J1939 Interface 6-15
© 2012 HMS Industrial Networks AB
Doc.Id. HMSI-168-25
The Offline Detection Message may be enabled or disabled in the configuration.
When the message is enabled, the Offline Detection Time determines how often
the Offline Detection Message will be sent. This effectively determines the time
within which an offline condition will be detected. If the application requies that
the offline status be detected quickly the time should be set to a smaller value; if
the application does not require quick detection the time may be set to a larger
value.
Note:
The offline detection mechanism is always active regardless of whether the
X-gateway is in Run or Idle mode. The module will transmit Offline Detection
Messages when it is in Idle mode. This ensures that the online status being
reported is always correct.
Important:
If periodic transmission of PGN 61184 could cause
adverse affects in the network application, make sure to disable the
Offline Detection in the configuration.
Important:
The Offline Detection Time should be set as large as the
application will allow. Although setting the time to a small value will
provide quicker detection of an offline condition, there is a trade-off in
that the Offline Detection Message is being transmitted more often.
This trade-off could affect the performance of the X-gateway and of
the J1939 network overall.