Omron MX2 Series Type V2 Compact Inverter

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 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 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 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 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.

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 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 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 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.

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 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.

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 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.

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 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.

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 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 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 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 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 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.

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 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 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.

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 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 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.

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 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 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.

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 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.

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 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.