Specifications

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 is 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 is 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 a stop, DECEL 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:

ACCELERATION LIMITS

HORSEPOWER RANGE OF ADJUSTMENT

0.25 - 20 0.1 - 3600 SEC

25 - 60 0.3 - 3600 SEC

DECELERATION LIMITS

HORSEPOWER / VOLTAGE RATING RANGE OF ADJUSTMENT

240 / 200 VAC 480 / 400 VAC 590 / 480 VAC WITHOUT 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

NOTE 1: 240/120 Vac units have the same limits as 240/200 Vac units.