Nidec Digistart D4 User Manual

Operation
3
6
5
4
2
1
1: Initial Current (parameter 2C)
2: Current Limit (parameter 2D)
3: Start Ramp Time (parameter 2B)
4: Full voltage
5: Motor 1 current
6: Motor 2 current
Time
Adaptive Control for Starting
In an adaptive control soft start, the soft starter adjusts the current in order to start the
motor within a specified time.
NOTE
The soft starter will apply the current limit on all soft starts, including adaptive
control. If the current limit is too low or the start ramp time (parameter 2B) is too
short, the motor may not start successfully.
Speed
0
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
18735.A
1
2
1. Constant Acceleration
2. Start Ramp Time (parameter 2B)
Time
• Fine-tuning Adaptive Control
If the motor does not start or stop smoothly, adjust the adaptive control gain (parameter 2I).
The gain setting determines how much the soft starter will adjust future adaptive control
starts and stops, based on information from the previous start. The gain setting affects both
starting and stopping performance.
• If the motor accelerates or decelerates too quickly at the end of a start or stop,
increase the gain setting by 5%~10%.
• If the motor speed fluctuates during starting or stopping, decrease the gain setting
slightly.
NOTE
The soft starter tunes Adaptive Control to match the motor. Changing the following
parameters will reset Adaptive Control and the first start/stop cycle will use
constant current start/timed voltage ramp stop: 1B Motor Full Load Current, 2D
Current Limit, 2I Adaptive Control Gain.
8.7 Stop Methods
Coast to Stop
Coast to stop lets the motor slow at its natural rate, with no control from the soft starter. The
time required to stop will depend on the type of load.
40

Nidec Digistart D4 Specifications

General

Brand	Nidec
Model	Digistart D4
Category	Controller
Language	English