Lenze E94ASHE0474 – L-force 9400 HighLine Servo Drive Inverter
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Product Information
The Lenze E94ASHE0474 is a 22 kW servo drive inverter belonging to the L-force 9400 HighLine series, designed for precision single-axis and multi-axis motion control tasks. Operating on a three-phase nominal supply voltage of 400 V AC to 500 V AC across an allowable input range of 320 V AC to 550 V AC, this drive supplies a rated output current of 47 A at 400 V AC and 37.6 A at 500 V AC. Operating at a default switching frequency of 4 kHz, it provides an output frequency range of 0 Hz to 1000 Hz and delivers a short-term peak current capability of 94 A (200% for 3 seconds) alongside a 60-second maximum current rating of 70.5 A, enabling high-dynamic acceleration in automated machinery.
For system integration and encoder feedback, the drive incorporates an onboard CANopen system bus supporting baud rates from 10 kbit/s to 1000 kbit/s, along with dual expansion slots for fieldbus communication modules including PROFINET (E94AYCEN) and EtherCAT (E94AYCEI). Motor feedback is managed through dedicated inputs, including a standard resolver interface on terminal X7 and a high-density X8 port supporting SinCos, Hiperface, EnDat 2.1/2.2, SSI, and incremental encoders. When commissioning a replacement unit, drive parameters, firmware, and application programs stored on a plug-in Lenze MM200 or MM300 memory module can be transferred directly into the new unit without requiring a PC, while technical support from ABC Industrial Parts can assist in verifying parameters and option module setup.
System status and operating condition are displayed via front-panel LEDs, including DRV-READY for normal operating state and power supply active, DRV-ERR for fault or warning conditions, and dedicated CAN-RUN / CAN-ERR indicators for system bus communication monitoring. Advanced diagnostics can be performed using the Lenze Engineer software, an E94AZCUS USB diagnostic adapter, a keypad terminal, or by accessing the internal fault log buffer. Initial troubleshooting should involve verifying mains supply phase balance, checking encoder line connections on terminals X7/X8, and inspecting safety module signals; internal power stage failures (OC1) or hardware self-test faults (HFAIL) cannot be serviced in the field, and acquiring a fully tested replacement from ABC Industrial Parts offers a fast path to restoring production.
Technical Specifications
| Manufacturer | Lenze |
| Part number | E94ASHE0474 |
| Model / type | 9400 HighLine Single Drive |
| Component type | Servo Drive Inverter |
| Product family | L-force |
| Series | 9400 HighLine |
| Nominal supply voltage | 400 / 500 V AC |
| Supply voltage range | 320 - 550 V AC |
| Rated power | 22 kW |
| Rated output current (400V) | 47 A |
| Rated output current (500V) | 37.6 A |
| Maximum output current (60s) | 70.5 A |
| Peak short-term current (3s) | 94 A |
| Default switching frequency | 4 kHz |
| Output frequency range | 0 - 1000 Hz |
| Onboard system bus | CANopen (10 - 1000 kbit/s) |
Programming and Configuration
Parameterization and application programming for the Lenze E94ASHE0474 are performed using Lenze Engineer (HighLine) software. This engineering environment provides configuration tools for setting drive dynamic parameters, configuring positioning routines, and defining multi-axis coordination functions. Direct physical communication with the drive for setup or online monitoring can be established using the E94AZCUS USB diagnostic adapter connected to the drive interface.
Removable plug-in MM200 and MM300 flash memory modules host the complete operational profile, including drive parameters, custom motion programs, and firmware. During field maintenance, extracting the memory card from an existing unit and inserting it into a replacement drive transfers all operational data automatically, eliminating the need to connect a programming tool on the factory floor.
Communication and System Integration
The E94ASHE0474 features an integrated CANopen system bus capable of operating at selectable transmission speeds between 10 kbit/s and 1000 kbit/s. This bus facilitates cross-communication between individual 9400 series drives for electronic gearing and tight dynamic synchronization across multi-axis production systems.
Dual expansion module slots enable direct integration into higher-level fieldbus networks. By installing option modules such as the E94AYCEN for PROFINET or E94AYCEI for EtherCAT, the drive interfaces seamlessly with central programmable logic controllers. Dedicated feedback terminals X7 and X8 support a wide variety of feedback devices, including resolvers, SinCos, Hiperface, EnDat 2.1/2.2, SSI, and incremental encoders.
Diagnostics and Status Indication
Diagnostic monitoring of the drive is supported through hardware indicators, software diagnostic environments, and onboard logging tools. The onboard system log maintains an internal fault buffer accessible via parameters, capturing error events as hexadecimal code sequences. Technicians can connect locally using the E94AZCUS USB diagnostic adapter, a keypad terminal, or over a network web server module using Lenze Engineer software to analyze real-time operational status.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| DRV-READY | Green - Solid | Drive in ready state, power supply active and normal. |
| DRV-ERR | Red - Solid / Flashing | Fault or trip state active (flashing red indicates warning/error state). |
| CAN-RUN / CAN-ERR | Green / Red - Varies | Status of CANopen system bus communication. |
Replacement and Spare Part Considerations
Replacing an E94ASHE0474 servo drive requires verifying that the replacement unit matches the physical ratings and option module configuration of the original device. Ensure that any auxiliary communication cards, such as PROFINET (E94AYCEN) or EtherCAT (E94AYCEI), and safety modules like Safe Torque Off (STO / SM301) are correctly seated in the option slots before powering up the drive.
Commissioning time is significantly minimized by using the removable MM200 or MM300 memory module. Transferring the existing memory module into the replacement unit automatically loads all operational parameters, application programs, and firmware settings. If the original memory module is corrupted or unreadable, parameter files must be re-downloaded to a new card using Lenze Engineer software.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| 0x00020000 | LU (Low Voltage) | DC bus voltage falls below undervoltage threshold | Mains supply phase failure, line voltage drops below limit, main switch opened during operation | Check mains AC supply input voltage, check line fuses and contactors. |
| 0x00030000 | OU (Overvoltage) | DC bus voltage exceeds upper voltage limit | Excessive braking energy returned from motor, deceleration time too short, braking chopper or resistor open circuit | Increase deceleration ramp time, check external braking resistor and braking chopper circuit. |
| 0x00040000 | OC1 (Short Circuit / Earth Fault) | Inverter output overcurrent or earth fault detected | Short circuit in motor power cable, phase-to-earth breakdown, defective motor insulation, drive power stage fault | Check motor power cables and connection terminals, test motor insulation resistance. Internal power stage failure requires unit return for repair. |
| 0x00050000 | OC2 (Motor Overcurrent) | Motor load current exceeds maximum dynamic limits | Acceleration time too short, mechanical jam/jamming, incorrect motor data parameterisation | Check mechanical drive train for stiffness or jams, increase acceleration ramp time, verify motor parameter settings. |
| 0x00060000 | OH (Heatsink Overtemperature) | Drive heatsink temperature exceeds maximum permitted limit | Inadequate control cabinet ventilation, internal fan defective, clogged heatsink cooling fins, high ambient temperature | Clean heatsink, inspect internal cooling fan operation, ensure proper control cabinet airflow and temperature limits. |
| 0x00070000 | OH4 (Motor Thermal Sensor) | Motor temperature sensor triggered overtemperature protection | Motor thermal overload, continuous operation above nominal torque, thermal sensor wire open circuit | Allow motor to cool, reduce mechanical load, verify motor temperature sensor wiring (PTC/KTY/TP). |
| 0x00080000 | I2t Inverter Overload | Thermal load accumulator for the drive power output stage reached maximum | Drive operated at heavy overload current for extended duration | Reduce duty cycle or continuous output torque, re-dimension servo drive sizing if load cycle requires sustained high torque. |
| 0x000b0000 | HFAIL (Hardware Failure) | Internal hardware self-test or control circuit failure detected | Internal power supply rail failure, control board component failure, gate driver fault | Internal hardware fault — return unit for repair or replace servo drive module. |
| 0x000c0000 | MEM-ERR (Memory Module Error) | Failure reading or writing parameter data to MM200/MM300 memory module | Memory module not firmly inserted, data corruption on memory card, damaged memory module hardware | Reseat memory module in slot, re-download parameter file via Lenze Engineer, replace memory module if error persists. |
| 0x000d0000 | SAFE-ERR (Safety Module Fault) | Functional safety module mismatch or STO channel signal inconsistency | Dual-channel STO inputs mismatched, safety module internal fault, missing safety module option | Check STO input channels wiring and timing, inspect safety module seating. Internal safety module defect requires module return/replacement. |
| 0x000e0000 | ENC-FAIL (Feedback Error) | Motor feedback encoder signal failure on X7 or X8 input | Encoder cable broken or disconnected, incorrect feedback type configured, bad encoder signal shielding | Check encoder cables, connector seating, screen grounding, and encoder supply voltage parameters. |
Frequently Asked Questions
How do I transfer parameters to a replacement Lenze E94ASHE0474 drive without a PC?
You can transfer parameters directly by swapping the removable MM200 or MM300 memory module from the original unit into the replacement drive, which automatically restores the saved parameter data, application programs, and firmware settings upon power-up.
Which motor feedback types are supported by the E94ASHE0474 servo inverter?
The drive supports standard resolvers via the X7 terminal interface, as well as SinCos, Hiperface, EnDat 2.1/2.2, SSI, and incremental encoders via the high-density X8 port.
What fieldbus networks can be integrated with this drive?
In addition to the built-in CANopen system bus, the E94ASHE0474 supports fieldbus expansion modules via its dual option slots, including PROFINET (E94AYCEN), EtherCAT (E94AYCEI), PROFIBUS-DP, and EtherNet/IP.
What does the fault code 0x00040000 (OC1) indicate on the E94ASHE0474?
Fault code 0x00040000 indicates an inverter output overcurrent or earth fault, typically caused by a short circuit in the motor cable, defective insulation, or an internal power stage breakdown.
What engineering software is required for programming and diagnostics?
Parameter configuration and diagnostics are conducted using Lenze Engineer (HighLine) software, which can connect directly to the drive via an E94AZCUS USB diagnostic adapter.
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