LG Electronics SV-iC5 Series manual Monitoring, Rpm = , f , 11-1

11. Monitoring

11.Monitoring

11.1Operating status monitoring Output current

Group	LED Display	Description		Set		Min/Max		Factory		Unit
				value		range		default
Drive group	CUr	Output current		-
Inverter output current can be monitored in Cur.
Motor RPM
Group	LED Display	Description		Set		Min/Max		Factory		Unit
				value		range		default
Drive group	rPM	[Motor RPM]		-
Function	H31	[Number of motor poles]	-		2/12		4
group 2
	H40	[Control mode select]	-		0/2		0
	H74	[Gain for Motor rpm display]	-		1/1000		100		%

Motor 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).

Inverter DC Link Voltage

Group	LED Display		Parameter Name	Set	Min/Max	Factory	Unit
				value	range	default
Drive group	dCL		[Inverter DC Link Voltage]	-
Inverter 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.
		11-1				SV-iC5