Technical information

5 – PARAMETER DESCRIPTIONS
48
P9 Up To Speed Time QST 09
LCD Display
QST: UTS Time
09 20 sec
Range 1– 900 Seconds (Default 20 sec)
Description The Up To Speed Time parameter sets the maximum acceleration time to full speed that the motor
can take. A stalled motor condition is detected if the motor does not get up-to-speed before the up-to-
speed timer expires. This allows the programming of a maximum acceleration time for the motor.
The motor is considered up-to-speed once the current stabilizes below 175 percent of the FLA value
and the ramp time expires.
NOTE: During normal acceleration ramps, the up-to-speed timer has to be greater than the sum of
the highest ramp time in use and the kick time. The up-to-speed timer does not automatically change
to be greater than the ramp time. If a ramp time greater than the up-to-speed timer is set, the starter
will declare an up-to-speed fault every time a start is attempted.
NOTE: When the Start Mode parameter is set to Open-Loop Voltage Ramp, the UTS timer acts as
an acceleration kick. When the UTS timer expires, full voltage is applied to the motor. This feature
can be used to reduce motor oscillations if they occur near the end of an open loop voltage ramp start.
NOTE: When the Starter Type parameter is set to Wye-Delta, the UTS timer is used as the transition
timer. When the UTS timer expires, the transition from Wye starting mode to Delta running mode
takes place.
Fault Code 01 - Up to Speed Fault is declared when a stalled motor condition is detected.
See Also Ramp Time 1 parameter on page 47
Kick Time 1 parameter on page 52
Ramp Time 2 parameter on page 57
Kick Time 2 parameter on page 58
Start Mode parameter on page 49
Starter Type parameter on page 81
Application section 6.2.1, Wye Delta, on page 91
Theory of Operation section 8.3, Acceleration Control, on page 118