Omron 3G3MX2-AB007-E MX2 Inverter – Variable Frequency Drive
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Product Information
The Omron 3G3MX2-AB007-E is an MX2 Inverter and variable frequency drive for controlling three-phase AC motors in industrial automation equipment. It accepts a single-phase 200-240 V AC supply and provides up to 240 V AC three-phase motor output. The drive offers a 0.75 kW Heavy Duty rating with 5 A continuous output current or a 1.1 kW Normal Duty rating with 6 A output current. Open-loop V/f and sensorless vector control support flexible motor speed and torque control, while the IP20 enclosure is intended for installation inside a suitable control cabinet or protected electrical enclosure.
For replacement commissioning, match the Omron MX2 3G3MX2-AB007-E electrical class and application rating, then transfer the correct drive parameters using the USB Mini-B connection and Omron CX-Drive software. CX-Drive supports PC configuration, monitoring, commissioning, backup and parameter transfer. The built-in RS-485 interface provides Modbus RTU communication, while EtherCAT, EtherNet/IP, DeviceNet, CompoNet and PROFIBUS-DP connectivity can be added with the corresponding option module. Check the installed communication module and restore the required settings before returning the spare to service.
The integrated operator keypad and seven-segment display support local parameter review, control and status checking. POWER, RUN and ALM/TRIP indicators show the drive supply, motor-output state and trip condition, while the PRG/Hz/A display indicates the selected display state, including program mode, frequency or output current. The inverter stores the six previous trips and displays error codes such as E01 overcurrent, E09 undervoltage, E30 driver board error and E81 RS-485 communication error. First-line checks should cover supply voltage, input and motor wiring, mechanical load, RS-485 connections and option-module seating; internal hardware faults may require drive repair or replacement.
Technical Specifications
| Manufacturer | Omron |
| Part number | 3G3MX2-AB007-E |
| Model/type | MX2 Inverter |
| Component type | Variable frequency drive |
| Product family | MX2 |
| Heavy Duty rated power | 0.75 kW |
| Normal Duty rated power | 1.1 kW |
| Input voltage | 200-240 V AC, single-phase |
| Input frequency | 50/60 ±5 Hz |
| Heavy Duty output current | 5 A |
| Normal Duty output current | 6 A |
| Maximum output voltage | Up to 240 V AC, three-phase |
| Control method | Open-loop V/f and sensorless vector control |
| Heavy Duty overload capacity | 150% for 60 seconds |
| Normal Duty overload capacity | 120% for 60 seconds |
| Protection rating | IP20 |
| Built-in communication interface | RS-485 via terminal block |
| Built-in communication protocol | Modbus RTU |
| RS-485 communication speed | Up to 115200 bit/s |
| Configuration interface | USB Mini-B |
| Optional fieldbus compatibility | EtherCAT, EtherNet/IP, DeviceNet, CompoNet and PROFIBUS-DP via optional modules |
| Lifecycle status | Active production |
Programming and Configuration
The USB Mini-B port connects the inverter directly to a PC running Omron CX-Drive software. This connection supports parameter configuration, online monitoring, commissioning and backup, providing a practical method for transferring settings to a replacement 3G3MX2-AB007-E.
Before commissioning a spare, transfer the correct parameter set and check the selected Heavy Duty or Normal Duty rating, motor-control method and communication settings. Local parameter review and control are also available through the integrated operator keypad and seven-segment display.
Communication and System Integration
The built-in RS-485 terminal interface supports Modbus RTU communication at speeds up to 115200 bit/s. This provides a direct connection method for networked drive control and PLC integration where the existing system uses Modbus RTU.
Optional communication modules extend the MX2 inverter to EtherCAT with 3G3AX-MX2-ECT, EtherNet/IP with 3G3AX-MX2-EIP, DeviceNet with 3G3AX-MX2-DRT, CompoNet with 3G3AX-MX2-CRT and PROFIBUS-DP with 3G3AX-MX2-PDR-E. The replacement must use the option module required by the machine network, with the module connector seated securely.
Diagnostics and Status Indication
The Omron MX2 inverter combines an integrated seven-segment LED display, operator keypad, status indicators, CX-Drive online diagnostics and a fault-history register for up to six previous trips. The display can show program mode, frequency or output current, while the ALM/TRIP indication identifies a fault or trip condition.
For troubleshooting, review the displayed error code and check the related supply, motor wiring, mechanical load, communication cable or option module. E01 through E05 relate to overcurrent or overload conditions, E07 to overvoltage, E09 to undervoltage, E14 to a ground fault, E60 to option-card communication and E81 to RS-485 communication. CPU, EEPROM and driver-board errors can indicate internal hardware problems requiring repair or drive replacement.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| POWER | Lit | Main input power or control power is supplied to the drive |
| RUN | Lit | The inverter is running or outputting voltage to the motor |
| ALM/TRIP | Lit or flashing | A fault or trip condition has occurred |
| PRG/Hz/A | Displayed | Indicates the selected display state, including program mode, frequency or output current |
Replacement and Spare Part Considerations
Confirm the exact part number 3G3MX2-AB007-E, the single-phase 200-240 V AC input class and the required Heavy Duty or Normal Duty rating before fitting a spare. Check that the replacement matches the installed motor application and that any fieldbus option module is compatible with the machine network.
A replacement drive requires parameter transfer or re-entry before operation. Use CX-Drive through USB Mini-B to restore the correct settings, then check the motor-control configuration, Modbus RTU parameters and option-module connection. For internal EEPROM, CPU or driver-board faults, a repaired or tested exchange drive can be more practical than field-level repair.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| E01 | Overcurrent during constant speed | Inverter output current exceeded the overcurrent threshold during constant-speed operation | Short circuit at the inverter output, motor overload or mechanical blockage | Check motor insulation and output wiring for short circuits, then reduce the load |
| E02 | Overcurrent during deceleration | Inverter output current exceeded the threshold while decelerating | Deceleration time is too short or load inertia is excessive | Increase the deceleration time and connect an external braking resistor if required |
| E03 | Overcurrent during acceleration | Inverter output current exceeded the threshold during acceleration | Acceleration time is too short, or the motor is locked or overloaded | Increase acceleration time and check motor sizing and mechanical load |
| E04 | Overcurrent during other conditions | Inverter output current exceeded the threshold during stopping or standby | Noise interference or an output short circuit | Check output wiring and apply appropriate noise suppression |
| E05 | Overload trip | The electronic thermal relay activated because of a sustained overload | Excessive mechanical load or motor torque demand beyond inverter capacity | Reduce motor load and verify motor thermal parameter settings |
| E07 | Overvoltage trip | The main DC bus voltage exceeded the maximum allowable threshold | Regenerative motor energy during deceleration or excessive supply voltage | Increase deceleration time and install a dynamic braking resistor unit if required |
| E08 | EEPROM memory error | An internal EEPROM read or write error occurred during power-up or parameter saving | Noise during a write operation or internal memory hardware degradation | Initialize the parameters and cycle power. If the fault persists, return the unit for repair or replace the drive |
| E09 | Undervoltage trip | The DC bus voltage fell below the minimum operating limit | Input supply voltage drop, instantaneous power failure or loose power wiring | Check AC supply voltage and all input wiring connections |
| E12 | External trip | A signal was received on an input terminal configured for the External Trip function | An external safety circuit or interlock fault was triggered | Check external devices connected to the multifunction input terminals |
| E14 | Ground fault trip | Current leakage was detected between an inverter output phase and ground | Motor insulation breakdown or a damaged motor power cable | Inspect motor insulation resistance with a megohmmeter and check the motor cable |
| E21 | CPU error | The main microcontroller malfunctioned or its watchdog timer tripped | Severe electrical noise or internal microcontroller failure | Cycle main power. If the fault immediately recurs, return the unit for repair or replace the drive |
| E30 | Driver board error | The internal gate-driver or power-module error circuit was triggered | Power-module failure or gate-driver board fault | Replace the drive unit because internal hardware failure is indicated |
| E60 | Option card communication error | Communication failed between the inverter main board and the fieldbus option cassette | Loose option-module connector or option-card hardware failure | Turn off power, reseat the option module securely and reapply power |
| E80 | Encoder pulse or signal error | The pulse input signal from the speed-feedback encoder was lost or open-circuit | Disconnected encoder wiring or faulty encoder hardware | Check PG encoder wiring and the pulse signal input |
| E81 | RS-485 communication error | A serial communication timeout, parity error or framing error occurred on the RS-485 port | Disconnected cable, baud-rate mismatch or communication-line noise | Check RS-485 wiring, termination resistors and communication parameter settings |
Frequently Asked Questions
What is the Omron 3G3MX2-AB007-E?
It is an Omron MX2 Inverter and variable frequency drive with a 0.75 kW Heavy Duty rating or a 1.1 kW Normal Duty rating. It accepts 200-240 V AC single-phase input and provides up to 240 V AC three-phase output.
Which software is used to configure the 3G3MX2-AB007-E?
Omron CX-Drive software is used through the drive's USB Mini-B connection for parameter configuration, monitoring, commissioning, backup and parameter transfer.
Does this MX2 inverter support Modbus RTU?
Yes. Modbus RTU is built in through an RS-485 terminal interface, with communication speeds up to 115200 bit/s.
Which option modules can be used for network integration?
The MX2 inverter supports EtherCAT with 3G3AX-MX2-ECT, EtherNet/IP with 3G3AX-MX2-EIP, DeviceNet with 3G3AX-MX2-DRT, CompoNet with 3G3AX-MX2-CRT and PROFIBUS-DP with 3G3AX-MX2-PDR-E.
What should be checked when replacing this Omron drive?
Check the exact part number, 200-240 V AC input class, Heavy Duty or Normal Duty rating, transferred parameters, motor-control settings, RS-485 configuration and installed option module before commissioning.
What does an E81 fault indicate?
E81 indicates an RS-485 communication error caused by a serial timeout, parity error or framing error. Check the RS-485 wiring, termination resistors and communication parameter settings.
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