Mitsubishi Electric FR-E820-0330E

Questions and Answers

K
Kevin DominguezAug 14, 2025
Why does hunting (vibration or acoustic noise) occur in the motor or the machine of my Mitsubishi Electric FR-E820-0330E?
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  David StricklandAug 14, 2025
  Hunting in your Mitsubishi Electric Inverter's motor or machine can occur due to several reasons: * The speed control gain might be too high. Try setting Pr.820 lower and Pr.821 higher. * The torque control gain might be too high. Try setting Pr.824 Torque control P gain 1 (current loop proportional gain) lower. * The motor wiring might be incorrect. Verify the wiring.
M
Michael NelsonAug 17, 2025
What to do if motor speed fluctuates in Mitsubishi Electric Inverter?
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  William RamirezAug 17, 2025
  If the motor speed fluctuates with your Mitsubishi Electric Inverter, consider the following: * Check that the speed command sent from the controller is correct and take EMC measures. Also, try setting Pr.72 lower and Pr.822 Speed setting filter 1 higher. * Torque shortage can cause speed fluctuations. Raise the torque limit. * The speed control gain might not be suitable for the machine, potentially causing resonance. Adjust Pr.820 Speed control P gain 1 and Pr.821 Speed control integral time 1.
M
mariadavenportAug 21, 2025
Why Mitsubishi Electric FR-E820-0330E motor does not run at the correct speed?
- S
  Sheila KochAug 21, 2025
  If your Mitsubishi Electric Inverter motor isn't running at the correct speed, it could be due to: * The speed command from the controller differing from the actual speed, possibly affected by noise. Ensure the speed command is correct and implement EMC measures. You can also lower the setting of Pr.72 PWM frequency selection. * An incorrect setting for the number of encoder pulses. Verify the Pr.369 setting (under Vector control). * A difference between the command speed and the speed recognized by the inverter. Readjust the bias and gain (Pr.125, Pr.126, C2 (Pr.902) to C7 (Pr.905)) of the speed command. * Motor constant variations due to increased motor temperature. Enable online auto-tuning at startup by setting Pr.95 (Pr.574) = "1" (under Real sensorless vector control).
A
Alexander BrayAug 25, 2025
Why doesn't the speed accelerate to the command speed in my Mitsubishi Electric FR-E820-0330E?
- S
  Samantha GonzalezAug 25, 2025
  If the speed of your Mitsubishi Electric Inverter does not accelerate to the command speed, it may be due to: * Torque shortage or the torque limit operating. Try raising the torque limit or increasing the capacity. * Only P (proportional) control being performed. Speed deviation occurs under P control when the load is heavy, so select PI control.
B
bhernandezAug 28, 2025
What causes unstable machine movement with a Mitsubishi Electric FR-E820-0330E?
- M
  Michael SalasAug 28, 2025
  Unstable machine movement with a Mitsubishi Electric Inverter can be caused by: * Speed control gain that is not suitable for the machine. Adjust Pr.820 and Pr.821. * Slow response due to the inverter's acceleration/deceleration time setting. Set the optimum acceleration/deceleration time.
T
Tiffany GeorgeSep 1, 2025
Why is the acceleration/deceleration time different from the setting on my Mitsubishi Electric FR-E820-0330E Inverter?
- J
  Jacqueline FitzgeraldSep 1, 2025
  If the acceleration/deceleration time differs from the setting on your Mitsubishi Electric Inverter, it might be due to: * Torque shortage. Try raising the torque limit. * Load inertia being too high. Set acceleration/deceleration time suitable for the load.
N
Nathan LaneSep 5, 2025
How to resolve rotation ripple during low-speed operation of Mitsubishi Electric Inverter?
- J
  Justin RichmondSep 5, 2025
  To resolve rotation ripple during low-speed operation of your Mitsubishi Electric Inverter: * A high carrier frequency may be affecting the motor rotation. Try setting Pr.72 lower. * The speed control gain might be too low. Set Pr.820 higher.

Summary

CHAPTER 1 Introduction

1.1 Inverter model

Check the rating plate on the side of the product. Some characters in the model name indicate the specification as follows.

1.2 Operation steps

Select a method to give the frequency command from the list below, and refer to the specified page for its procedure.

CHAPTER 2 Basic Operation

2.1 Operation panel

Components of the operation panel

2.8 I;O terminal function assignment

Functions can be assigned to the external I/O terminals (physical terminals) or communication (virtual terminals) by setting parameters.

CHAPTER 3 Parameters

3.1 Parameter initial value groups

Initial values of parameters of the FR-E800 differ depending on the parameter initial value group.

3.2 Parameter list (by parameter number)

For simple variable-speed operation of the inverter, the initial values of the parameters may be used as they are.

CHAPTER 4 Control Method

4.1 Vector control and Real sensorless vector control

Vector control is one of the control techniques for driving an induction motor.

4.2 Changing the control method and mode

Set the control method and the control mode.

4.3 Selecting the Advanced magnetic flux vector control

To use the Advanced magnetic flux vector control, select the control method using Pr.800, and the motor type and specification using Pr.71, Pr.80, and Pr.81.

4.4 Selecting the PM sensorless vector control

The inverter enables highly efficient motor control and highly accurate motor speed control of a PM (permanent magnet embedded) motor.

CHAPTER 5 Speed Control

5.1 Setting procedure of Real sensorless vector control (speed control)

Operating procedure

5.2 Setting procedure of Vector control (speed control)

Operating procedure

5.3 Setting procedure of PM sensorless vector control (speed control)

This inverter is set for an induction motor in the initial setting.

5.4 Setting the torque limit level

Limit the output torque not to exceed the specified value.

5.5 Performing high-accuracy, fast-response control (gain adjustment for Real sensorless vector control, Vector control, and PM sensorless vector control)

Gain adjustment is useful for achieving optimum machine performance or improving unfavorable conditions.

5.8 Avoiding motor overrunning

CHAPTER 6 Torque Control

6.1 Torque control

This chapter explains the torque control under Real sensorless vector control or Vector control.

6.2 Setting procedure of Real sensorless vector control (torque control)

Operating procedure

6.3 Setting procedure for Vector control (torque control)

Operating procedure

6.4 Torque command

For torque control selection, the torque command source can be selected.

6.5 Speed limit

CHAPTER 7 Adjustment during Real sensorless vector control, Vector control, PM sensorless vector control

7.1 Speed detection filter

Set the time constant of primary delay filter for speed feedback signal.

7.3 Gain adjustment of current controllers for the d axis and the q axis

CHAPTER 8 (E) Environment Setting Parameters

8.2 Reset selection; disconnected PU detection; PU stop selection

The reset input acceptance, disconnected PU connector detection function, and PU stop function can be selected.

8.10 Parameter write selection

Whether to enable the parameter write or not can be selected.

CHAPTER 9 (F) Settings for Acceleration;Deceleration

9.1 Setting the acceleration and deceleration time

The following parameters are used to set motor acceleration/deceleration time.

9.6 Shortest acceleration;deceleration (automatic acceleration;deceleration)

CHAPTER 10 (D) Operation Command and Frequency Command

10.1 Operation mode selection

Select the operation mode of the inverter.

10.3 Start command source and frequency command source during communication operation

The start and frequency commands can be given via communication using the external signals.

CHAPTER 11 (H) Protective Function Parameters

11.1 Motor overheat protection (electronic thermal O;L relay)

Set the current of the electronic thermal relay function to protect the motor from overheating.

11.4 Inverter output fault detection enable;disable selection

11.6 I;O phase loss protection selection

11.7 Retry function

This function allows the inverter to reset itself and restart at activation of the protective function (fault indication).

11.8 Limiting the output frequency (maximum;minimum frequency)

Motor speed can be limited. Clamp the upper and lower limits of the output frequency.

11.10 Stall prevention operation

This function monitors the output current and automatically changes the output frequency to prevent the inverter from shutting off due to overcurrent, overvoltage, etc.

11.11 Load characteristics fault detection

11.12 Motor overspeeding detection

CHAPTER 12 (M) Item and Output Signal for Monitoring

12.2 Monitor item selection on operation panel or via communication

The monitor item to be displayed on the operation panel can be selected.

12.4 Adjustment of terminal FM and terminal AM

12.6 Output terminal function selection

12.8 Output current detection function

CHAPTER 13 (T) Multi-Function Input Terminal Parameters

13.1 Analog input selection

The functions to switch the analog input terminal specifications and forward/reverse rotation by the input signal polarity are selectable.

13.2 Analog input terminal (terminal 4) function assignment

13.4 Frequency setting voltage (current) bias and gain

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