F-14
6.7 Operation frequency

6.7.1 Start-up frequency and End frequency

 Start-up frequency

 Stop frequency

[Parameter setting]
Title Function Adjustment range Default setting
 Start-up frequency   [Hz] 
 Stop frequency   [Hz] 
Note) Set these parameters so that the start-up 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.

6.7.2 Operating by means of reference signals

 Run frequency

 Run frequency hysteresis

[Parameter setting]
Title Function Adjustm ent range Default setting
 Run frequency   
 Run frequency hysteresis   [Hz] 

6.7.3 0Hz dead band frequency

 0Hz dead band frequency

Function
The frequency set with the parameter  is put out immediately.
These parameters are used if the acceleration/deceleration time causes a delay in the response of
the starting torque. It is advisable to set these frequencies between 0.5 and 2 Hz (at a maximum
of 5 Hz). This setting reduces the slippage of motor below the rated value to prevent over-current.
If 0 speed torque is needed(pt = ,), set ,  at .
At startup: frequency set with  is put out immediately.
At sto
p
: The out
p
ut fre
q
uenc
y
dro
p
s to 0 Hz immediatel
y
b
y
the fre
q
uenc
y
set with
.
Function
The start and stop of the motor can be controlled simply by giving frequency setting signals.
Start-up frequency 
Stop frequency 
Output frequency [Hz]
[s]
The motor starts to accelerate when the
frequency setting signal reaches point B, while
it starts to decelerate and stop when the
frequency setting signal falls below point A.
0 A B 100 Frequency reference [%]
 

 

Output frequency [Hz]
Function
In order to fixe the motor axis by the control with a s ensor, you may set frequency
reference as 0[Hz] by the analog input etc.. But it may be set to 0[Hz] neither
by the drift nor offset. In such a case, this function sets f requency instructions to
0[Hz] certainly. When frequency reference is smaller than -set va lue,
fre
q
uenc
y
reference is set to 0
[
Hz
]
.