Need help?Do you have a question about the Küenle KFU 2 Series and is the answer not in the manual?
Basic steps for mechanical and electrical installation of the frequency inverter.
Detailed description of all functions, parameters, and additional functions.
Supplements documentation for installation and commissioning, application-specific topics.
Information on installing and using additional or optional components.
Safety precautions during operation, risk of high voltage, hot surfaces, and improper handling.
Intended use, compliance with directives, CE marking, and UL label.
Guidelines for proper transportation and storage conditions to maintain device integrity.
Precautions for careful handling, avoiding mechanical stress, and electrostatic discharge.
Safety instructions before connection, discharging capacitors, and complying with standards.
Guidelines on power supply connection, restart behavior, and pre-commissioning checks.
Warnings against unauthorized interventions and specifying authorized repair personnel.
Details on the STO function, its limitations, and safety requirements for its use.
Details the components included in the delivery for specific models.
Lists the delivery scope for intermediate power range models.
Specifies the scope of delivery for higher power KFU 4 models.
Details the delivery contents for the next power range of KFU 4 inverters.
Outlines the scope of supply for the highest power KFU 4 models.
CE conformity, EMC directive, UL approval, ambient temperature, environmental class, and degree of protection.
Specifications for control terminals X210A, X210B, and relay output X10.
Technical specifications including output current, mains voltage, fuses, and dimensions.
Technical data for higher power KFU 2 models operating at 230 V.
Technical specifications for the upper power range of KFU 2 inverters at 230 V.
Technical data for the lower power range of KFU 4 inverters at 400 V.
Technical specifications for KFU 4 inverters in the mid-power range at 400 V.
Technical data for higher power KFU 4 inverters at 400 V.
Technical specifications for the upper power range of KFU 4 inverters at 400 V.
Technical data for the highest power KFU 4 inverters at 400 V.
Technical specifications for the very highest power KFU 4 inverters at 400 V.
Graphical representation of derating based on installation height, coolant temperature, and mains voltage.
Details mounting instructions and dimensions for KFU 2 and 401 inverters up to 3.0 kW.
Mounting instructions and dimensions for KFU 2/401 inverters from 4.0 kW to 15.0 kW.
Installation guidelines and dimensions for KFU 4 inverters in the 18.5 to 30.0 kW range.
Mechanical installation details and dimensions for KFU 4 inverters, 37.0 to 65.0 kW.
Installation and dimensioning specifications for the highest power KFU 4 inverters.
Measures for electromagnetic interference avoidance, equipotential bonding, and cable shielding.
Visual representation of mains connection, DC link, control, and motor connections.
Information on available hardware modules like control units and communication modules.
Guidelines for selecting conductor cross-sections based on current load and voltage drop.
Instructions for selecting mains fuses, cable cross-sections, and adhering to standards.
Recommendations for using shielded cables, connecting motors, and managing cable lengths.
Details mains and motor connection for KFU 2/401 up to 3.0 kW.
Information on configuring control and software functionality for reliable operation.
Requirements for an external DC 24 V power supply used for control terminals.
Details the connection and function of the freely programmable relay output.
Configuration of digital input for motor thermal switch evaluation.
Illustrates terminal logic and function assignments for standard configurations.
Table summarizing possible combinations of functions and control methods available.
Functions for variable-speed control of 3-phase machines in standard applications using V/f characteristic.
Extends sensorless control with functions for flow, pressure, level, or speed control.
Enables sensorless, field-oriented control of 3-phase machines for high drive dynamics.
Combines field-oriented control with a Technology Controller for advanced process control.
Adds torque-dependent control to field-oriented control for precise operation.
Provides speed-controlled, field-oriented control with speed sensor feedback for high performance.
Integrates Technology Controller with field-oriented control for process automation.
Offers torque-dependent field-oriented control for precise speed and torque management.
Field-oriented control for synchronous machines with resolver feedback for precise speed performance.
Combines field-oriented control with torque-dependent control for synchronous machines.
Description of the functions of the control unit keys for navigation and operation.
Overview of the control unit's menu navigation structure and key functions.
Explanation of how to access and navigate through the four main menu branches.
How to display and monitor various actual values of the frequency inverter.
Instructions for navigating, selecting, and editing parameters for configuration.
Functionality for copying parameter values between the control unit and frequency inverter.
Process of reading stored data from the control unit and handling initialization or errors.
Details the three main functions within the copy menu: Format, All, and Active.
How to select the data source (frequency inverter or control unit files) for copy operations.
Procedure for selecting the target location (data sets or files) for the copy operation.
Steps involved in transferring parameter settings and handling potential errors during the copy process.
Table listing error codes, meanings, and remedies for the copy function.
How to activate parameter transmission from the control unit to the frequency inverter.
Steps for activating parameter transmission via keyboard or communication module.
Procedure for transmitting files from the control unit to the frequency inverter.
How to reset the control unit to normal operation mode after parameter transmission.
Information on controlling the drive via the control unit, including necessary connections.
How to control motor speed and functions using the control unit and its keys.
Checks to perform before switching on mains voltage and the inverter's self-test procedure.
Guided commissioning process to set parameters relevant to the application.
Explains parameter Configuration 30's role in defining control inputs, outputs, and software functions.
How the data set change-over function allows selection of parameter storage sets.
How parameter Motor type 369 affects control functions and parameter verification.
Entry of motor data from the nameplate for accurate machine model calculation and plausibility checks.
Verification process for machine data and handling of warning/error messages.
Process for measuring and identifying further machine data for precise control.
Importance of checking further parameters for specific applications after guided commissioning.
Defines how output frequency changes after reference value changes, start, stop, or brake commands.
Parameterizing the multi-functional input MFI1 for reference value signals.
Procedure for terminating the guided commissioning process and inverter initialization.
How to select and display specific actual values on the control unit after commissioning.
Procedure for checking motor rotation direction and troubleshooting incorrect rotation.
Adapting inverters to applications requiring incremental speed sensors.
Connecting and configuring speed sensor 1, including operation modes and division marks.
Details on connecting and configuring speed sensor 2, which requires an expansion module.
Performing parameter setting and commissioning via communication interfaces.
Information on identifying the device type and fabrication data.
Details on modular hardware extensions and their designations.
Information on the firmware version, software key, and copyright.
How to set a password for protection against unauthorized access to parameters.
Defines the scope of functions available for parameterization.
Entering plant or machine designation via optional control software.
Explains Configuration 30's role in assigning functions to control inputs/outputs and software features.
Setting the display language for parameter descriptions.
Acknowledging fault messages and resetting to factory settings using parameters.
Setting motor parameters based on the rating plate for accurate machine model calculation.
Data not on rating plate, required for precise calculation in field-oriented control.
Measurement and optimization of stator resistance for asynchronous and synchronous motors.
Defines leakage inductivity ratio for optimizing field-oriented control systems.
Measure of motor flux, used for optimizing sensorless field-oriented control.
Factor accounting for rotor time constant variations due to temperature and current.
Improves control behavior for synchronous machines with high dynamic requirements.
Value between two motor phases, used for high dynamic control of synchronous machines.
Sets limits for Isq value to protect synchronous motors, taken from motor data sheet.
Reversing the motor's rotating direction via parameter or input signals.
Parameters used for internal calculation of motor data, requiring no setup.
Connecting and configuring speed sensor 1, including operation modes and division marks.
Selecting appropriate modes for speed sensor 1 based on sensor type and evaluation method.
Adjusting the number of speed sensor increments for application-specific speed range.
Setting parameters to define mechanical transmission ratio between sensor and motor shaft.
Explanation of sensor evaluation accuracy levels and types (single, double, quadruple).
Using parameter 389 to monitor drive via actual value 242.
Parameterizing factors for monitoring drive using actual values for volume flow and pressure.
Parameterizing machine start behavior based on control functions and methods.
Setting starting behavior modes for sensorless control, including magnetization and current impression.
Parameter for impressing starting current, ensuring sufficient torque for high start torque applications.
Setting a limit for output frequency, above which control method transitions occur.
Time delay for releasing the motor holding brake before starting the drive.
Regulation of flux and torque forming current components for field-oriented control upon startup.
Defining machine stopping behavior using parameter Operation mode 630 and logic signals.
Defining the frequency from which drive standstill is recognized for switch-off.
Time duration for maintaining current supply to the motor when stopped, considered in certain stopping behaviors.
Activating direct current braking for stopping behaviors and search run functions.
Function allowing drive start upon mains voltage application, with controller enabling and start command.
Synchronizing the drive to a rotating motor without overcurrent faults.
Defining positioning operations using reference or axle positioning modes.
Positioning based on a digital reference signal and positioning distance.
Positioning based on a speed sensor feedback and reference orientation.
Setting warning limits for short-term and long-term overload based on switching frequency.
Parameterizing warning limits for heat sink and inside temperatures to prevent fault switch-off.
Indicating controller interventions and their impact on operating behavior.
Compensating DC components in output current by setting a maximum output voltage limit.
Setting a maximum output frequency to prevent inverter switch-off with fault message.
Monitoring motor temperature and configuring behavior for warnings or delayed switch-off.
Monitoring for phase failures and configuring inverter/motor shutdown behavior.
Enabling automatic acknowledgment of specific faults and defining limits for this.
Defining the output frequency and speed setting range using minimum and maximum frequency parameters.
Limiting torque in machine model calculation using slip frequency parameter.
Setting percentage ranges for reference values used in scaling and frequency calculation.
Connecting various signal sources for defining the reference frequency.
Describes software switches for frequency reference value channel based on selected source.
Combining signal sources for definition of reference figures and facilitating application integration.
Describes software switches for the reference percentage value channel based on selected source.
Parameterizing fixed frequencies or percentages for configuration and function.
Defining reference values selected via fixed frequency change-over modes.
Function for manual setup and positioning, setting output signal frequency via FUN key.
Defining percentage reference values selected via fixed percentage change-over modes.
Determining how quickly the frequency value changes based on reference value changes or commands.
Scaling reference value change (in percent) for input functions, using acceleration/deceleration ramps.
Fading out reference frequencies to avoid resonance points and stationary operating points.
Configuring MFI1 as voltage, current, or digital input for various software functions.
Default configuration for analog reference value using voltage signal, with option for current signal.
Mapping analog input signals to reference frequency or percentage values via parameterization.
Mapping analog input signals to drive setting ranges using frequency or percentage limits.
Adapting analog input characteristic with sign change for reference value and tolerance band.
Setting time constant for averaging analog reference value input using a low-pass filter.
Selecting operation modes for monitoring analog input signals and defining warning/shutdown behavior.
Configuring MFO1 as digital, analog, or repetition frequency output.
Configuring MFO1A for pulse width modulated signal with adjustable voltage range.
Adjusting voltage range of output signal based on actual values and voltage parameters.
Using MFO1 as frequency output, assigning speed or frequency via parameter.
Corresponds repetition frequency mode to incremental sensor mapping, parameterizing division marks.
Linking digital outputs and relay output to various functions based on configuration.
Selecting signals for digital outputs and linking them with inverter functions.
Activating digital output when actual stator frequency exceeds a set frequency value.
Generating a signal when actual frequency or percentage value reaches the reference.
Output becomes active when flux formation is ended, influenced by starting behavior.
Activating a brake unit via digital output based on starting/stopping behavior and control commands.
Linking digital outputs to intelligent current limits and reducing power based on selected operation mode.
Controlling an external fan via digital output based on controller release or temperature.
Configuring logic signals for monitoring functions to combine warnings and enable control.
Setting logic signals for monitoring functions and enabling warnings based on limit switches or errors.
Assigning control signals to software functions, differing by configuration and operation mode.
Linking start parameters to digital inputs or internal logic signals for drive acceleration.
Controlling the drive using digital pulses for start, stop, and direction via specific signals.
Adapting monitoring functions via error/warning behavior and acknowledging faults.
Selecting time functions for time-control of digital signals using operation modes and time constants.
Monitoring motor temperature by linking digital input to operation mode for temperature measurement.
Functions for speed or torque-dependent control, monitoring transition between control systems.
Storing parameter values in four data sets and enabling change-over via logic signals.
Specifying reference figures via fixed frequencies or percentages and enabling change-over via logic signals.
Controlling motor speed via digital control signals or control unit keys.
Parameterizing motor potentiometer function via reference frequency or percentage sources.
Availability of Motorpoti (KP) function in reference frequency channel, controlled via KP500 keys.
How to control motor speed and functions using the control unit and its keys.
Using PWM or repetition frequency signals for reference value specification, evaluated via digital inputs.
Accelerates control behavior of current/voltage controllers by adjusting output voltage.
Setting current limits to avoid inadmissible load and prevent fault switch-off, optimizing overload reserve.
Monitoring DC link voltage and controlling it to a set limit, including power failure regulation.
PID controller behavior for process control like pressure, volume flow, or speed.
Additional functions supplementing V/f characteristic for sensorless control.
Compensating load-dependent speed difference without feedback, correcting stator frequency and speed.
Ensuring drive system is not overloaded by reducing load during acceleration.
Control functions based on cascade control and complex machine model calculation.
Inner control loop of field-oriented control, impressing motor current via flux and torque components.
Demands speed limitation in operating points without load moment by increasing speed to reference torque limits.
Limiting output signal of speed controller (torque-forming current component Isq) via various parameters.
Limiting output values by fixed value or linking to analog input via parameters.
Setting integrating portion of speed control for speed accuracy in synchronization modes.
Activating acceleration pre-control in speed-controlled configurations to reduce drive system reaction time.
Controlling flux-forming current component via field controller, optimizing parameters for machine model.
Limiting field controller output signal and integrating part via parameters.
Adapting output value to machine behavior in speed and field weakening areas, reducing flux.
Limiting controller output and integrating part to prevent control loop oscillations.
Reducing motor noise by changing switching frequency and adjusting output signal.
Setting switch-on temperature for heat sink fan and controlling external fan.
Connecting digital controller inputs for drive control and enabling output stage.
Connecting external brake resistor and setting trigger threshold for brake chopper activation.
Values needed for dimensioning brake resistors, including peak braking power and operation time.
Protecting motors against overload and short-circuits, with options for warning or immediate disconnection.
Continuous monitoring of load behavior and connection between machine and load via V-belt system.
Function for adapted implementation of generator energy into heat for dynamic speed changes.
Measuring motor temperature and adjusting parameters for precise machine model calculation.
Monitoring speed sensor signals for faulty behavior and affecting fault switch-off.
Superimposing a triangle-shaped frequency signal for traverse function with acceleration/deceleration times.
Displaying actual value parameters like DC link voltage, modulation, and frequency.
Extended diagnosis of digital inputs STOA and STOB for safety function STO.
Reading control variables and actual values of the machine or system for diagnosis.
Storing various actual values for operating behavior assessment and maintenance.
Calculating actual system figures based on parameterized system data and electrical variables.
Monitoring the drive via actual value 242, calculated from actual frequency and system value factor.
Parameterizing factors for monitoring drive using actual values for volume flow and pressure.
Storing last 16 fault messages chronologically and showing the total number of errors.
Detailed explanation of error codes, meanings, and remedies for various fault conditions.
Documents operational behavior during last four faults for troubleshooting.
Using green and red LEDs and control unit messages (RUN, WARN, FAULT) to display operational status.
Checking digital input/output signals and their assignment to software functions during commissioning.
Establishing active control functions and displaying controller codes based on sums of individual codes.
Displaying current warnings via status messages and linking them to application-specific configurations.
Listing actual values of the machine, frequency inverter, and system with units and display ranges.
Comprehensive list of all parameters, structured by menu branches and numerical order.
To Next Page
General