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FIGURE 18 - ACCELERATION
TRIMPOT RANGE
(Shown Factory Set to 1.5 Seconds)
FIGURE 19 - DECELERATION
TRIMPOT RANGE
(Shown Factory Set to 1.5 Seconds)
FIGURE 20 - SLIP
COMPENSATION TRIMPOT
RANGE
(Shown Factory Set to 1.5 Volts/Hz)
FIGURE 17 - MAXIMUM SPEED
TRIMPOT RANGE
(Shown Factory Set to 100% of
Frequency Setting)
7.2 MAXIMUM SPEED (MAX):
Sets the maximum
speed of the motor. The MAX Trimpot is factory
set for 100% of frequency setting. For a lower
maximum speed setting, rotate the MAX Trimpot,
counterclockwise. For a higher maximum speed
setting, rotate the MAX Trimpot clockwise. See
Figure 17.
7.3 ACCELERATION (ACCEL):
Sets the amount of
time for the motor to accelerate from zero speed
to full speed. The ACCEL Trimpot is factory set to
1.5 seconds. For a longer acceleration time, rotate
the ACCEL Trimpot clockwise. For more rapid
acceleration, rotate the ACCEL Trimpot
counterclockwise. See Figure 18.
Note:
Rapid acceleration settings may cause the
current limit circuit to activate, which will extend
the acceleration time.
7.4 DECELERATION
(DECEL):
Sets the amount of
time for the motor to decelerate from full speed to
zero speed. The DECEL Trimpot is factory set to
1.5 seconds. For longer deceleration time, rotate
the DECEL Trimpot clockwise. For more rapid
deceleration, rotate the DECEL Trimpot
counterclockwise. See Figure 19.
Application
Note:
On applications with high
inertial loads, the deceleration may automatically
increase in time. This will slow down the rate of
speed of decrease to prevent the bus voltage from
rising to the Overvoltage Trip point. This function
is called Regeneration Protection. It is
recommended that for very high inertial loads that
both the ACCEL and DECEL Trimpots be set to
greater than 10 seconds.
7.5 SLIP COMPENSATION (COMP):
Sets the amount
of Volts/Hz to maintain set motor speed under
varying loads. The COMP Trimpot is factory set to
1.5 Volts/Hz, which provides excellent speed
regulation for most motors. To increase the slip
compensation, rotate the COMP Trimpot clockwise.
To decrease the slip compensation, rotate the
COMP Trimpot counterclockwise. See Figure 20.
