1, or CLK13).
• When wiring using the ring method, it is recommended that the nodes be
connected in order (node 1 → node 2... → node 62 → node 1) to minimize
the effect on communications time when a disconnection occurs. For
details on communications time, refer to 9-2 Communications Cycle Time.
• In CS1D Systems with Controller Link Units used in duplex operation, set
the duplex node as a startup node for data links (Data Link Start/Stop Bit
in the CS1D System CPU Unit is turned ON). If the duplex node is not set
to be the startup node for data links (i.e., if Data Link Start/Stop Bit in the
CS1D System CPU Unit is OFF), and the relevant node is operating as a
polling node, the network's data links may stop if an ACT/STB (active/
standby) switchover error occurs.
• In CS1D Systems, online replacement is possible also for all Controller
Link Units.
• A Programming Console is required to perform online replacement.
• For precautions regarding the duplex operation of Communications Units,
refer to 8-4 Precautions for Duplex Systems.
• Communicate between the CPU Unit and Communications Units by exe-
cuting the SEND(090), RECV(098), and CMND(490) instructions for the
internal logic ports (8 ports max.). Up to eight Controller Link Units can be
connected to a single CPU Unit with unit version 1.2 or later. Perform
exclusive control of the ports using the ladder program when using the
SEND(090), RECV(098), and CMND(490) instructions to perform mes-
sage servicing on multiple networks (Units).
• Up to 20,000 data link send and receive words can be allocated per node
(Unit) when using unit version 1.2 or later. Data of 20,000 words is divided
and refreshed across three CPU Unit cycles. Make sure that the response
time has been considered in the system design. Data is synchronous for
each node when data is refreshed in the CPU Unit, in the same way as for
earlier versions. If the number of data link words is 12,000 words or less,
the response with earlier unit versions (pre-Ver. 1.2) is exactly the same.
Section 1-5
33