Starting methods, Soft start with selectable kickstart – Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE User Manual

Page 39

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3-2

SMC Dialog Plus Smart Motor Controller

Starting Methods

The following starting methods are standard within the controller:

Soft Start with Selectable Kickstart

Current Limit Start

Dual Ramp Start

Full Voltage Start

Optional features include:

Soft Stop

Pump Control

Preset Slow Speed

SMB

Smart Motor Brake

Accu-Stop

/Slow Speed with Braking

Soft Start with Selectable Kickstart

This method has the most general application. The motor is given an
initial torque setting, which is user adjustable from 0 to 90% of
locked rotor torque. From the initial torque level, the output voltag
to the motor is steplessly increased during the acceleration ramp time,
which is user adjustable from 0 to 30 seconds. If, during the voltag
ramp operation, the SMC Dialog Plus controller senses that the moto
has reached an up-to-speed condition, the output voltage will
automatically switch to full voltage.

The kickstart feature provides a boost at start-up to break away loads
that may require a pulse of high torque to get started. It is intended to
provide a current pulse of 550% of full load current and is user
adjustable from 0.0 to 2.0 seconds.

Figure 3.2 Soft Start with Selectable Kickstart

Start Run

Kickstart

Initial

Torque

100%

Percent

Voltage

Time (seconds)

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