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DECS-150 Regulation
External Setpoint Tracking
For critical applications, a second DECS-150 can provide backup excitation control. The DECS-150 (style
xxxxxxx2) allows for excitation redundancy by providing external tracking and transfer provisions between
DECS-150 controllers. The secondary DECS-150 can be configured to track the primary DECS-150
setpoint. Proper redundant excitation system design allows for removal of the failed system.
Like internal tracking, external setpoint tracking uses enable/disable, delay, and traverse rate settings.
Tracking Comms Loss Alarm
An alarm can be configured to annunciate when the DECS-150 is configured as the secondary DECS-150 and has
lost tracking communications from the primary DECS-150.
Periodic testing of the backup system must be performed to ensure
that it is operational and can be placed in service without warning.
Figure 5-5. Autotracking Screen
Setpoint Configure
BESTCOMSPlus Navigation Path: Settings Explorer, Operating Settings, Setpoint Configure
When the Auto Save setting is enabled, the DECS-150 automatically saves the active, externally driven,
raise/lower, pre-position, and tracking setpoints in ten-minute intervals. Otherwise, the setpoint which was
last sent to the DECS-150 via BESTCOMSPlus is retained. The Setpoint Configure screen is illustrated in
Figure 5-6.
Figure 5-6. Setpoint Configure Screen
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