Cleveland Range inverter specification

Chapter 4 - Parameter Description [FU2]

FU2-40: Control Method Selection

This is to select the control method of inverter.

Setting Range		Description
Select	Display

the inverter. This ‘Set-point’ can be in the form of Speed, Temperature, Pressure, Flow level, etc. The ‘Set-point’ and the feedback signals are provided externally to the inverter analog input terminals V1, V2 or I. The inverter compares the signals in calculating ‘total-error’ which is reflected in the inverter output.

Please see FU2-50 to FU2-54 for more detail.

V/F	0	Volts/Hz Control
Slip compen	1	Slip compensation operation
PID	2	PID feedback operation

[V/F]: This parameter controls the voltage/frequency ratio constant. It is recommended to use the torque boost function when a greater starting torque is required.

Related Functions: FU2-26 ~ FU2-28 [Torque Boost]

Reference

Set-point (DRV-04)

Keypad-1		+	err
Keypad-2	I/O-12		-
V1	I/O-12		-
I	~
V1+I	I/O-14

Feedback

	DRV-01
	DRV-02
FU2-51		M
FU2-52		M
FU2-53	FU2-54
		Process
4 to 20mA or
	0 to 10 V	Transducer

[Slip compen]: This function is used to maintain constant motor speed. To keep the motor speed constant, the output frequency varies within the limit of slip frequency set in FU2-32 according to the load current. For example, when the motor speed decreases below the reference speed (frequency) due to a heavy load, the inverter increases the output frequency higher than the reference frequency to increase the motor speed. The inverter increases or decreases the output by delta frequency shown below.

Delta		Output current – No load
	=		×Rated Slip

Freq.		Rated current – No load

Output frequency = Reference freq. + Delta freq.

☞Note: Motor parameters must be set correctly for better performance of control.

Related Functions: FU2-30 ~ FU2-37 [Motor Parameters]

[PID]: For HVAC or Pump applications, the PID control can be used to adjust the actual output by comparing a feedback with a ‘Set-point’ given to

FU2-50

[PID Control Block Diagram]

☞Note: PID control can be bypassed to manual operation temporarily by defining one of the multifunction input terminals (P1~P3) to “Open-Loop”. The inverter will change to manual operation from PID control when this terminal is ON, and change back to PID control when this terminal is OFF.

Related Functions: DRV-04 [Frequency Mode]

I/O-01 to I/O-10 [Analog Signal Setting] I/O-12 to I/O-14 [Multi-Function Input] FU2-50 to FU2-54 [PID Feedback]

FU2-50: PID Feedback Signal Selection

FU2-51: P Gain for PID Control

FU2-52: I Gain for PID Control

FU2-53: D Gain for PID Control

FU2-54: Limit Frequency for PID Control

Select the feedback signal for PID control. This can be set one of ‘I’, ‘V1’, ‘V2’ according to the signal (current or voltage) and the terminal (V1 or V2).

inverter specifications

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Cleveland Range inverter manual Parameter Description FU2 FU2-40 Control Method Selection

Models: inverter