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4 Input Function Parameters
4-00
VR Analogue input frequency bias
Factory setting
d 0.0
Setting range
d 0.00<->d350.0Hz
unit
0.1Hz
4-01
VR Bias adjustment direction
Factory setting
d 0
Setting range
d 0
positive direction
d 1
negative direction
4-02
VR Input frequency increase setting
Factory setting
d 100
Setting range
d 1<->d200%
unit
1%
4-03
VR Negative pressure operation setting
Factory setting
d 0
Setting range
d 0
no negative bias
d 1
reversible negative bias
d 2
not reversible negative bias
The parameters above is used for functions from 4-00 to 4-03, all of which set applied parameter
by setting and adjusting outside voltage/current signals, please refer to the following examples. In
addition, the negative bias d2 in parameter 4-03 is not reversible refers to that the drive remains
operating in current direction instead of reversing direction when frequency reaches the reverse
frequency by adjusting the potentiometer on digital manipulator. But the rotating direction can be
switched over by button or outside terminal, in order to adjust the motor rotating direction.
Example 1:
This is the most frequently used adjustment method in the industry. The user only need to set the
parameter 2-00 or 2-01 to 3( controlled by VR on digital manipulator), then the frequency can be
set by using the potentiometer on digital manipulator.
Example 2:
This example is used in the industry when operating AC motor drive. They hope the regulation
resistance to be set is 10Hz when it rotates to the leftmost point, that is, the min input of AC motor
drive must be 10Hz when starting, and the other frequency then be adjusted by the industry itself.
The diagram shows that at this time the relationship between VR and the set frequency has
changed from 0
～
10V corresponding to 0
～
60Hz into 0
～
8.33V. Therefore, the central point of the
regulation resistance becomes 40Hz and becomes 60Hz in the posterior segment of the regulation
resistance. In order to make the posterior segment of the regulation resistance can be operated,
please refer to example 3:
Max operation frequency
Max operation frequency
Bias adjustment
Bias direction adjustment
Gain adjustment
Negative bias operation setting
Set value
