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Settings [PortA_AdminEdge] and [PortA_AutoEdge] †: are provided for a port, which is
able to operate as ‘Edge’. Edge will not be joined for the spanning tree computation, so
Edge port is able to have the communication immediately when the LAN connection is
started (link-up; Notice that the user has to know that no loop will occur in the network,
in advance). When On is set for the [PortA_AdminEdge], the Port A unconditionally
operates as Edge. PortA can detect Edge port itself, when On is set for the
[PortA_AutoEdge].
Setting [PortA_PathCost]: is used to set the distance for the root bridge (path cost), when
the port is used in the LAN network, actually. As a rule, the setting value depends on the
communication bandwidth.
Setting [PortA_Priority]: is set a priority value for the port. Similar to the setting
[BridgePrioriy], a port having the smallest number can have the highest priority. Note
that a number can be set in 16 steps
†Note: Port A (connection for LAN_A) is located at C11 of IED. The second Port B
(connection for Port B) is located at C12 and has similar settings. See Table 11.2-6
for the IP addresses examples. The user can find the contents about LAN
communication module in Chapter
Technical description: Signal processing and
communication module
.
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