E6581301

6.7Operation frequency

6.7.1Start frequency/Stop frequency!

￿￿￿￿: Start frequency setting!

￿￿￿￿: Stop frequency setting

￿￿￿￿: Start frequency"Stop frequency operation selection

Function

The frequency set with the parameter ￿￿￿￿ is put out as soon as operation is started. Use the ￿￿￿￿ parameter when a delay in response of starting torque according to the acceleration/deceleration time is probably affecting operation. Setting the starting frequency to a value from 0.5 to 2.0Hz (max. 5Hz) is recommended. The occurrence of an overcurrent can be suppressed

by setting this frequency below the rated slippage of the motor. If 0 speed torque is needed (￿￿=￿, ￿), set ￿￿￿￿, ￿￿￿￿ at 0.0Hz.

• At start up : frequency set with ￿￿￿￿ is put out immediately.

• At stop : The output frequency drops to 0Hz immediately by the frequency set with

￿￿￿￿.

￿

Use the ￿￿￿￿ parameter when changing operation of the range of ￿￿￿￿#output frequency#

￿￿￿￿.￿

The operation of the range of ￿￿￿￿#output frequency#￿￿￿￿ is following. ￿

￿￿￿￿=0" Stop operating by the condition ￿￿￿￿#output frequency

[Parameter setting]

 

 

 

6

 

Title

Function

Adjustment range

Default setting

 

 

￿￿￿￿￿

Starting frequency setting

￿￿~￿￿￿ Hz

￿￿￿

 

 

 

 

 

 

 

 

 

 

￿￿￿￿￿

Stop frequency setting

￿￿~￿￿￿ Hz

￿￿￿

 

 

 

￿￿￿￿￿

Start frequency/Stop frequency operation selection

￿"Stop operating

￿￿

 

 

 

￿"Continue operating

 

 

 

 

 

 

 

 

Output frequency [Hz] !

 

Start frequency setting

￿￿￿￿

 

Stop frequency setting

￿￿￿￿

 

 

0

Time [s]

Note: Set these parameters so that the start frequency

 

￿￿￿￿

 

is higher than the stop frequency

￿￿￿￿

.

 

 

 

 

 

 

 

If the

￿￿￿￿

-set frequency is lower than the

 

￿￿￿￿

 

-set frequency, the reference frequency must be

higher than the ￿￿￿￿-set frequency to start the motor.

 

 

 

 

If both ￿￿￿￿ and ￿￿￿￿ are set to ￿￿ Hz, the motor will start even if the frequency set is 0.0Hz.

6.7.2Run/Stop control with frequency setting signals

￿￿￿￿: Operation start frequency

￿￿￿￿

: Operation start frequency hysteresis

• Function

The Run/Stop of operation can be controlled simply with frequency setting signals.

[Parameter setting]

 

Title!

Function!

Adjustment range!

Default setting!

 

 

￿￿￿￿!

Operation starting frequency!

￿￿~￿￿!

￿￿￿!

 

 

￿￿￿￿!

Operation starting frequency hysteresis!

￿￿~￿￿￿ Hz!

￿￿￿!

 

 

 

 

 

 

 

F-13

Page 129
Image 129
Toshiba VF-AS1 instruction manual Operation frequency