S&P VFKB 24 Notice De Montage Et D'utilisation page 26

11- TRIMPOT ADJUSTMENTS
The drive contains trimpots which are factory set for most applications.
WARNING! If possible, do not adjust trimpots with the main power applied. If adjustments
are made with the main power applied, an insulated adjustment tool must be used and
safety glasses must be worn. High voltage exists in this drive. Fire and/or electrocution can
result if caution is not exercised.
We recommend modifying the trimpots indicated in this chapter only and after having read about
their function. An incorrect position of trimpots can destroy the motor.
11.1 MINIMUM SPEED – MIN
Sets the minimum speed of the motor.
The MIN Trimpot is factory set to 10% of frequency setting.
For a higher minimum speed setting, rotate the MIN Trimpot clockwise.
11.2 MAXIMUM SPEED – MAX
Sets the maximum speed of the motor. The MAX Trimpot is factory set to 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.
Before setting a higher maximum speed check on the motor is enough powered to bear this
speed.
11.3 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 5 seconds. For a longer acceleration time, rotate the
ACCEL Trimpot clockwise. For more rapid acceleration, rotate the ACCEL Trimpot
counterclockwise.
11.4 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 5 seconds. For longer deceleration time, rotate the DECEL
Trimpot
counterclockwise.
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.
11.5 JOG ( a second preset or forced speed)
The JOG feature requires the installation of a remote switch or contact. The contact must be
wired to the two JOG terminals.
When the contact is closed the JOG trimpot is used to set the "jog" speed.
When the contact is opened, the main speed potentiometer is used for speed setting.
Factory setting: 100%
clockwise. For more rapid deceleration, rotate the DECEL Trimpot