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BESTlogic™Plus DECS-250
Name Description Symbol
PSS Secondary
Group (Optional)
True when the PSS is using secondary settings.
PSS Speed
Failed (Optional)
True when the frequency is out of range for a
length of time calculated internally by the DECS-
250 and the PSS is active.
PSS Test On
(Optional)
True when the power system stabilizer test signal
(Frequency Response) is active.
PSS Voltage
Limit (Optional)
True when the calculated terminal voltage upper or
lower limit is reached and the PSS is active.
PSS Voltage
Unbalanced
(Optional)
True when the phase voltage is unbalanced and
the PSS is active.
SCL True when the Stator Current Limiter is active.
Setpoint at Lower
Limit
True when the active modes setpoint is at the lower
limit.
Setpoint at Upper
Limit
True when the active modes setpoint is at the
upper limit.
Soft Start Active True during softstart.
Start Status True when the unit is in Start mode.
Sync Active True when synchronization is active.
Transfer
Watchdog
True when watchdog has timed out and system
control will switch to an alternate redundant DECS-
250.
Transient Boost
Active
True when transient boost is active.
UEL True when the Under Excitation Limiter is active.
Under Frequency
V/Hz
True when the Under Frequency or the Volts/Hz
Limiter is active.
Unknown
Network Load
Share Protocol
Version
True when there is another unit on the network
whose load share protocol version is not the same
as this units load share protocol version.
VAR Controller
Active
True when the unit is in VAR mode.
VAR Limiter
Active
True when the Var Limiter is active.
Voltage Matching
Active
True when Voltage Matching is active.
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