ETC CEM3, Руководство пользователя

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62 CEM3 User Manual
When control switches to the B processor (either by automatic failover or manual control using the
switch), the displays change to the following:
The switchover from A to B for dimming happens instantaneously, so that control of lights is not lost.
However, the switchover of the user interface has built in hysteresis to eliminate bounce in certain
circumstances (for example, when DMX is lost, both processors may not see and account for the DMX
loss at exactly the same time). For this reason it may sometimes appear to take a long time for the user
interface of the backup unit to start up; however, bear in mind that despite this apparent delay,
dimming control always transfers near-instantaneously.
Configuration Management in Redundant Tracking Systems
In a tracking CEM3 system, the two processors automatically communicate and synchronize their
configurations though the backplane. No external Ethernet network is needed for the two processors
to synchronize data.
Once you make a configuration change on one processor, that change is automatically transferred to
the second processor.
When the system boots up, it is assumed that the A processor has the most recent configuration, so
the configuration will be automatically transferred from A to B if B has a different configuration.
Firmware Upgrades in Redundant Tracking Systems
When you upgrade firmware in a redundant system (either via the network or using a USB key), the
firmware upgrade is automatically transferred to both processors. Once the firmware is transferred the
upgrade will occur on both processors simultaneously. Therefore it is not necessary to update both
processors independently in a rack.
Rack 1 - CEM3 Rack
System OK
Presets Active
10.101.101.101
DMXA: 1
DMXB: Off
sACN: 2/1
[Info]
CEM3 Control
Backup Active
Processor A
Processor B