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Determining which device should be the Master Device in TAC Xenta Group

Determining which device should be the Master Device in TAC Xenta Group

Issue

In a TAC Xenta group, there must be one TAC Xenta which is the master, which TAC Xenta device in the group is most suitable to be the master in the group?

Product Line

TAC Vista

Environment

  • TAC Xenta 401
  • TAC Xenta 301/302
  • TAC Xenta 281/282

Cause

TAC Xenta group master devices have additional communication responsibilities to the Vista Server -- reporting online/offline status of their group members.

Resolution

During network planning, choose the master device to be the group member with the:

  • least amount of SNVTs
  • least TACNV
  • least amount of I/O modules
  • least memory used
  • least communication
  • least processing load

If adding controllers in an ad-hoc manner, the first controller commissioned must be the group Master to enable communication with any other controllers. If the group master is offline, the whole group will be offline.

Remember that when a controller is added to a group all controllers in that group need to have the application and parameters downloaded. If the Master Device is changed after the group is set up you will also need to download every controller, Download the new Master first so that as you download the rest of the controllers they will come online after the download.

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