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

Chapter 4 - Parameter Description [FU2]

FU2-40: Control Method Selection				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
This is to select the control method of inverter.				signals in calculating ‘total-error’ which is reflected
				in the inverter output.
				Please see FU2-50 to FU2-54 for more detail.
Setting Range			Description
Select	Display				DRV-01
V/F	0	Volts/Hz Control
				Reference	DRV-02
Slip compen	1	Slip compensation operation
PID	2	PID feedback operation		Set-point (DRV-04)

	Keypad-1		+	err	FU2-51		M
[V/F]: This parameter controls the					FU2-52
	Keypad-2	I/O-12		-		FU2-54
voltage/frequency ratio constant. It is	V1				FU2-53
	I	~					Process
recommended to use the torque boost function	V1+I	I/O-14
when a greater starting torque is required.					4 to 20mA or
Related Functions: FU2-26 ~ FU2-28 [Torque Boost]		Feedback				0 to 10 V	Transducer
					FU2-50

[Slip compen]: This function is used to maintain						[PID Control Block Diagram]
constant motor speed. To keep the motor speed					☞ Note: PID control can be bypassed to manual operation
constant, the output frequency varies within the
					temporarily by defining one of the multifunction input terminals
limit of slip frequency set in FU2-32 according to
					(P1~P3) to “Open-Loop”. The inverter will change to manual
the load current. For example, when the motor
					operation from PID control when this terminal is ON, and
speed decreases below the reference speed
					change back to PID control when this terminal is OFF.
(frequency) due to a heavy load, the inverter
increases the output frequency higher than the
					Related Functions: DRV-04 [Frequency Mode]
reference frequency to increase the motor speed.						I/O-01 to I/O-10 [Analog Signal Setting]
The inverter increases or decreases the output by						I/O-12 to I/O-14 [Multi-Function Input]
						FU2-50 to FU2-54 [PID Feedback]
delta frequency shown below.
	Delta		Output current – No load
		=		×Rated Slip	FU2-50: PID Feedback Signal Selection
	Freq.		Rated current – No load		FU2-51: P Gain for PID Control
					FU2-52: I Gain for PID Control
Output frequency = Reference freq. + Delta freq.
					FU2-53: D Gain for PID Control
☞ Note: Motor parameters must be set correctly for better					FU2-54: Limit Frequency for PID Control
	performance of control.
Related Functions: FU2-30 ~ FU2-37 [Motor Parameters]
[PID]: For HVAC or Pump applications, the PID					Select the feedback signal for PID control. This
					can be set one of ‘I’, ‘V1’, ‘V2’ according to the
control can be used to adjust the actual output by
					signal (current or voltage) and the terminal (V1 or
comparing a feedback with a ‘Set-point’ given to
					V2).

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