Mitsubishi Electric FR-F840-00170 User Manual (English)

Other manuals for Mitsubishi Electric FR-F840-00170

Questions and Answers:

E
Edward LeonardAug 5, 2025
How to fix incorrect motor speed on Mitsubishi Electric FR-F840-00170?
- S
  Steven BrownAug 5, 2025
  If the motor does not run at the correct speed, and there's a difference between the command speed and the actual speed, it could be due to noise affecting the speed command. Check that the speed command sent from the controller is correct and take EMC measures. Additionally, you can try setting Pr. 72 "PWM frequency selection" lower or adjusting the bias and gain (Pr. 125, Pr. 126, C2 to C7, C12 to C15) of the speed command again.
D
Daniel KennedyAug 9, 2025
What to do if Mitsubishi Electric FR-F840-00170 Inverter machine movement is unstable?
- K
  Kelly JohnsonAug 9, 2025
  If the machine movement is unstable, it could be due to a speed control gain that is not suitable for the machine. Adjust Pr. 820 and Pr. 821. Alternatively, the response might be slow because of the inverter's acceleration/deceleration time setting, so setting the optimum acceleration/deceleration time may help.
S
Susan FrancisAug 13, 2025
Why is my Mitsubishi Electric FR-F840-00170 Inverter motor vibrating?
- N
  nicholas85Aug 13, 2025
  If the motor or machine experiences hunting (vibration or acoustic noise), it may be due to a speed control gain that is too high. Try setting Pr. 820 “Speed control P gain 1” lower and Pr. 821 “Speed control integral time 1” higher. Another possible cause is a torque control gain that is too high; in this case, set Pr. 824 “Torque control P gain 1 (current loop proportional gain)” lower. Also, check the motor wiring to ensure it is correct.
M
Mark WhitneyAug 17, 2025
Why Mitsubishi Electric FR-F840-00170 speed does not accelerate?
- D
  Debbie DiazAug 17, 2025
  If the speed does not accelerate to the command speed, it could be due to torque shortage, causing the stall prevention operation level to activate. Try raising the stall prevention operation level. You could also increase the capacity or select PI control.
D
Daniel ZimmermanAug 21, 2025
Why does Mitsubishi Electric FR-F840-00170 Inverter motor speed fluctuate?
- J
  Jacob MitchellAug 21, 2025
  If the motor speed fluctuates, it could be because the speed command varies. Check that the speed command sent from the controller is correct and take EMC measures. You might also try setting Pr. 72 "PWM frequency selection" lower or setting Pr. 822 "Speed setting filter 1" higher. Another possibility is torque shortage, so raise the stall prevention operation level. Finally, the speed control gain might not be suitable for the machine, causing resonance, so adjust Pr. 820 "Speed control P gain 1" and Pr. 821 "Speed control integral time 1".
B
brett82Aug 26, 2025
What causes rotation ripple in Mitsubishi Electric FR-F840-00170 Inverter?
- S
  Steven RiceAug 26, 2025
  If rotation ripple occurs during low-speed operation, it could be that a high carrier frequency is affecting the motor rotation. Try setting Pr. 72 "PWM frequency selection" lower. Another cause could be that the speed control gain is too low, in which case you should set Pr. 820 "Speed control P gain 1" higher.
M
Matthew CombsAug 30, 2025
Why Mitsubishi Electric Inverter motor does not run at the correct speed?
- C
  Cody JohnsonAug 30, 2025
  The motor might not run at the correct speed because the speed command from the controller differs from the actual speed, potentially due to noise. To resolve this: * Verify that the speed command sent from the controller is correct, taking electromagnetic compatibility (EMC) measures if needed. * Try setting Pr.72 PWM frequency selection lower. Another cause could be a difference between the command speed and the speed recognized by the inverter. In this case, readjust the bias and gain of the speed command using Pr.125, Pr.126, C2 to C7, and C12 to C15.

Mitsubishi Electric FR-F840-00170 Specifications

General

Brand	Mitsubishi Electric
Model	FR-F840-00170
Category	Inverter
Language	English

Summary

Introduction

General remarks

Provides an overview of the inverter's features, abbreviations, and related manuals.

Product checking and accessories

Details on how to unpack and check the inverter model, accessories, and how to read the serial number.

Operation steps

Installation and wiring

Peripheral devices

Describes the inverter and its peripheral devices, including system configuration overview and tables of compatible devices.

Removal and reinstallation of the operation panel or the front covers

Provides step-by-step instructions for removing and reinstalling the operation panel and front covers of the inverter.

Installation of the inverter and enclosure design

Details the inverter installation environment, including standard specifications and measures against environmental factors.

Terminal connection diagrams

Illustrates terminal connection diagrams for CA type and FM type inverters, including FR-F800-E models.

Precautions for use of the inverter

Basic operation

Operation panel (FR-DU08)

Details the components of the operation panel (FR-DU08) and provides instructions for its mounting.

Basic operation of the operation panel

Changing the parameter setting value

Basic operation procedure (PU operation)

Basic operation procedure (External operation)

Parameters

Parameter List

Provides a comprehensive list of parameters, grouped by function, with details on their settings and refer to pages.

(E) Environment setting parameters

(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern

Details parameters for setting acceleration/deceleration time and patterns suitable for the application.

Setting the acceleration/deceleration time

Acceleration/deceleration pattern

Backlash measures (Pr. 29, Pr. 140 to Pr. 143)

(D) Operation command and frequency command

Covers parameters for selecting operation modes and controlling frequency commands from various sources.

Operation mode selection

Explains how to select the operation mode of the inverter among External, PU, combined, and Network modes.

Startup in Network operation mode at power-ON

Initial setting of operation via communication

Ethernet communication (FR-F800-E)

Details the initial settings and specifications for Ethernet communication, including SLMP and TCP/IP procedures.

Wiring and configuration of PU connector communication system

Wiring and configuration of RS-485 terminals

Initial settings and specifications of RS-485 communication

BACnet MS/TP protocol

Initial settings and specifications of Ethernet communication (FR-F800-E)

Details the initial settings and specifications for Ethernet communication, including IP address and subnet mask.

Ethernet communication network number (Pr. 1424), Ethernet communication station number (Pr. 1425)

CC-Link IE Field Network Basic (FR-F800-E)

Safety instructions

Electric Shock Prevention

Provides warnings and precautions related to electric shock prevention when handling the inverter.

Fire Prevention

Details precautions to prevent fire hazards related to inverter installation and operation.

Injury Prevention

Outlines precautions to prevent injuries during handling, wiring, and operation of the inverter.

Additional Instructions

Transportation and installation

Provides instructions for safely transporting and installing the inverter, including handling precautions and environmental conditions.

Test operation and adjustment

Emergency stop

Explains the provision of safety backup for emergency stops and corrective actions for breaker trips or protective function activation.

Protective functions

Electro-magnetic interference (EMI) and leakage currents

Discusses the causes and countermeasures for EMI and leakage currents generated by the inverter.

Power supply harmonics

Explains power supply harmonics and provides harmonic suppression guidelines.

Installation of a reactor

Power-OFF and magnetic contactor (MC)

Recommends providing an MC on the inverter input side for safety, maintenance, and to prevent accidents.

Countermeasures against deterioration of the 400 V class motor insulation

Checklist before starting operation

Provides a checklist of points to recheck before starting operation to prevent product damage or injury.

Failsafe system which uses the inverter

Explains the use of inverter status output signals to provide an interlock for detecting inverter failures.

Protective functions

Details various protective functions for the motor and inverter, including overload and overheat protection.

Motor overheat protection (electronic thermal O/L relay)

Explains how to set the current of the electronic thermal O/L relay to protect the motor from overheating.

Earth (ground) fault detection at start

Retry function

Emergency drive (Fire mode)

Stall prevention operation

Details the stall prevention operation function which monitors output current and changes output frequency.

Troubleshooting in the speed control

PID control

Causes and corrective actions

Error message

Lists error messages displayed on the operation panel, their descriptions, check points, and corrective actions.

Warning

Fault

Details faults that occur when a protective function activates, including operation panel indication, data code, and refer to pages.

Check first when you have a trouble

Motor does not start

Troubleshooting guide for when the motor does not start, covering possible causes and countermeasures.

Speed does not accelerate

Specifications

Inverter rating

Provides detailed specifications for the inverter rating, including applicable models, output capacity, and environmental conditions.

Motor rating

Lists motor specifications for various premium high-efficiency IPM motors, including MM-EFS and MM-THE4 series.

Appendix

Specification comparison between PM motor control and induction motor control

Parameters (functions) and instruction codes under different control methods

Lists parameters, functions, and instruction codes for different control methods (V/F, Flux, PM, Copy, Clear).

Ethernet communication parameters (functions) and instruction codes under different control methods

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Mitsubishi Electric FR-F840-00170 User Manual

Table of Contents

Other manuals for Mitsubishi Electric FR-F840-00170

Questions and Answers:

Mitsubishi Electric FR-F840-00170 Specifications

Summary

Introduction

General remarks

Product checking and accessories

Operation steps

Installation and wiring

Peripheral devices

Removal and reinstallation of the operation panel or the front covers

Installation of the inverter and enclosure design

Terminal connection diagrams

Precautions for use of the inverter

Basic operation

Operation panel (FR-DU08)

Basic operation of the operation panel

Changing the parameter setting value

Basic operation procedure (PU operation)

Basic operation procedure (External operation)

Parameters

Parameter List

(E) Environment setting parameters

(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern

Setting the acceleration/deceleration time

Acceleration/deceleration pattern

Backlash measures (Pr. 29, Pr. 140 to Pr. 143)

(D) Operation command and frequency command

Operation mode selection

Startup in Network operation mode at power-ON

Initial setting of operation via communication

Ethernet communication (FR-F800-E)

Wiring and configuration of PU connector communication system

Wiring and configuration of RS-485 terminals

Initial settings and specifications of RS-485 communication

BACnet MS/TP protocol

Initial settings and specifications of Ethernet communication (FR-F800-E)

Ethernet communication network number (Pr. 1424), Ethernet communication station number (Pr. 1425)

CC-Link IE Field Network Basic (FR-F800-E)

Safety instructions

Electric Shock Prevention

Fire Prevention

Injury Prevention

Additional Instructions

Transportation and installation

Test operation and adjustment

Emergency stop

Protective functions

Electro-magnetic interference (EMI) and leakage currents

Power supply harmonics

Installation of a reactor

Power-OFF and magnetic contactor (MC)

Countermeasures against deterioration of the 400 V class motor insulation

Checklist before starting operation

Failsafe system which uses the inverter

Protective functions

Motor overheat protection (electronic thermal O/L relay)

Earth (ground) fault detection at start

Retry function

Emergency drive (Fire mode)

Stall prevention operation

Troubleshooting in the speed control

PID control

Causes and corrective actions

Error message

Warning

Fault

Check first when you have a trouble

Motor does not start

Speed does not accelerate

Specifications

Inverter rating

Motor rating

Appendix

Specification comparison between PM motor control and induction motor control

Parameters (functions) and instruction codes under different control methods

Ethernet communication parameters (functions) and instruction codes under different control methods

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