Nidec D3-0023-B, Руководство пользователя

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48
Digistart D3: User Guide
Issue: G
7 Operation
7.1 Start, Stop and Reset Commands
The soft starter can be controlled in three ways:
• using the buttons on the keypad
•
via remote inputs
• via a serial communication link
The LCL/RMT button controls whether the Digistart D3 will respond to local control (via the keypad) or remote control
(via the remote inputs).
• The Local LED on the keypad is on when the soft starter is in local control mode and off when the soft
starter is in remote control mode.
• The Remote LED on the Digistart D3 is on when the soft starter is in Remote mode and off when in Local
mode. The Remote LED is located on the main body of the starter (behind the keypad) and is only visible if
the keypad is remotely mounted.
Control via the fieldbus communication network is always enabled in local control mode, and can be enabled or
disabled in remote control mode (Pr 3O Comms in Remote ). Control via the serial communication network requires
an optional communication module.
The
STOP
button on the keypad is always enabled.
To reset a trip on the soft starter, press the RESET button on the keypad or activate the Reset remote input.
NOTE
Adaptive Control, Jog, Brake and PowerThrough functions are not supported with inside delta (six-wire)
operation. See Inside Delta Operation on page 55 .
7.2 Soft start methods
Soft starters offer a variety of methods to control motor starting. Each soft start method uses a different primary
control parameter.
Soft Start Method Parameter
Controlled
Performance Parameters Influenced
Timed Voltage Ramp Voltage Start current, start torque, acceleration
Constant Current Current Start torque, acceleration
Torque Control Torque Start current, acceleration
Adaptive Control Acceleration Start current, start torque
Best results are obtained by selecting the soft start method that directly controls the parameter of most importance for
the application. Typically soft starters are used to limit motor start current or control load acceleration and/or
deceleration.
The Digistart D3 offers Constant Current or Adaptive Control. Use Pr 2A to select the soft start method.
To Control Use
Motor Start Current Constant Current
Motor/Load Acceleration Adaptive Control
To soft start the motor, press the START button on the keypad or activate the Start remote input. The motor will start
using the start mode selected in Pr 2A.