LG C Series - Manual (Page 61)

Chapter 9. Basic functions
z Analog Frequency setting via Potentiometer (V0) on the Keypad
Used to prevent fluctuations in analog input signals caused by noise.
Group LED Display Parameter Name
Set
Value
Min/Max
Range
Factory
Defaults
Unit
0.0 [Frequency Command] - - - Hz
Drive
group
Frq [Frequency Mode] 2 0/8 0
I 1
[Filter time constant for V0
input]
10 0/9999 10
I 2 [V0 input minimum voltage] - 0/10 0 V
I 3
[Frequency corresponding to
I2]
- 0/400 0.0 Hz
I 4 [V0 input max voltage] - 0/10 10 V
I/O
group
I 5
[Frequency corresponding to
I4]
- 0/400 60.0 Hz
ƒ Set Frq – [Frequency Mode] to 2.
ƒ The set frequency can be monitored in 0.0- [Frequency Command].

I 1: [Filtering time constant for V0 input]
Effective for eliminating noise in the frequency setting circuit.
Increase the filter time constant if steady operation cannot be performed due to noise. A larger
setting results in slower response (t gets longer).
t
Set freq
V0 input

I 2 - I 5: [Min/Max input voltage and corresponding frequency setting]
The corresponding frequency to V0 input voltage is settable.
Example: When setting I 2 - [V0 input minimum voltage] = 2V, I 3- [Frequency corresponding
to I 2] = 10Hz, I 4 - [V0 input max voltage] = 8V and I 5 - [Frequency corresponding to I 4] =
50Hz, the following figure is shown.
Freq.
setting
V0 input
I 2 I 4
I 3
I 5
2V 8V
10Hz
50Hz
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