Ref.no.: 003274/Revision 2.4 @2019 Control Data Systems Page 108
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Because this is a continuous process it will avoid significant lags by building a blacklist of nonresponsive
devices (i.e. routers which are not IO devices) and those will no longer be automatically queried on next
join. When a device is added to this list the
Rediscover Non Responsive
button will be activated. Clicking
this button will initiate publisher auto discovery process for those nonresponsive devices.
All publisher info gathered by the auto discovery process is added into the Publishers file
(
Monitor_Host_Publishers.conf
) and the above
Publisher
list. The changes will become effective either by
clicking the
Activate Changes
button, or by toggling
Auto Activate
radio button on. The changes also
become effective on next application start (restart/reboot). Using
Activate Changes
button has the
advantage of user control of the moment the changes become activated; it will only activate Publishers
changes in the Monitor Host. The user will have to press
Activate
button in the Modbus and the
configuration page to activate the changes in the respective module as well. Toggling
Auto Activate
radio
button will ensure the changes become activated in all modules (Monitoring Host, Modbus) when
discovery process ends. The application will decide the moment to activate, and in case of new devices
joining the network later, the activation may happen several times.
Be aware that the Publishers discovery process use Client/Server to query the concentrator object in
each device which does not have a properly configured entry in the Publishers file, nor it is in the
blacklist. The necessary aperiodic contracts will be created – in some cases, to all devices in parallel. We
currently using a narrow bandwidth: Committed Burst of one packet every 15 seconds (value: -15), for
minimum impact on the bandwidth available to application.
Do not edit the Publisher list or Channels list while
Autodiscover publishers
is active.
We recommend using
Autodiscover publishers
and
Auto Activate
to automate the process and avoid
inconsistencies.
