Справочник Пользователя для Toshiba VF010H05

Provides multiple choices for starting ramps that can be 

selected  for particular loads and applications. 

SP2.1 Start Control Mode: Start Ramp 1, Jog, Start 

Disabled, Tach Ramp, Custom Accel Curve, Dual 

Ramp, Start Ramp 2.  

•  Dual Ramp: The dual ramp mode works in 

conjunction with External Input #3. This allows 

the user to switch between the two start ramps 

without having to reconfigure the start mode. (For 

details on configuring External Input #3 for DUAL 

RAMP see Setpoint Page 6.)

•  Custom Accel Curve: Allows the user to 

custom design the acceleration start curve to the 

application. (See setpoint page 7 for configuration 

setup.) Note: If Custom Accel Curve has not 

been enabled in setpoint page 7, the soft starter 

will ignore the start control mode and read this 

setpoint as disabled.

•  Tach Ramp: See setpoint page 6 for configuration 

setup of tachometer input.

SP2.2 jog Voltage: The voltage level necessary to cause 

the motor to slowly rotate. 

SP2.3 Start Ramp 1 Type: The ramp type can be setup for 

either Voltage or Current. If Voltage is selected, 

initial voltage, ramp time and current limit are 

adjustable. If Current is selected, initial current, 

ramp time and maximum current are adjustable.

 

 

•  Voltage Ramping is the most reliable starting 

method, because the starter will eventually 

reach an output 

voltage high enough to 

draw full current and 

develop full torque. 

This method is useful 

for applications where 

the load conditions 

change frequently and 

where different levels 

of torque are required. 

Typical applications 

include material handling 

conveyors, positive 

displacement pumps and drum mixers.

 

  Voltage is increased from a starting point (Initial 

Torque) to full voltage over an adjustable period of 

time (Ramp Time). To achieve Voltage Ramping, 

select VOLTAGE for the START RAMP #1 TYPE 

setpoint and set CURRENT LIMIT #1 setpoint 

to 500% (the maximum setting). Since this is 

essentially Locked Rotor Current on most motors, 

there is little or no Current Limit effect on the 

Ramp profile.

 

• 

Voltage Ramping with Current Limit is the most 

used curve and is similar to voltage ramping. 

However, it adds an adjustable maximum current 

output. Voltage is increased gradually until the 

setting of the Maximum Current Limit setpoint 

is reached. The voltage is held at this level until 

the motor accelerates to full speed. This may be 

necessary in applications where the electrical 

power is limited. Typical applications include 

portable or emergency generator supplies, utility 

power near the end of a transmission line and 

utility starting power demand restrictions. Note: 

Using Current Limit will override the Ramp Time 

setting if necessary, so use this feature when 

acceleration time is not critical. To achieve Voltage 

Ramping with Current Limit, select VOLTAGE for 

the START RAMP #1 setpoint and set CURRENT 

LIMIT #1 setpoint to a desired lower setting, as 

determined by your application requirements.

 Start Ramp 1 Type: Current 

 

 

Current Ramping (Closed Loop Torque Ramping) 

is used for smooth linear acceleration of output 

torque. This ramp is only used on some conveyor 

systems (long haul or down hill). Output voltage 

is constantly updated to provide the linear 

current ramp, and therefore the available torque 

is maximized at any given speed. This is for 

applications where rapid changes in torque may 

result in load damage or equipment changes. 

Typical applications include overland conveyors 

if belt stretching occurs; fans and mixers if blade 

warping is a problem; and material handling 

systems if stacked products fall over or break. 

This feature can be used with or without the 

Maximum Current Limit setting. To achieve 

Current Ramping select CURRENT for START 

RAMP #1 TYPE setpoint and the MAXIMUM 

CURRENT #1 setpoint to the desired level.

 

Current Limit Only: (Current Step) start uses the 

Current Limit feature exclusively. This method of 

starting eliminates the soft start voltage/current 

ramp and instead, maximizes  the effective 

application of motor torque within the limits of the 

motor. In this mode, setpoint RAMP TIME #1 is 

set to zero (0), so the output current jumps to the 

current limit setting immediately. Typically used 

in with a limited power supply, when starting a 

difficult load such as a centrifuge or deep well 

pump, when the motor capacity is barely adequate 

(stall condition or overloading occurs) or if other 

starting modes fail. Since ramp times are set to 

zero (0). START RAMP #1 TYPE is set to either 

VOLTAGE or CURRENT.

•  Initial Torque (Initial Voltage #1 or Initial

Current #1): Sets the initial start point of either