P8 Ramp Time 1 QST 08, CFN 02
LED Display LCD Display
Range 0 – 300 seconds (Default 15)
Description The Ramp Time 1 parameter is the time it takes for the starter to allow the current, voltage, torque or power
(depending on the start mode) to go from its initial to the maximum value. To make the motor accelerate
faster, decrease the ramp time. To make the motor accelerate slower, increase the ramp time.
A typical ramp time setting is from 15 to 30 seconds.
If the ramp time expires before the motor reaches full speed, the starter maintains the maximum current level
until either the motor reaches full speed, the UTS timer expires, or the motor thermal overload trips.
z NOTE: Setting the ramp time to a specific value does not necessarily mean that the motor will take this
time to accelerate to full speed. The motor and load may achieve full speed before the ramp time expires if
the application does not require the set ramp time and maximum current to reach full speed. Alternatively, the
motor and load may take longer than the set ramp time to achieve full speed.
See Also Initial Current 1 (P6 / QST 06) parameter on page 79.
Maximum Current 1 (P7 / QST 07) parameter on page 80.
Up To Speed Time (P9 / QST 09) parameter on page 82.
Start Mode (P10 / CFN 01) parameter on page 83.
Kick Level 1 (P13 / CFN 10) parameter on page 86.
Kick Time 1 (P14 / CFN 11) parameter on page 86.
Theory of Operation section 7.3.1, Current Ramp Settings, Ramps and Times on page 140.
81
6 - PARAMETER DESCRIPTION
CFN: Ramp Time 1
02 15 sec
QST: Ramp Time 1
08 15 sec
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