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6 - PARAMETER DESCRIPTION
P16 Decel Begin Level CFN 15
LED Display LCD Display
Range 1 % – 100% of phase angle firing (Default 40%)
Description Stop Mode (P15/CFN14) set to Voltage Deceleration:
The voltage deceleration profile utilizes an open loop S-curve voltage ramp profile. The Decel Begin Level
parameter sets the initial or starting voltage level when transferring from running to deceleration. The
deceleration beginning level is not a precise percentage of actual line voltage, but defines a point on the
S-curve deceleration profile.
A typical voltage decel begin level setting is between 30% and 40%. If the motor initially surges (oscillates)
when a stop is commanded, decrease this parameter value. If there is a sudden drop in motor speed when a
stop is commanded, increase this parameter value.
Stop Mode (P15/CFN14) set to TruTorque Deceleration:
Not used when the Stop Mode parameter is set to TruTorque Decel. The TruTorque beginning deceleration
level is automatically calculated based on the motor load at the time the stop command is given.
z NOTE: It is important that the (P75 / FUN06) - Rated Power Factor parameter is set properly so that the
actual deceleration torque levels are the levels desired.
See Also Stop Mode (P10 / CFN 14) parameter on page 87.
Decel End Level (P17 / CFN 16) parameter on page 89.
Decel Time (P18 / CFN 17) parameter on page 90.
Controlled Fault Stop Enable (P43 / PFN 12) parameter on page 105.
Rated Power Factor (P75 / FUN 06) parameter on page 125.
Theory of Operation section 7.4, Deceleration Control on page 149.
CFN: Decel Begin
15 40 %
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