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4. INPUT FUNCTION PARAMETERS
4-00
[VR] Input frequency bias setting
Factory setting
d 0.0
Setting range
d0. 0<->d 350Hz
unit
0.1Hz
4-01
[VR] Input frequency bias adjustment direction
Factory setting
d 0.0
Setting range
d 0
Positive direction
d 1
Negative direction
4-02
[VR] Input frequency gain setting
Factory setting
d 100
Setting range
d 1<->d200%
unit
1%
4-03
[VR] Negative bias 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 analog signals on digital operation keypad, please refer to the following examples. In addition, the negative
bias d2 in parameter 4-03 is not reversible refers to that the inverter remains operating in current direction instead of
reversing direction when frequency reaches the reverse frequency by adjusting the potentiometer on digital
operation keypad. 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 operation keypad), then the frequency can be set by using the potentiometer on
digital operation keypad.
Maximum frequency
0V 5V 10V
60Hz
30Hz
0Hz
Set value
1-00=60Hz Maximum frequency
4-00=0Hz [VR] Input frequency bias setting
4-01=0 [VR] Input frequency bias adjustment direction
4-02=100% [VR] Input frequency gain setting
4-03=0 [VR] Negative bias operation setting
1-00
Example 2:
This example is used in the industry when operating inverter. They hope the regulation resistance to be set is 10Hz
when it rotates to the leftmost point, that is, the min input of inverter 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 corresponding to 10~60Hz.
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.
