ABB ACS55-01N-01A4-2 [49/55] Start stop

ABB ACS55-01N-01A4-2 [49/55] Start stop
49
Actual signals and parameters of ACS55
No.
Name/Value
Description
Def
2021
MIN FREQUENCY
TO MODULATE
Defines the absolute frequency below which the converter gives zero
voltage to the motor.
0.5 Hz
0…3 Hz
Minimum frequency to modulate
21 START/STOP
Start and stop modes of the motor
2102
STOP FUNCTION
Selects the motor stop function.
RAMP
COAST
Stop by cutting off the motor power supply. The motor coasts to a stop.
RAMP
Stop along a ramp.
22 ACCEL/DECEL
Acceleration and deceleration times
2202
ACCELERATION
TIME
Defines the acceleration time, i.e. the time required for the speed to
change from zero to the speed defined by parameter 2008 MAXIMUM
FREQUENCY.
- If the speed reference increases faster than the set acceleration rate,
the motor speed will follow the acceleration rate.
- If the speed reference increases slower than the set acceleration rate,
the motor speed will follow the reference signal.
- If the acceleration time is set too short, the drive will automatically
prolong the acceleration in order not to exceed the drive operating
limits.
5
0…100 s
Time
2203
DECELERATION
TIME
Defines the deceleration time i.e. the time required for the speed to
change from the value defined by parameter 2008 MAXIMUM
FREQUENCY to zero.
- If the speed reference decreases slower than the set deceleration rate,
the motor speed will follow the reference signal.
- If the reference changes faster than the set deceleration rate, the
motor speed will follow the deceleration rate.
- If the deceleration time is set too short, the drive will automatically
prolong the deceleration in order not to exceed drive operating limits.
5
0…100 s
Time
26 MOTOR CONTROL
Motor control variables
2603
IR COMP
VOLTAGE
Defines the output voltage boost at zero speed (IR compensation) in
Volts. The function is useful in applications with high break-away torque.
To prevent overheating, set IR compensation voltage as low as
possible.
The figure below illustrates the IR compensation.
23
0…80 V
Value in Volts
2604
IR COMP
FREQUENCY
Defines the frequency at which the IR compensation is 0 V. See the
figure for parameter 2603 IR COMP VOLTAGE.
50
0…250 Hz
Value in Herz
2605
U/F RATIO
Selects the voltage to frequency (U/f) ratio below the field weakening
point.
LINEAR

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