Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Manual do Utilizador descarregar pdf (Página 39)

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)

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 201 202

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Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Manual do Utilizador Página 39