LG Electronics C Series manual Drive Frequency Command Group

Chapter 9. Basic functions

zAnalog 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		Min/Max		Factory	Unit
						Value		Range		Defaults
Drive		0.0		[Frequency Command]	-		-		-		Hz
group
			Frq	[Frequency Mode]		2	0/8		0
I/O			I 1	[Filter time constant for V0	10		0/9999		10
group				input]
			I 2	[V0 input minimum voltage]	-		0/10		0		V
			I 3	[Frequency corresponding to	-		0/400		0.0		Hz
				I2]
			I 4	[V0 input max voltage]	-		0/10		10		V
			I 5	[Frequency corresponding to	-		0/400		60.0		Hz
				I4]

ƒSet Frq – [Frequency Mode] to 2.

ƒThe 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).

V0 input

Set freq

t

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	50Hz
I 5
I 3	10Hz
	2V	8V	V0 input
	I 2	I 4

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