Omron CS1W-SLK11-21 - 06-2004, Manual

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Network Address Setting Section 3-4
Settings Node address switches determine the node address. The left switch sets the
ten’s digit; the right switch sets the one’s digit. The node address must be
between 01 and 62. Each SYSMAC LINK Unit in a Network must have a
unique node address.
Note (1) Always turn OFF the PLC power before setting or changing node ad-
dress.
(2) If the node address set on the Unit is outside of the allowed range (01 to
62), a communications error will occur and the red ERC indicator will light
on the Unit.
(3) Each Unit in the network must have a unique node address, so be sure
not to use the same address on more than one Unit.
(4) The token is passed from node to node according to node addresses, so
the more dispersed the node addresses are, the greater distance the to-
ken has to travel. In optical fiber systems, the communications cycle time
depends on the distance the token has to travel, so set node addresses
in the same order as the nodes’ positions in the network if possible.
(5) If you change a node address, start up the changed node last, and have
it participate in the network last.
3-4 Network Address Setting
It is necessary to set a network address on each PLC for data exchange
between networks. By setting the network address, the local node can
exchange data with a destination node even if there is another network
between them.
Setting Use the Support Software to set the network address in the routing tables in
the CPU Unit (refer to
5-2 Routing Tables ). Refer to the Support Software
operation manuals for setting details.
Setting Range A system can include up to 127 networks. The setting range of the network
address is thus 1 to 127 (decimal). (Network address 0 is used to indicate the
local network.)
3-5 Network Parameters
The operation of the SYSMAC LINK Network is determined by the network
parameters. Network parameters are set with Peripheral Devices, such as the
Support Software, and are automatically backed up within the SYSMAC LINK
Unit. The network parameters stored in the polling node are used in actual
system operation; the network parameters in other Units are ignored.
Network Parameters The following table shows the network parameters, their default values, and
the ranges within which the parameters can be set by the user. Default values
and setting ranges are in decimal.
Node number: 53 Node number: 7
Network parameter Default value Setting range
Communications cycle time Automatic 5 to 255
Maximum node address 62 2 to 62