To Next PageTo Next PageHow to stabilize machine movement with Mitsubishi Electric FR-E820-0008 Inverter?
Unstable machine movement when using a Mitsubishi Electric Inverter can stem from a couple of issues. First, the speed control gain might not be suitable for the machine; try adjusting Pr.820 and Pr.821. Second, the response might be slow due to the inverter's acceleration/deceleration time setting; setting the optimum acceleration/deceleration time may help.
What causes rotation ripple in Mitsubishi Electric Inverter at low speed?
Rotation ripple during low-speed operation with a Mitsubishi Electric Inverter can be caused by a high carrier frequency affecting the motor rotation. Try setting Pr.72 lower. Alternatively, the speed control gain might be too low; in this case, set Pr.820 higher.
Why does hunting (vibration or acoustic noise) occur in the motor or the machine of my Mitsubishi Electric Inverter?
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.
What to do if motor speed fluctuates in Mitsubishi Electric FR-E820-0008 Inverter?
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.
Why Mitsubishi Electric FR-E820-0008 Inverter motor does not run at the correct speed?
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).
General| Series | FR-E800 |
|---|---|
| Model | FR-E820-0008 |
| Input Voltage | 200-240V AC |
| Frequency | 50/60 Hz |
| Overload Capacity | 150% for 60 seconds |
| Cooling Method | Fan Cooling |
| Enclosure Rating | IP20 |
| Output Voltage | 200-240V AC |
| Phase | 3-phase |
| Control Method | V/F control |
| Protection Features | Overcurrent, overvoltage, undervoltage, overload, overheating, short circuit, ground fault |
| Ambient Temperature | -10 to +50°C (14 to 122°F) |
| Storage Temperature | -20 to +65°C (-4 to 149°F) |
| Humidity | 95% RH or less (non-condensing) |
| Altitude | Up to 1000 m |
| Vibration | 5.9 m/s² |
Details the inverter model name structure, including voltage class, phases, capacity, and communication specifications.
Describes the overall sequence of inverter operation from installation to basic steps, covering start and frequency commands.
Lists related manuals and their corresponding manual numbers for the FR-E800 inverter series.
Details the components of the standard and Ethernet model operation panels, including monitors, LEDs, and keys.
Explains how to monitor output current, output voltage, and display the set frequency.
Explains how to set the operation mode suitable for start and speed command combinations using Pr.79.
Lists and explains frequently used parameters grouped as simple mode parameters.
Explains basic operation procedures when giving frequency commands from the PU operation panel.
Explains basic operation procedures when giving frequency commands from external terminals.
Explains basic operation procedures for JOG operation using external signals or the operation panel.
Explains how functions can be assigned to external I/O terminals or communication by setting parameters.
Explains the division of FR-E800 inverters into groups and the initial values of parameters based on these groups.
Provides a comprehensive list of parameters, their functions, setting ranges, and refer to page numbers.
Explains how to switch the parameter identification number shown on the PU from a parameter number to a function group number.
Lists parameters by function group number for easy identification of related parameters.
Explains Vector control and Real sensorless vector control, including their fundamental equivalent circuits.
Details how to set the control method (V/F, vector, etc.) and control mode (speed, torque, position).
Explains how to select the Advanced magnetic flux vector control and its operating procedure.
Explains how to initialize parameters required for PM sensorless vector control and its operating procedure.
Provides a step-by-step guide for setting Real sensorless vector control for speed control.
Explains the procedure for setting Vector control for speed control.
Details the procedure for setting PM sensorless vector control for speed control.
Explains how to limit the output torque to not exceed a specified value, including setting torque limit levels.
Explains how to adjust gain for optimum machine performance and improve unfavorable conditions.
Explains how to select speed feed forward control or model adaptive speed control using parameter settings.
Explains the torque bias function to make starting torque start-up faster.
Explains how to avoid motor overrunning due to excessive load torque or errors in encoder pulse settings.
Provides troubleshooting steps for common issues encountered in speed control.
Explains torque control under Real sensorless vector control or Vector control.
Details the procedure for setting Real sensorless vector control for torque control.
Explains the procedure for setting Vector control for torque control.
Explains how to select the torque command source.
Explains how to limit the output torque to prevent overspeeding.
Provides guidance on adjusting gain for optimum machine performance or improving unfavorable conditions.
Offers solutions for common problems encountered in torque control.
Explains the basic principles of position control, including speed command calculation and simple positioning.
Details the steps for setting Vector control for position control.
Explains how to set positioning parameters and perform positioning operation by selecting point tables.
Explains how to monitor various pulses, such as position command and current position.
Explains how to set the gear ratio between the machine gear and motor gear.
Details parameters for adjusting position control, such as in-position width and excessive level error.
Explains how to hold the current position data at output shutoff for seamless restart.
Provides guidance on adjusting gain for optimum machine performance and improving unfavorable conditions.
Offers solutions for common problems encountered in position control.
Explains how to set the time constant of the primary delay filter for speed feedback signal.
Explains how to lower the excitation ratio to enhance efficiency for light loads and reduce motor magnetic noise.
Explains how to adjust the gain of the current controllers for the d axis and the q axis.
Explains how to set the time for the inverter.
Details how to select reset input acceptance, disconnected PU connector detection, and PU stop function.
Explains how to select the display language of the parameter unit.
Explains how to turn the key sound and buzzer of the LCD operation panel or parameter unit ON/OFF.
Explains how to adjust the contrast of the LCD display on the LCD operation panel or the parameter unit.
Explains how to enable frequency setting without pressing the SET key and how to disable key operations.
Explains how to set the frequency increment amount when changing the set frequency with the setting dial.
Explains how to select the rotation direction of the motor when the RUN key on the operation panel is pressed.
Explains how to select two rating types of different rated current and permissible load.
Explains how to enable or disable parameter writing to prevent rewriting by misoperation.
Explains how to register a 4-digit password to restrict access to parameters.
Explains the use of free parameters for various purposes.
Explains how to change settings of multiple parameters automatically.
Explains how to select a group of parameters to be displayed on the operation panel.
Explains how to change the PWM carrier frequency and enable Soft-PWM control.
Explains how to diagnose the deterioration degree of inverter parts.
Explains how the Maintenance timer (Y95) signal is output when the cumulative energization time reaches the set period.
Explains how the output current average value and maintenance timer value are output to the Current average monitor (Y93) signal.
Explains how to set the motor acceleration/deceleration time and the parameters used for it.
Explains how to set the acceleration/deceleration pattern according to the application.
Explains how to use contact signals to perform continuous variable speed operation.
Explains how to set the starting frequency and hold the set starting frequency for a certain period.
Explains how to set the frequency where the PM motor starts running.
Explains how to operate the inverter with the same conditions as when the appropriate value is set to each parameter.
Explains how to select the operation mode of the inverter among PU, External, Network, and combined modes.
Explains how to start up the inverter in the Network operation mode after power failure or power ON.
Explains how to give start and frequency commands via communication using external signals.
Explains how to prevent reverse rotation fault resulting from incorrect input of the start signal.
Explains how to set the frequency and acceleration/deceleration time for JOG operation.
Explains how to change pre-set operation speeds with terminals.
Explains how to set the current of the electronic thermal relay function to protect the motor from overheating.
Explains how to control the cooling fan.
Explains how to select whether to make earth (ground) fault detection at start.
Explains how to detect faults on the output side (load side) of the inverter.
Explains how to initiate a fault (protective function) by setting the parameter.
Explains how to disable the output phase loss protection function, which stops the inverter output if one of the three phases is lost.
Explains how the inverter can reset itself and restart at activation of the protective function.
Explains how to limit the output frequency to clamp the upper and lower limits.
Explains how to jump resonant frequencies attributable to the natural frequency of a mechanical system.
Explains how to monitor output current and automatically change output frequency to prevent the inverter from shutting off.
Explains how to monitor load operation by storing speed/torque relationship to detect mechanical faults or for maintenance.
Explains how overspeed occurrence (E.OS) is activated when motor speed exceeds overspeed detection level.
Explains how to display the motor speed or machine speed instead of frequency.
Explains how to select the monitor item to be displayed on the operation panel or via communication.
Explains how to select the type of monitor to be output through terminal FM or terminal AM.
Explains how to adjust (calibrate) terminal FM and terminal AM to full-scale deflection.
Explains how to monitor the energy saving effect by use of the inverter from the power consumption estimated value.
Explains how to change the functions of the open collector output terminals and relay output terminals.
Explains how the relative signal is output if the inverter output frequency reaches a specific value.
Explains how the relative signal is output via an output terminal if the inverter output current reaches a specific value.
Explains how the relative signal is output if the motor torque reaches a specific value.
Explains how the signal can be turned ON or OFF via the output terminal on the inverter as if the terminal is the remote output terminal for a programmable controller.
Explains how to select the analog input terminal specifications and forward/reverse rotation by the input signal polarity.
Explains how to set the analog input terminal 4 function.
Explains how the response level and stability of frequency command / torque command using the analog input signal can be adjusted.
Explains how the magnitude (slope) of the output frequency can be set as desired in relation to the frequency setting signal.
Explains how the magnitude (slope) of the torque can be set as desired in relation to the torque setting signal.
Explains how to select or change the input terminal functions.
Explains how the inverter output can be shut off with the MRS signal.
Explains how the second function can be selected using the RT signal.
Explains how to select the stopping method (deceleration stop or coasting) at turn-OFF of the start signal.
Explains how to select the applied motor type to set the thermal characteristic appropriate for the motor.
Explains how to enable the optimal operation of a motor by performing offline auto tuning.
Explains how to perform offline auto tuning for PM motors to set motor constants.
Explains how to perform online auto tuning at startup to retain favorable torque accuracy.
Explains how to set parameters for a motor with an encoder.
Explains how signal loss detection (E.ECT) is activated to shut off the inverter output when the encoder signal is lost.
Explains how this function outputs operation timing signals of the mechanical brake.
Explains how to ensure accurate positioning at the upper limit by closing the mechanical brake.
Explains the traverse operation, which oscillates the frequency at a constant cycle.
Explains process control such as flow rate, air volume, or pressure.
Explains how to adjust the display unit of parameters and monitor items related to PID control.
Explains how PID control is performed using detected dancer roll position as feedback.
Explains how the inverter can be restarted without stopping the motor operation in the following situations: when an instantaneous power failure occurs, or when the motor is coasting at start.
Explains how the inverter can be restarted without stopping the motor operation in the following situations: when an instantaneous power failure occurs, or when the motor is coasting at start.
Explains how to improve the accuracy of the frequency search, which is used to detect the motor speed for automatic restart.
Explains the function to decelerate the motor to a stop when an instantaneous power failure or undervoltage occurs.
Explains how the inverter can be run in accordance with a sequence program.
Explains how the operating status of the inverter can be traced and temporarily stored.
Explains how to set the torque boost value to compensate for voltage drop in the low-frequency range.
Explains how to adjust the inverter outputs (voltage, frequency) to match the motor rating.
Explains how to select optimal output characteristics for application or load characteristics.
Explains how the inverter automatically performs energy saving operation without detailed parameter settings.
Explains how to adjust the slip amount to keep the rotations per minute equivalent to those of the SF-JR for power consumption reduction.
Explains how to adjust braking torque and timing, and other functions.
Explains how to select the stopping method (deceleration stop or coasting) at turn-OFF of the start signal.
Explains how to increase the usage rate of the regenerative brake by using the optional high-duty brake resistor or brake unit.
Explains how the regenerative status can be detected and avoided by raising the frequency.
Explains how to increase the loss in the motor by increasing the magnetic flux during deceleration.
Explains how the slip of the motor is estimated from the inverter output current to maintain the rotation of the motor constant.
Explains how to control the inverter output frequency so that the motor speed is constant to the load variation by detecting the motor speed with the speed detector (encoder).
Explains how to give droop characteristics to the speed by balancing the load in proportion with the load torque.
Explains how to suppress vibration caused by mechanical resonance by reducing fluctuation of the output current (torque).
Explains how to initialize the parameter or clear all parameters.
Explains how to display parameters changed from their initial values.
Explains how to clear the fault history.
Provides reference information for use of the product, including replacement of the FR-E700 series.
Compares the specifications between PM sensorless vector control and induction motor control.
Lists parameters, functions, and instruction codes under different control methods for easy reference.
Explains how to check the SERIAL number indicated on the inverter rating plate or packaging.
