Mitsubishi Electronics FR-F700 Pr Pr Pr , C2902 to C7905, Pr to 134, 575 to 577 PID control

Pr. 125 Pr. 126 Pr. 241, C2(902) to C7(905)

Analog input frequency change and voltage, current input and frequency adjustment (calibration)

Pr.125 Terminal 2 frequency setting gain frequency Pr.126 Terminal 4 frequency setting gain frequency

Pr. 241 Analog input display unit switchover

C2(Pr.902) Terminal 2 frequency setting bias frequency

C3(Pr.902) Terminal 2 frequency setting bias	C4(Pr.903) Terminal 2 frequency setting gain
C5(Pr.904) Terminal 4 frequency setting bias frequency
C6(Pr.904) Terminal 4 frequency setting bias	C7(Pr.905) Terminal 4 frequency setting gain

￿You can set the magnitude (slope) of the output frequency as desired in relation to the frequency setting signal (0 to 5VDC, 0 to 10V or 4 to 20mA).

(1)Change the frequency at maximum analog input. (Pr.125, Pr.126)

Set a value in Pr. 125 (Pr. 126) when changing only the frequency setting (gain) of the maximum analog input power (current). (C2 (Pr. 902) to C7 (Pr. 905) setting need not be changed)

Initial value

frequency	60Hz
	(Hz)
Output					Gain	Pr.125
	Bias
C2
(Pr.902)		0		100%
		0	Frequency setting signal	5V
		0		10V
		C3	(Pr.902)	C4	(Pr.903)
Output frequency			Initial value
		60Hz
	(Hz)				Gain	Pr.126
	Bias
C5
(Pr.904)		0	20	100%
		0	4 Frequency setting signal 20mA
		C6	(Pr.904)	C7	(Pr.905)

(2)Analog input bias/gain calibration

(C2(Pr.902) to C7(Pr.905))

⋅The "bias" and "gain" functions are used to adjust the relationship between the input signal entered from outside the inverter to set the output frequency, e.g. 0 to 5V, 0 to 10V or 4 to 20mADC, and the output frequency.

⋅Set the bias frequency of terminal 2 input using C2(Pr. 902). (Factory-set to the frequency at 0V)

⋅Using Pr. 125 , set the output frequency relative to the frequency command voltage (current) set in Pr. 73 Analog input selection.

⋅Set the bias frequency of the terminal 4 input using C5(Pr. 904).

(Factory-set to the frequency at 4mA)

⋅Using Pr. 126 , set the output frequency relative to 20mA of the frequency command current (4 to 20mA).

(3)Analog input display unit changing (Pr. 241)

⋅You can change the analog input display unit (%/V/mA) for analog input bias/gain calibration.

Pr. 127 to 134, 575 to 577 PID control

Pr.127 PID control automatic switchover freqeuncy

Pr.128 PID action selection	Pr.129 PID proportional band
Pr.130 PID integral time	Pr.131 PID upper limit
Pr.132 PID lower limit	Pr.133 PID action set point
Pr.134 PID differential time	Pr.575 Output interruption detection time
Pr.576 Output interruption detection level	Pr.577 Output interruption release level

The inverter can be used to exercise process control, e.g. flow rate, air volume or pressure.

The terminal 2 input signal or parameter setting is used as a set point and the terminal 4 input signal used as a feedback value to constitute a feedback system for PID control.

⋅Pr.128 ="10, 11" (Deviation value signal input)

Inverter circuit

										Manipulated Motor
				Deviation signal		PID operation
Set point		+-								variable
						1					IM
				Terminal 1
					Kp	1+		+Td S
							Ti S
				0 to 10VDC
	To outside			(0 to 5V)
			Feedback signal (measured value)
		Kp: Proportionality constant				Ti: Integral time			S: Operator Td: Differential time

⋅Pr.128 ="20, 21" (Measured value input)

		Inverter circuit
Pr. 133 or							Manipulated Motor
			PID operation
terminal 2	+-						variable
Set point			1					IM
			Kp 1+	Ti	S	+Td S
0 to 5VDC
(0 to 10V, 4 to 20mA)		Terminal 4
		Feedback signal (measured value)			4 to 20mADC (0 to 5V, 0 to 10V)

	Kp: Proportionality constant Ti: Integral time S: Operator Td: Differential time
Pr.	Switch between the inverter operation and
	135 to 139, 159 commercial power-supply operation to use

Pr.135 Commercial power-supply switchover sequence output terminal selection

Pr.136 MC switchover interlock time Pr.137 Waiting time at a start Pr.138 Commercial power-supply operation switchover selection at an alarm Pr.139 Automatic switchover frequency between inverter and commercial power-supply operation Pr.159 Automatic switchover ON range between commercial power-supply and inverter operation

The complicated sequence circuit for commercial power supply- inverter switchover is built in the inverter. Hence, merely inputting the start, stop or automatic switchover selection signal facilitates the interlock operation of the switchover magnetic contactor.

Pr135 Setting	Description
0 (initial value)	Without commercial power-supply switchover sequence

1	With commercial power-supply switchover sequence
Sink logic type, Pr.185 = "7", Pr.192 = "17", Pr.193 = "18", Pr.194 = "19"
					MC2
							External
	MCCB	MC1			MC3		thermal relay
			R/L1	U
			S/L2	V				IM
			T/L3	W
			R1/L11
	Inverter start		S1/L21
	(forward rotation)				*1		MC
			STF	(MC1)IPF
	Inverter/commercial
							1
	power-supply switchover		CS
	Operation interlock		MRS			MC3
					*1		MC
			*3	(MC2)OL				*2
	External						2
			JOG(OH)					24VDC
	thermal reset
			RES			MC2
			SD		*1
				(MC3)FU			MC
	Frequency		10				3
	setting signal		2	SE
			5

Commercial power-supply switchover sequence connection diagram

*1 Take caution for the capacity of the sequence output terminal.

*2 When connecting a DC power supply, insert a protective diode.

*3 The used terminal changes depending on the setting of Pr. 180 to Pr. 189 (input terminal function selection).

Pr.	140 to 143		Refer to the section about Pr. 29 and
			other relevant parameters.
Pr.	144	Refer to the section about Pr. 37 and other
		relevant parameters.

39 Pr. indicates simple mode parameters and Pr. indicates extended parameters. When setting parameters, refer to the instruction manual (applied) and understand instructions.