Nidec Digistart D4 - Typical Control Methods

Operation
• Parameter 7D Input A Initial Delay: sets a delay before the soft starter monitors the
state of the input, after the start signal. For example, a delay may be required to
allow time for pipeline pressure to build up.
• Parameter 7J Input A Name: select a name, eg 'Input A Trip' (optional).
8.5 Typical Control Methods
The requirements of an application differ between each installation, but the methods listed
below are often a good starting point for common applications.
Application
Start Mode
Start Ramp Time
(seconds)
Initial Current
(%FLC)
Current Limit
(%FLC)
Stop Mode
Stop Time (seconds)
Bow thruster
Constant
Current
5 100 400
Coast To Stop
n/a
Centrifuge (Separator)
Constant
Current
1 200 450
Coast To Stop
n/a
Chipper
Constant
Current
1 200 450
Coast To Stop
n/a
Compressor -
reciprocating - loaded
Constant
Current
1 200 450
Coast To Stop
n/a
Compressor -
reciprocating - unloaded
Constant
Current
1 200 400
Coast To Stop
n/a
Compressor - screw -
loaded
Constant
Current
1 200 400
Coast To Stop
n/a
Compressor - screw -
unloaded
Constant
Current
1 200 350
Coast To Stop
n/a
Conveyor - horizontal
Constant
Current
5 200 400
TVR Soft Stop
10
Conveyor - inclined
Constant
Current
2 200 450
Coast To Stop
n/a
Conveyor - vertical
(bucket)
Constant
Current
2 200 450
Coast To Stop
n/a
Crusher - cone
Constant
Current
1 200 350
Coast To Stop
n/a
Crusher - jaw
Constant
Current
1 200 450
Coast To Stop
n/a
Crusher - rotary
Constant
Current
1 200 400
Coast To Stop
n/a
Debarker
Constant
Current
1 200 350
Coast To Stop
n/a
Fan - axial (damped)
Constant
Current
1 200 350
Coast To Stop
n/a
Fan - axial (undamped)
Constant
Current
1 200 450
Coast To Stop
n/a
Fan - centrifugal
(damped)
Constant
Current
1 200 350
Coast To Stop
n/a
Fan - centrifugal
(undamped)
Constant
Current
1 200 450
Coast To Stop
n/a
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