LG Electronics C Series manual Monitoring Operating status monitoring

Chapter 11. Monitoring

11.Monitoring

11.1Operating status monitoring

zOutput current

	Group	LED	Description	Set	Min/Max	Factory	Unit
		Display		value	range	default
Drive		CUr	Output current	-
group

ƒInverter output current can be monitored in Cur.

zMotor RPM

Group	LED	Description	Set	Min/Max	Factory	Unit
	Display		value	range	default

Drive	rPM		[Motor RPM]			-
group
Function	H31		[Number of motor poles]		-		2/12	4
group 2
	H40	[Control mode select]			-		0/2	0
	H74		[Gain for Motor	rpm	-		1/1000	100	%
			display]

ƒMotor rpm can be monitored in rPM.

When H40 is set to 0 {V/F control} or 1 {PID control}, the Inverter output frequency (f) is displayed in RPM using the formula below. Motor slip is not considered.

⎛	120	⋅ f ⎞			H 74
RPM = ⎜			⎟	⋅
	H	31			100
⎝			⎠

H31: Enter the number of rated motor poles on the nameplate.

H74: This parameter is used to change the motor speed display to rotating speed (r/min) or mechanical speed (m/mi).

zInverter DC Link Voltage

	Group	LED	Parameter Name			Set	Min/Max	Factory	Unit
		Display				value	range	default
Drive		dCL	[Inverter	DC	Link	-
group			Voltage]

ƒInverter DC link voltage can be monitored in dCL.

2 times the value of input voltage is displayed while motor is at a stop.

It is the voltage detected between P1 and N terminal of power terminal.

100