51
DECELERATION LIMITS
HORSEPOWER / VOLTAGE RATING
HORSEPOWER / VOLTAGE RATINGHORSEPOWER / VOLTAGE RATING
HORSEPOWER / VOLTAGE RATING RANGE OF ADJUSTMENT
RANGE OF ADJUSTMENTRANGE OF ADJUSTMENT
RANGE OF ADJUSTMENT
240 / 200 Vac
240 / 200 Vac240 / 200 Vac
240 / 200 Vac 480 / 400 Vac
480 / 400 Vac480 / 400 Vac
480 / 400 Vac 590 / 480 Vac
590 / 480 Vac590 / 480 Vac
590 / 480 Vac WITHOUT DB
WITHOUT DBWITHOUT DB
WITHOUT DB WITH DB
WITH DBWITH DB
WITH DB
(NOTE 1) (NOTE 2)
0.25 - 7.5 HP 1 - 7.5 HP ---- 0.3 - 3600 SEC 0.1 - 3600 SEC
10 - 15 HP 10 - 20 HP 1 - 7.5 HP 0.5 - 3600 SEC 0.1 - 3600 SEC
20 - 30 HP 25 - 60 HP 10 - 20 HP 1.0 - 3600 SEC 0.2 - 3600 SEC
---- ---- 25 - 60 HP 2.0 - 3600 SEC 0.2 - 3600 SEC
8 ACCEL (ACCELERATION TIME)
ACCEL sets the acceleration rate for all speed reference sources (keypad, speed
pot, 4-20 mA, 0-10 VDC, jog, and the preset speeds). The ACCEL setting is the
time to accelerate from 0 Hz to the BASE FREQUENCY (Parameter 18). The
range of adjustment for ACCEL depends on horsepower. Refer to the table below:
Example: If ACCEL is set to 30 seconds, and the BASE FREQUENCY is set to
60 Hz, the drive will ramp from 0 Hz to 60 Hz in 30 seconds. This is a linear
function, therefore the drive would ramp up to 30 Hz in 15 seconds, etc.
NOTE: The ability to accelerate a given load at a particular rate will be limited by
the output power capability of the drive/motor combination. The acceleration of
high-inertia and high-friction loads may be affected by the current limiting
characteristics of the drive. See Parameters: 16 - CURRENT, 19 - FX BOOST,
and 20 - AC BOOST for more information.
9 DECEL (DECELERATION TIME)
DECEL sets the deceleration rate for all speed reference sources. The DECEL
setting indicates the time to decelerate from BASE FREQUENCY to 0 Hz. As
with Parameter 8 - ACCEL, this is a linear function. If the drive is set to COAST
to stop, this parameter will have no effect when a STOP command is given. The
range of adjustment for DECEL depends on horsepower, voltage, and whether
Dynamic Braking (DB) is being used. Refer to the table below:
HORSEPOWER
HORSEPOWERHORSEPOWER
HORSEPOWER RANGE OF ADJUSTMENT
RANGE OF ADJUSTMENTRANGE OF ADJUSTMENT
RANGE OF ADJUSTMENT
0.25 - 20 0.1 - 3600 SEC
25 - 60 0.3 - 3600 SEC
ACCELERATION LIMITS
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