Echelon SmartServer 2.2 - Manual (Page 229)

230 Using the SmartServer as Network Management Tool
Use Offline Delay Specify the period of time (in seconds) that the SmartServer waits before
marking a data point and its parent device offline (red) in the SmartServer
tree after the LON driver detects that the data point is offline.
For example, if you poll a data point every 5 minutes and you set Use
Offline Delay to 1 hour, it takes 12 polls for the data point and its parent
device to be marked offline—even though the LON driver detected that it
could not communicate with the data point after the first poll.
5. Click Advanced to set the following timing properties for the channel:
Use Transmit
Timer You can change the interval (in milliseconds) network messages wait for
confirmation before being re-sent over the network. The default value is
96 ms for FT-10 channels and 512 ms for PL channels. If this option is
cleared (it is cleared by default), the interval is calculated based on the
network topology, specifically the transmission time for each channel that
the message must cross. By default, the transmission time for each
channel is determined by its type. However, this can be overridden with
the Use Round-Trip Delay property.
For more information on configuring this property for a power line
repeating network, see the SmartServer 2.2 Power Line Repeating
Network Management Guide.
Use Retry Count You can change the number of times a network message is re-sent when
no confirmation is received. The default value is 3 attempts for FT-10
channels and 5 attempts for PL-20 channels. If this option is cleared (it is
cleared by default), a default value, which can range from 0 to 15
attempts, is calculated based on network topology. Typically, the default
retry count is set to 3 attempts; however, if a message must pass through
certain channel types, the default may be increased. For example, if a
message must cross a PL-20 channel, the default retry count would be
increased to 5 attempts.
For more information on configuring this property for a power line
repeating network, see the SmartServer 2.2 Power Line Repeating
Network Management Guide.
Use Number of
Slots
Use Slot Width
The Use Number of Slots and Use Slot Width properties are used to
calculate how long the SmartServer waits before sending messages to the
devices on the power line repeating network. These settings affect the
traffic initiated by the SmartServer when it receives direct messages or
events from the devices on the network.
Specify the maximum number of slots used for spacing packets on a
power line repeating channel (the default value is 0). You can specify the
width of the slots in the Use Slot Width property (the default value is 0).
If Use Number of Slots is set to n, then the SmartServer uses a random
slot between 0 to n-1 for sending messages, and this slot is then multiplied
by the value in the Use Slot Width box, and 100ms.