Omron MX2

This warning indicates that the parameter set for the frequency upper limit (A061) is configured to a value higher than the inverter's maximum allowed frequency (A004). This inconsistent setting may lead to unexpected operational limits or prevent the drive from reaching its full potential.

This Modbus exception indicates that the master device has sent a function code that the inverter (slave) does not recognize or support. It means the Modbus request is invalid because it's asking the inverter to perform an operation it's not designed for, preventing the command from being executed.

This warning indicates that the parameter set for the frequency lower limit (A062) is configured to a value higher than the inverter's maximum allowed frequency (A004). This inconsistent setting creates a logical conflict in the drive's operational range.

This Modbus exception occurs when the master device attempts to read from or write to a data address (register or coil) that is beyond the inverter's valid address range or does not exist. This indicates an incorrect memory address in the Modbus request, which the inverter cannot fulfill.

This Modbus exception is returned when the master device sends a data value that is outside the permissible range or in an unacceptable format for the specified Modbus address. This means the value attempting to be written is invalid according to the parameter's constraints or data type, preventing a successful write operation.

This warning occurs if the frequency set for Multi-step speed reference 0 (A020) or the current output frequency (F001) is greater than the inverter's maximum allowed frequency (A004). This can cause the inverter to operate outside its designed limits or result in an unintended operational range.

This warning occurs if the frequency set for Multi-step speed reference 0 (A020) or the output frequency setting (F001) is higher than the configured frequency upper limit (A061). This creates a logical conflict in the drive's speed constraints, as a programmed speed is above the allowed maximum.

This Modbus exception occurs specifically when writing to a holding register if the data value is outside the parameter's permissible range. It's a more specific version of 'Illegal Data Value' (03 hex) for write operations to holding registers. The inverter rejects the write to prevent parameters from being set to an invalid state.

This Modbus exception indicates that the inverter cannot perform the requested function due to its current operating state or configuration. This includes attempts to change RUN-protected parameters during operation, issue an Enter command while the inverter is in RUN or trip status, write to soft-locked or password-protected registers, or modify fixed I/O terminal settings. It's a broad category of operational constraints.

This Modbus exception is returned when the master device attempts to write data to a register or coil that is configured as read-only by the inverter. The inverter rejects the command because it cannot modify the data at that address. This typically applies to monitor values or fixed system status indicators that are not user-editable.

This warning indicates that the frequency lower limit (A062) is set higher than the Multi-step speed reference 0 (A020) or the output frequency setting (F001). This creates a logical inconsistency where the minimum allowed frequency is greater than a programmed speed reference, potentially limiting operation.

This warning occurs when the inverter's starting frequency (b082) is set higher than the defined frequency upper limit (A061). This configuration is contradictory and may prevent the inverter from starting or operating as intended within its defined frequency limits.

This warning indicates that the inverter's starting frequency (b082) is set higher than the defined frequency lower limit (A062). While less critical than exceeding the upper limit, this can lead to unexpected motor behavior if the drive attempts to start below its commanded minimum frequency.

This warning indicates that the inverter's starting frequency (b082) is set higher than the Multi-step speed reference 0 (A020) or the output frequency setting (F001). This creates a logical conflict for initial motor speed settings, potentially causing the drive to jump to a higher speed than intended immediately after starting.

This warning occurs when the inverter's starting frequency (b082) is set higher than one or more of the defined multi-step speed references (A021-A035). This inconsistent parameter configuration may lead to unexpected speed behavior when switching between multi-step speeds, as the base speed is higher than a target speed.

This warning indicates that the inverter's starting frequency (b082) is set higher than the jogging frequency (A038). This inconsistency can cause an abrupt speed change when transitioning from a jog command or if jogging is initiated at startup, potentially leading to jerky motion or mechanical stress.

This warning indicates that Multi-step speed reference 0 (A020) or the output frequency (F001) is set to a value that falls within one of the defined 'jump frequencies' (A063/A065/A067) with its associated width (A064/A066/A068). Operating at such a speed can lead to mechanical resonance in the machine, causing vibration or instability.

This warning indicates that one or more of the multi-step speed references (A021-A035) are set to a value that conflicts with a defined jump frequency range (A063/A065/A067 ± A064/A066/A068). Operating at such a speed can cause mechanical resonance in the machine, potentially leading to damage or instability.

This warning occurs when the seventh point of the free setting V/f curve (b112), which also acts as the maximum frequency in this mode, is set higher than the frequency upper limit (A061). This creates an inconsistent operational boundary for V/f control, limiting the actual achievable frequency.

This warning indicates that the seventh point of the free setting V/f curve (b112) is set higher than the frequency lower limit (A062). This creates an inconsistent lower boundary for the V/f characteristic, potentially restricting the minimum V/f output.

This warning occurs when the seventh point of the free setting V/f curve (b112) is set higher than Multi-step speed reference 0 (A020) or the output frequency setting (F001). This creates a conflict where the V/f curve's maximum frequency is inconsistent with a programmed speed reference, potentially causing unintended speed limits.

For the second motor settings, this warning indicates that the frequency upper limit (A261) is set higher than the 2nd maximum frequency (A204). This inconsistent configuration for the alternative motor profile may prevent the second motor from operating at its intended maximum frequency.

For the second motor settings, this warning indicates that the frequency lower limit (A262) is set higher than the 2nd maximum frequency (A204). This creates an inconsistent lower boundary for the alternative motor profile, potentially restricting the minimum operating speed of the second motor.

For the second motor settings, this warning occurs if the Multi-step speed reference 0 (A220) or the output frequency (F001) is set higher than the 2nd maximum frequency (A204). This indicates an operational limit conflict for the alternative motor profile, potentially limiting the achievable speed of the second motor.

For the second motor settings, this warning occurs if the Multi-step speed reference 0 (A220) or output frequency setting (F001) is set higher than the 2nd frequency upper limit (A261). This creates a conflict in the speed constraints for the alternative motor profile, as a programmed speed is above the allowed maximum.

For the second motor settings, this warning indicates that the 2nd frequency lower limit (A262) is set higher than the 2nd Multi-step speed reference 0 (A220) or the output frequency setting (F001). This creates a logical inconsistency for the alternative motor profile's minimum speed, potentially restricting the operation of the second motor.

For the second motor settings, this warning occurs when the inverter's starting frequency (b082) is set higher than the 2nd frequency upper limit (A261). This inconsistent configuration may prevent the second motor from starting or operating as intended within its defined frequency limits.

For the second motor settings, this warning indicates that the inverter's starting frequency (b082) is set higher than the 2nd frequency lower limit (A262). This could lead to unexpected motor behavior if the second motor attempts to start below its commanded minimum frequency, potentially causing jerky motion.

For the second motor settings, this warning indicates that the inverter's starting frequency (b082) is set higher than the 2nd Multi-step speed reference 0 (A220) or the output frequency setting (F001). This creates a logical conflict for initial motor speed settings, potentially causing the drive to jump to a higher speed than intended immediately after starting the second motor.

For the second motor settings, this warning indicates that the 2nd Multi-step speed reference 0 (A220) or output frequency (F001) is set to a value that falls within one of the defined 'jump frequencies' (A063/A065/A067) with its associated width (A064/A066/A068). Operating at such a speed can lead to mechanical resonance or unstable operation for the second motor at that frequency.

For the second motor settings, this warning occurs when the seventh point of the free setting V/f curve (b112), which also acts as the maximum frequency in this mode, is set higher than the 2nd frequency upper limit (A261). This creates an inconsistent operational boundary for V/f control for the second motor, limiting the actual achievable frequency.

For the second motor settings, this warning indicates that the seventh point of the free setting V/f curve (b112) is set higher than the 2nd frequency lower limit (A262). This creates an inconsistent lower boundary for the V/f characteristic for the second motor, potentially restricting the minimum V/f output.

For the second motor settings, this warning occurs when the seventh point of the free setting V/f curve (b112) is set higher than the 2nd Multi-step speed reference 0 (A220) or the output frequency setting (F001). This creates a conflict where the V/f curve's maximum frequency is inconsistent with a programmed speed reference for the second motor, potentially causing unintended speed limits.

This fault indicates that the inverter detected an excessive current flow while the motor was operating at a constant speed. This can be caused by a short circuit in the motor output, a locked motor shaft, or a sudden heavy load on the motor, leading to inverter shutdown to prevent damage.

This fault occurs when a large current flows through the inverter while the motor operates at a constant speed, typically due to sudden load fluctuations or brake application. The inverter's protection circuit activates at approximately 200% of the rated output current, causing a trip to prevent damage to the inverter components.

This fault occurs when the inverter detects an overcurrent condition during the motor's deceleration phase. This typically happens when the motor is regenerating energy back into the drive too rapidly or encounters a sudden mechanical jam during slowing down, leading to an inverter trip.

This fault indicates an excessive current flow through the inverter during motor deceleration. Common causes include overly rapid deceleration settings, the application of mechanical brakes during deceleration, or high inertia loads. The inverter trips when the current exceeds roughly 200% of its rated output to safeguard its internal power circuitry.

This fault signifies an excessive current draw by the motor during its acceleration phase. Common causes include a short circuit in the motor wiring, the motor being mechanically locked, an overly aggressive acceleration time setting for the load, or insufficient motor parameters in the drive.

An overcurrent trip during motor acceleration signifies an excessive current draw, often caused by rapid acceleration times, a locked rotor condition, or improperly tuned torque boost parameters. The inverter detects this condition when output current reaches approximately 200% of its rated value, leading to a shutdown to protect the main power elements.

This fault indicates an overcurrent condition that occurred under operating circumstances other than constant speed, acceleration, or deceleration. This general overcurrent trip mechanism acts as a catch-all for various abnormal current events, protecting the inverter from sustained high current levels.

This overcurrent fault occurs due to conditions not directly tied to constant speed, acceleration, or deceleration, often observed during startup or when the motor is operating at 0 Hz with DC injection braking. It means the inverter's protection circuit was activated unexpectedly, typically around 200% of the rated output current, due to various external or tuning factors.

This fault occurs when the inverter's electronic thermal protection detects that the motor is operating under an excessive load, causing it to overheat. The inverter calculates the motor's thermal state based on current and time, tripping to prevent motor damage from prolonged overload.

This fault indicates that the motor is operating under an excessive load, causing the inverter's output current or its electronic thermal protection function to trip. It can also be triggered if the electronic thermal level (b012/b212) is set incorrectly, failing to adequately protect against motor burnout.

This fault indicates that the regenerative braking resistor has been overloaded, typically due to excessive or continuous energy dissipation from the motor. The inverter monitors the usage rate of the braking resistor (b090) and trips to prevent damage to the resistor and associated components.

This error occurs when the usage rate of the regenerative braking circuit exceeds the configured limit (b090), indicating that the braking resistor is being overstressed. This usually happens during frequent or prolonged deceleration cycles, or if the braking resistor's capacity is insufficient for the application's regenerative energy requirements, risking component damage.

This fault occurs when the DC bus voltage inside the inverter exceeds a predefined safe threshold. This usually happens during deceleration due to regenerative energy from the motor returning to the drive faster than it can be dissipated, or from an unstable input power supply.

An overvoltage fault occurs when the DC bus voltage between the P/+2 and N/- terminals exceeds a safe limit (typically 400V for 200V class or 800V for 400V class). This is often due to regenerative energy from the motor during deceleration, an excessively high incoming power supply voltage, or power supply fluctuations. Unresolved, it can damage the inverter's internal components.

This fault indicates a problem with the inverter's built-in EEPROM memory, often caused by electrical noise, power fluctuations, or excessive temperature. When this error occurs, the inverter trips and turns off its output to the motor to prevent further data corruption or erratic behavior.

This error indicates a problem with the inverter's built-in EEPROM, where parameters are stored. It can be caused by external electrical noise, abnormal temperature, or a corrupt memory block. This fault prevents the inverter from accepting reset commands and means stored parameters might be corrupted or unreadable, potentially leading to incorrect operation.

This fault occurs when the DC bus voltage inside the inverter drops below a critical threshold, indicating a control circuit fault or an unstable input power supply. This condition can also generate excessive motor heat or cause low torque, leading to an inverter trip to protect the system.

An undervoltage fault occurs when the DC bus voltage drops below a critical threshold (e.g., 173 VDC for 200V class or 345 VDC for 400V class), causing the control circuit to lose stable operation. This typically results from a low incoming power supply voltage or insufficient power supply capacity, which can lead to improper control and inverter shutdown.

This fault indicates a malfunction within the inverter's internal current detection system, which is crucial for accurate motor control and protection. When this error occurs, the inverter immediately shuts off its output to prevent uncontrolled operation or damage.

This fault indicates a malfunction within the inverter's current detection circuit. This is a critical internal hardware error, as the inverter relies on accurate current feedback for proper motor control and protection. If this error occurs, the inverter is typically faulty and unable to operate correctly, requiring internal repair or replacement.

This critical fault indicates a malfunction within the inverter's central processing unit (CPU). A CPU error implies a severe internal hardware or software issue, rendering the inverter unable to perform its control functions and resulting in an immediate trip and shutdown of the motor output.

A CPU error indicates a critical malfunction or internal error within the inverter's central processing unit. This can be caused by external electrical noise or a hardware defect on the CPU board. This fault typically renders the inverter inoperable and requires specialized attention, as it affects the core control logic.

This fault is triggered by an external safety or protection device connected to an intelligent input terminal configured as 'EXT' (option code 12). It signifies that an external condition requires the inverter to stop its output immediately, acting as a general-purpose interrupt to the drive's operation.

This fault is triggered by an external error signal received on the multi-function input terminal configured for 'External Trip' (EXT). It means a peripheral system connected to the inverter has detected a fault condition and signaled the inverter to shut down for safety or process control. The inverter displays this code but does not clear the trip status until reset.

This fault occurs when the Unattended Start Protection (USP) function is enabled and a Run command is present simultaneously with the application of power. It prevents the motor from unexpectedly starting upon power-up, requiring deliberate action to clear the fault and resume operation, enhancing safety.

The USP error occurs when the inverter's power recovery restart prevention function is activated. This specific fault triggers if the power supply is turned on while the RUN command is already active, preventing unintended motor restarts after a power interruption. It's a safety feature designed to ensure controlled startup.

This fault indicates a ground fault detection between the inverter's output terminals and earth ground, typically during power-up tests. The inverter's protection system detects current leakage paths, tripping to prevent electric shock and damage to the motor or inverter.

This fault is detected when a ground fault occurs between the inverter output unit and the motor, typically at power-on. The inverter's ground protection function activates to prevent electrical damage and ensure safety. This indicates an insulation breakdown or improper wiring in the motor circuit.

This fault is triggered when the inverter detects an excessive input voltage from the power supply, specifically during its idle (Stop) mode for a prolonged period (100 seconds). The inverter enters a fault state to protect its internal components from damage due to sustained high voltage.

This fault occurs when the incoming DC voltage between the P/+2 and N/- terminals remains in an overload state for 10 seconds (approx. 390 VDC for 200-V class or 780 VDC for 400-V class). This persistent high voltage indicates a problem with the power supply or an insufficient capacity to handle surges, causing the inverter to trip for protection.

This fault indicates an error in the inverter's cooling fin temperature detection system, such as a sensor disconnection or malfunction. This means the inverter cannot accurately monitor its internal temperature, posing a risk of overheating if left unaddressed, which could lead to critical component failure.

This fault indicates that the inverter's internal temperature has exceeded its safe operating threshold. The thermal sensor within the inverter module detects overheating of the power devices (IGBTs), causing the inverter to trip and shut down its output to prevent damage.

This fault occurs when the temperature in the inverter's main circuit exceeds a specified maximum value. This is typically caused by high ambient temperatures, insufficient ventilation, or clogged cooling fins, leading to thermal stress on internal components. Prolonged exposure to abnormal temperatures can significantly shorten the inverter's lifespan and lead to irreversible damage.

This fault occurs when there is a communication failure between the two internal CPUs within the inverter. Such a failure prevents coordinated operation and leads to an inverter trip, indicating a critical internal control issue.

This fault indicates a malfunction or error occurring in the inverter's built-in CPU during communications. This can be caused by significant electrical noise interference or an internal defect within the CPU or its communication hardware. It prevents the inverter from reliably communicating, potentially leading to erratic behavior or complete loss of control.

This fault indicates a problem with the inverter's main power circuit, where the power supply establishment is not properly recognized. This can be due to electrical noise, damage to main circuit elements, or issues with the DC bus voltage sensing.

This fault signifies a critical error occurring within the inverter's main circuit board. It can be caused by significant electrical noise interference or an internal hardware defect. This type of error impacts the fundamental power conversion and control functions of the inverter, typically rendering it inoperable and requiring internal repair or replacement.

This error is detected when excessive current flows through the analog current input terminal FI. This is typically caused by a short-circuit in the wiring connected to the FI terminal or incorrect wiring connections. If left unresolved, it can damage the inverter's control circuit board or lead to inaccurate frequency reference inputs.

This fault is triggered by an instantaneous overcurrent event in the IGBT (Insulated Gate Bipolar Transistor) output stage of the inverter. It signifies a rapid and severe current spike that could damage the IGBTs, causing the inverter to immediately shut off the output to protect these critical power devices, and preventing retry operations.

A driver error indicates a fault detected by the inverter's internal driver IC, protecting the main power elements (e.g., IGBTs). This can be triggered by severe momentary overcurrents (above 350% of rated), abnormal internal temperatures, or a drop in the main element drive power supply. This fault prevents inverter restart and usually requires internal component inspection.

This fault is activated when an external thermistor, connected to the inverter's input terminals [5] and [L], detects that the motor temperature has exceeded a safe limit (typically above 3 kΩ ±10%). The inverter trips and turns off its output to prevent motor overheating and damage.

This fault occurs when the inverter detects an abnormal temperature, indicated by a resistance value of 3 kΩ or more from an external thermistor connected to the TH input terminal. This suggests the motor temperature is too high, or there's a fault in the thermistor itself or its wiring, preventing accurate temperature monitoring.

This fault occurs during brake control operation if the inverter fails to receive the braking confirmation signal within the specified time (b124) after a brake release, or if the output current doesn't reach the brake release current (b126) during the brake wait time (b121). It indicates a problem with the brake's operation or its feedback to the inverter.

This error indicates that the inverter cannot verify the ON/OFF status of the external brake within the specified 'Brake Error Detection Time' (b124) after a brake release signal. It occurs when the brake control function (b120 = 01) is enabled, suggesting a problem with the brake itself, its confirmation signal, or incorrect timing settings, potentially leading to unsafe load control.

This fault is triggered when the Safe Stop function is activated, indicating that a safety-related input (GS1/GS2) has been interrupted or commanded, initiating an immediate and safe shutdown of the motor output. The inverter explicitly signals this state to ensure safety compliance and prevent unintended motion.

An emergency shutoff fault is triggered when the safety input terminals GS1/GS2 are activated, initiating a protective shutdown of the inverter. This is a critical safety response, indicating that an external emergency stop device or safety system has detected a hazardous condition and commanded the inverter to cease operation immediately.

This fault indicates an overload condition detected when the motor is operating at very low speeds. The inverter's protection mechanism trips to prevent motor damage that can occur when operating heavy loads at low frequencies, where cooling efficiency might be reduced and current demand is high.

This fault occurs when the inverter's built-in electronic thermal function detects an overload specifically during operation in an extremely low speed range (0.2 Hz or lower). This indicates that the motor is experiencing excessive load at low speeds, where cooling efficiency might be reduced, or that thermal parameters are not correctly configured for low-speed conditions.

This fault occurs when the communication between the inverter and its operator keypad (either integrated or external) fails. This interruption in communication prevents control and monitoring functions, causing the inverter to trip and display this error code.

This error occurs when communication is lost or interrupted between the inverter and the remote Digital Operator (Model: 3G3AX-OP01) for a specified duration (e.g., 5 seconds or longer). This indicates a problem with the connection cable or a fault in the Digital Operator itself, preventing the inverter from receiving commands or displaying status.

This fault occurs when a Modbus communication timeout happens, typically when the inverter does not receive data within the period specified by the communication watchdog timer (C077). This often indicates a break in network communication or incorrect settings, causing the inverter to trip if 'trip' is selected as the error behavior (C076=00).

A Modbus communication error occurs when a timeout is detected, typically if the 'Operation Selection on Communication Error' (C076) is set to 'Trip' (00). This indicates issues with communication speed, wiring integrity, or incorrect terminating resistor settings, preventing reliable data exchange between the inverter and a Modbus master.

This fault indicates an issue with the Drive Programming logic stored in the inverter's memory. It can be triggered if the program data is corrupted or if the PRG (Drive Programming start) terminal is activated without a valid program having been successfully downloaded or stored.

This error indicates a general program error within the DriveProgramming function. It means the inverter's internal sequence program has encountered an issue that prevents normal execution, possibly due to incorrect logic, syntax errors, or an unexpected state during program operation. This requires inspection of the program logic.

This fault occurs when the Drive Programming logic contains subroutines, if-statements, or for-next loops that are nested more than eight layers deep. This exceeds the inverter's processing capability for program complexity, causing a trip to prevent runtime errors and ensure system stability.

This fault indicates that the inverter encountered a command within the Drive Programming logic that it could not execute. This could be due to a syntax error, an unsupported instruction, or a logical conflict within the program, leading to an inverter trip.

These faults are generic user-defined trip codes triggered by specific conditions programmed within the Drive Programming application (E50 corresponds to user trip 0, E51 to user trip 1, etc.). They allow technicians to implement custom safety or operational interlocks, causing the inverter to trip and display a user-defined error code when those conditions are met.

This error indicates that a user-defined trip condition within the DriveProgramming logic has been met, causing the inverter to shut down. This is an intentional protective action programmed into the custom sequence, not an internal hardware fault. The specific cause is defined by the user's program logic.

These faults indicate errors related to an installed option board (E60 corresponds to option error 0, E61 to option error 1, etc.). The specific meaning of the error depends on the type of option board connected to the inverter, and they are reserved for diagnosing issues with the functionality or communication of these optional modules.

This fault indicates that an unrecoverable error has been detected in an option unit mounted on the inverter, such as an EtherCAT Communications Unit. This is a critical hardware or firmware error within the option unit itself, leading to a trip. The inverter cannot restore normal operation until the option unit fault is resolved.

This fault occurs when a communication timeout is detected between the inverter and its mounted option unit. This typically signifies a disconnection or a communication fault in the option unit, preventing data exchange. The inverter trips to indicate the loss of communication with the critical peripheral.

This fault indicates that the encoder connected for feedback has been disconnected, has a wiring error, or is of an unsupported type (e.g., not line driver output). Without valid encoder feedback, the inverter cannot perform accurate speed or position control, leading to a shutdown to prevent erratic motor behavior.

This fault is detected if the motor's actual rotation speed (feedback from the encoder) remains below the 'Starting Frequency' (b082) for a duration longer than the 'Encoder Disconnection Detection Time' (P077), while the output frequency is at or above 'Creep Speed Setting' (P015). This suggests a disconnection or malfunction of the encoder, or incorrect detection settings.

This fault is triggered when the motor speed deviates excessively from the commanded speed, exceeding a set threshold (P027), often in applications with encoder feedback. This indicates a loss of control, where the motor is either running too fast or too slow relative to the commanded reference, causing an inverter trip to prevent instability.

An overspeed error occurs when the motor's rotation speed, as detected by the encoder, exceeds the configured 'Overspeed Error Detection Level' (P026) multiplied by the maximum frequency. This can be caused by an incorrect P026 setting, improper encoder wiring, or actual runaway motor conditions. The inverter trips to prevent mechanical damage or unsafe operation.

This fault occurs in positioning applications when the current motor position exceeds the limits defined by the position range specification parameters (P072-P073). It indicates that the motor has moved beyond its allowed operational boundaries, causing the inverter to shut off its output to prevent mechanical damage.

This fault occurs during simple position control if the motor's current position deviates outside the range defined by the 'Position Limit Setting' (P072 and P073). This indicates that the motor has moved beyond its acceptable positional boundaries, usually due to incorrect settings, external forces, or a malfunction in the positioning system, requiring a shutdown for safety.

This error indicates an internal fault within the inverter's STO (Safe Torque Off) input terminal or its internal safety circuit. This is a critical internal diagnostic failure, signaling that the inverter's safety function itself is not operating normally. It does not depend on the GS input operation selection, implying a fundamental issue with the safety hardware.