Service manual

Encore — Configuration Manual 33
Overview
Redundancy
To ensure reliable Encore system operation, various forms of redundancy
are available. For example, System Controller frames can be equipped with
redundant power supplies. The power supply with the greatest load is
automatically used by the frame. Providing power from separate circuits to
each power supply helps ensure power to the frame will not be interrupted.
System Controller frame cans also be equipped with two System Controller
Boards (SCBs). Applications running on different SCBs can be configured
in Master/Slave pairs, such that if one SCB fails the applications on the
other SCB automatically take control without any interruption of system
operation. In Encore 1.7.3 and newer software, redundancy mode informa
-
tion is stored in the memory of the frame and validated. This ties redun-
dancy mode settings to the frame slot, not the SCB. Applications can be
Master/Slave paired on SCBs in the same frame, or SCBs in different
frames can be used to provide even more robust redundancy. When SCB
redundancy is being used, the databases on both SCBs must remain syn
-
chronized for proper operation should a change-over occur (Figure 17).
Figure 17. Encore Redundancy
Database Backups
The Encore system’s comprehensive database is an extremely important set
of information, since it supplies data to all the other system components.
This database can be backed up by copying the OMN directory and its col
-
Mirror Master
Panel Server
Mirror Master
Router Controller
Primary SCB (left slot)
Mirror Slave
Panel Server
Power Supply #1
Power Supply #2
Mirror Slave
Router Controller
Backup SCB (right slot)
Encore System Controller Frame
Router Matrix Frame
Matrix
Controller #1
Matrix
Controller #2
Power Supply #1
Power Supply #2
8531_05r0
Engineering Workstation PC
Encore System database
Sharer
Each power supply can
independently power
that entire frame.
When devices come
on-line their applications
receive configuration
information from
the Sharer.
Mirrored Master and Slave applications each hold a complete set of
configuration information for what they control.
Failure of one mirrored device immediately makes its twin take control.
Ethernet
Network
Router Control
Panel
Router Control
Panel
If the Sharer is not available
when an application comes
on-line, it will use its local
version of configuration
information.
If neither the Master or Mirror
Router Controller is available,
the Matrix retains its current
crosspoint
settings.