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Redundant Star Network
The UOC does not support star topologies which mix redundant and
non-redundant connectivity. Downlink star networks must be set up
as exclusively redundant or exclusively non-redundant.
Considerations for components that connect to a UOC’s downlink
non-redundant or redundant star network are summarized in the
following table.
Component
Type
Comments
ControlEdge
UOC CPM
Important properties of UOC CPM communications on the downlink
network are configured on the UOC Platform Block in Control Builder.
This includes configuration of the UOC DHCP server for assigning
EPM IP addresses. It also includes setting the Downlink Network
Configuration to “Non-redundant” in the case of a non-redundant star
network or “Star-PRP” in the case of a redundant star network.
ControlEdge
900 I/O
Racks with
EPMs
Before it is inserted into its slot, the 100X rotary switch on an EPM
board must be set to indicate I/O network connectivity. For a non-
redundant or redundant star network, this is done by setting it to
position 4. The IP address of the EPM is assigned by the UOC CPM
based on the module number set on the 10X and 1X rotary switches.
Ensure that the values within the range of 1-12 are used, as these are
the valid values. This too must be set before the EPM is inserted into
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