Lenze EVS9327-EP 9300 Series 11 kW Servo Position Controller
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Product Information
The Lenze EVS9327-EP is an 11 kW digital servo position controller in the 9300 Series family, designed to manage high-dynamic motion tasks in automated machinery. Operating on a 3-phase AC supply ranging from 320 V to 528 V AC with a rated input current of 22 A, this unit supplies a continuous output current of 23.5 A and a maximum peak current of 35.3 A at an 8 kHz switching frequency. Built specifically for demanding multi-axis positioning, speed control, and torque management applications, the controller incorporates integrated pre-programmed function blocks that handle point-to-point positioning and electronic gearbox functions without relying on external motion modules.
System connections and fieldbus integration are achieved through an onboard Sub-D 9-pin CAN system bus interface supporting CANopen communication, along with a dedicated Automation Interface slot for plug-in fieldbus modules such as PROFIBUS-DP (EMF2133IB), DeviceNet (EMF2175IB), or INTERBUS (EMF2113IB). Control wiring connects to four digital inputs, four digital outputs, two ±10V bipolar analog inputs, two analog outputs, and feedback terminals supporting resolvers as well as SinCos or incremental encoders with encoder simulation output. Replacing an existing controller requires transferring the machine's parameter setup, which can be completed using Lenze Global Drive Control software or by plugging in a Keypad XT module (EMF2102IB) to transfer stored configuration data from the non-volatile internal EEPROM. When replacing an operational unit, ABC Industrial Parts can assist with sourcing tested replacement units and verifying configuration transfers.
Diagnostic information is provided on the front panel via two status LEDs: a green LED indicating drive enabled or inhibited status, and a red LED signaling warning or active fault conditions. Detailed diagnostic codes and operational registers are accessible through the Keypad XT module, CANbus registers, or the Global Drive Control monitoring tools. Fault codes such as OC1 (short circuit), OU (DC bus overvoltage), or LU (DC bus undervoltage) point directly to external power, motor, or braking resistor issues, whereas internal system faults like H05 or EEPROM errors (EER) indicate board-level component failure. When internal hardware trips occur that cannot be serviced on site, securing a tested exchange unit or professional unit repair from ABC Industrial Parts offers a direct path to restoring machine operation.
Technical Specifications
| Supply voltage | 400 V AC |
| Supply voltage range | 320 - 528 V AC |
| Rated input current | 22 A |
| Continuous output current | 23.5 A |
| Maximum output current | 35.3 A |
| Rated power output | 11 kW |
| Power loss | 380 W |
| Maximum output frequency | 480 Hz |
| Switching frequency | 8 kHz |
| Digital inputs | 4 |
| Digital outputs | 4 |
| Analog inputs | 2 (±10V bipolar, 12-bit) |
| Analog outputs | 2 (10-bit) |
Programming and Configuration
Parameterization and system setup for the Lenze EVS9327-EP are managed using Lenze Global Drive Control (GDC) engineering software or directly through the optional Keypad XT EMF2102IB display module. The controller features internal non-volatile EEPROM memory capable of retaining up to four independent, switchable parameter sets. These parameter sets store configuration data including motor parameters, positioning profiles, ramp times, I/O mapping, and fieldbus node parameters.
When commissioning a new unit or swapping a replacement into an existing installation, drive parameters can be quickly duplicated. Connecting the Keypad XT module allows technicians to back up settings from a functional drive and restore them directly into the replacement unit without needing a PC connection. Alternatively, GDC software enables parameter backup, off-line modification, real-time diagnostic monitoring, and oscilloscope-based position loop tuning.
Communication and System Integration
The EVS9327-EP features built-in communication capabilities provided by an onboard 9-pin Sub-D CAN system bus interface. Supporting CANopen communication, this interface allows high-speed coordination between multiple drives, system controllers, and distributed I/O in multi-axis motion setups. For integration into broader fieldbus networks, the drive includes a flexible Automation Interface (AIF) expansion slot designed for plug-in fieldbus modules, including PROFIBUS-DP (EMF2133IB), DeviceNet (EMF2175IB), and INTERBUS (EMF2113IB).
Physical interface options are expanded through onboard control terminals, including four programmable digital inputs, four digital outputs, two bipolar ±10V analog inputs with 12-bit resolution, and two analog outputs with 10-bit resolution. Feedback integration supports resolvers as well as high-resolution SinCos or incremental encoders, complemented by a dedicated encoder simulation frequency bus output for master-slave synchronization.
Diagnostics and Status Indication
Status monitoring for the EVS9327-EP is supported by front panel diagnostic LEDs and digital monitoring software. The green LED indicates whether the drive is operational or inhibited, while the red LED alerts operators to a trip fault condition or an active warning. Detailed status parameters, history buffers, and fault logs can be accessed via the Keypad XT display, CAN/AIF fieldbus registers, or the trace and oscilloscope diagnostic views inside Lenze Global Drive Control software.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Ready / Red LED | Red - Solid / Blinking | Solid red indicates drive fault / trip active; blinking red indicates warning condition |
| Operation / Green LED | Green - Solid / Blinking | Solid green indicates drive enabled and operating; blinking green indicates drive inhibited / controller lock |
Replacement and Spare Part Considerations
Replacing a Lenze EVS9327-EP requires matching both the exact hardware specification and the parameter set used by the machine logic. Because the 9300 series utilizes modular positioning function blocks, any replacement unit must be configured with the identical parameter set and fieldbus node address to ensure proper interaction with the main machine PLC. Fieldbus communication cards (such as PROFIBUS EMF2133IB or DeviceNet EMF2175IB) must be moved from the original unit to the replacement slot or configured identically.
Before restoring power to a replacement drive, line fuses, motor terminal connections (U, V, W), motor feedback wiring, and thermal sensor connections (terminals T1/T2) should be thoroughly verified. Transferring stored configuration data via the pluggable Keypad XT EMF2102IB memory module simplifies field swap execution, minimizing down time while avoiding manual parameter entry errors.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OC1 | Short circuit / Earth fault | Short circuit or ground fault detected on motor terminals U, V, W. | Short circuit in motor cable, motor winding fault, ground fault, or short circuit in output stage. | Check motor and motor cable for insulation and short circuits. If motor and wiring are intact, internal power stage failure may be present requiring unit repair or replacement. |
| OC2 | Earth fault | Earth fault / ground fault in motor phase cables. | Insulation breakdown to earth in motor or cable, excessive capacitive earth current. | Check motor insulation resistance and cabling. If clean, internal ground detection circuit failure requiring repair. |
| OC5 | Overload during acceleration | Output current exceeds acceleration current limit. | Acceleration time too short, mechanical blockage, motor undersized, incorrect motor parameter settings. | Increase acceleration ramp time, check mechanical load, verify motor parameter settings. |
| OU | DC bus overvoltage | DC bus voltage exceeds upper threshold voltage. | Regenerative energy from motor during deceleration too high, brake resistor open/defective, deceleration ramp too fast. | Extend deceleration time, verify brake chopper and external brake resistor connection and resistance value. |
| LU | DC bus undervoltage | DC bus voltage drops below lower limit threshold. | Mains supply voltage failure, supply phase missing, mains voltage too low, internal charging circuit defect. | Check mains voltage and line fuses. If mains supply is correct, internal DC bus sensing or precharge circuit fault requires repair. |
| OH | Heatsink overtemperature | Heatsink temperature exceeds allowed operating threshold (> 85 °C). | Cooling fan defective, heat sink clogged, cabinet ventilation insufficient, excessive ambient temperature, high continuous overload. | Clean heat sink, check cabinet ventilation and internal fan operation, reduce ambient load. |
| OH4 | Motor overtemperature (PTC) | Motor PTC or thermal contact sensor triggered. | Motor thermal overload, cooling fan failure on motor, broken PTC cable. | Allow motor to cool down, check motor load and forced-cooling fan, verify PTC connection on terminals T1/T2. |
| OH7 | Drive internal overtemperature | Internal air or board temperature limit exceeded. | Cabinet ambient temperature too high, fan failure. | Improve enclosure cooling, inspect internal device fans. |
| OH8 | Motor I2t overload | Calculated motor thermal load (I2t) reached maximum value. | Continuous operation above motor rated current. | Reduce mechanical load or increase motor capacity. |
| CE0 | Communication error AIF module | Loss of communication between controller board and AIF module. | AIF module missing, bad contact, wrong module configuration, or module defect. | Re-seat AIF fieldbus module, verify interface contacts. Replace defective fieldbus module. |
| CE1 | CAN system bus communication error | Communication failure on integrated CAN system bus (X4). | Bus wiring fault, termination resistor missing, baud rate mismatch, high noise interference. | Check CAN bus wiring, 120 ohm bus termination, baud rate setting, and grounding. |
| H05 | Internal hardware fault | Internal controller board or processor failure during self-test. | Internal electronic component failure or corrupted microcode. | Internal hardware error — unserviceable in field. Unit must be replaced or returned for repair. |
| EER | EEPROM memory fault | Internal EEPROM parameter memory checksum error. | Power failure during parameter save, non-volatile memory chip defect. | Re-load factory default parameters. If fault persists after power cycle, internal board failure requiring unit repair. |
| NMAX | Speed threshold exceeded | Actual motor speed exceeded maximum speed setting. | Feedback polarity reversed, runaway load, gain settings unstable. | Check encoder/resolver wiring and polarity settings, verify speed controller tuning. |
| P12 | Software limit switch error | Position target or actual position exceeded programmed software limit switches. | Position command outside defined movement limits, axis unhomed. | Check programmed target positions and software limit switch parameters. |
| P13 | Following error (Position tracking error) | Difference between target position and actual position exceeds configured tolerance limit. | Mechanical jam, insufficient torque, acceleration too fast, position loop gain low. | Check mechanical axis for smooth travel, verify position loop tuning and drive current limits. |
| P18 | Homing error | Error during reference search / homing sequence. | Home switch signal missing or false trigger, zero pulse not recognized. | Check homing switch signal wiring and functional state. |
Frequently Asked Questions
What software and keypad tools are used to configure the Lenze EVS9327-EP?
Configuration and parameterization can be performed using Lenze Global Drive Control (GDC) software on a PC or using the optional pluggable Keypad XT module (part number EMF2102IB).
How are parameter sets backed up and transferred when replacing an EVS9327-EP controller?
Up to four switchable parameter sets are stored in the drive's non-volatile EEPROM. Parameters can be copied using the Keypad XT EMF2102IB module by uploading the parameter set from the original drive and downloading it into the spare unit, or by transferring parameter files via Lenze Global Drive Control software.
Which fieldbus modules are supported by the Lenze EVS9327-EP?
In addition to its built-in Sub-D CAN system bus interface (CANopen), the EVS9327-EP includes an Automation Interface (AIF) slot that supports plug-in communication modules including PROFIBUS-DP (EMF2133IB), DeviceNet (EMF2175IB), and INTERBUS (EMF2113IB).
What do the front status LEDs indicate on the Lenze EVS9327-EP?
The front status LEDs indicate drive status. A solid green LED indicates the drive is enabled and operating, while a blinking green LED indicates drive inhibit or controller lock. A solid red LED signals an active drive trip fault, and a blinking red LED indicates a warning condition.
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