Lenze EVS9323-ES 9300 Series 1.5kW Servo Inverter
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Product Information
The Lenze EVS9323-ES is a 1.5 kW servo inverter drive from the Lenze 9300 Servo series, engineered for dynamic motor control and precise positioning in industrial automation applications. Designed for 3-phase mains operation between 320 V AC and 528 V AC, this IP20-rated unit delivers a continuous output current of 3.9 A and a peak current capability of 5.9 A at an 8 kHz switching frequency. With a maximum output frequency of 480 Hz and a power dissipation rating of 90 W, the drive supports synchronized multi-axis control, web tensioning, and high-precision speed regulation across packaging machinery, printing presses, textile equipment, and material handling gantries.
Connecting and commissioning the EVS9323-ES into an existing automation line relies on modular feedback and fieldbus options. The inverter features integrated feedback inputs supporting resolvers via Sub-D connector X7, as well as incremental and SinCos encoders via connector X8, alongside an encoder simulation output for axis synchronization. It includes an onboard CAN system bus operating up to 500 kbit/s, while Automation Slot X1 accommodates plug-in communication modules such as PROFIBUS-DP (EMF2133IB or EMF2131IB) and CANopen (EMF2175IB). When putting a replacement drive into service, parameter configuration must be restored from the original unit using Lenze Global Drive Control (GDC) V4.x/V5.x software via a USB-to-CAN adapter (EMF2177IB) or cloned using an EMZ9371BC operating keypad module. Pre-configuring spare drives with verified parameter backups through ABC Industrial Parts ensures direct electrical and functional alignment.
System status monitoring and fault identification are displayed through front-panel LEDs, where a solid green POWER LED confirms operational control power and a red FAULT LED signals active trip conditions. Detailed diagnostic tracking is available through the EMZ9371BC keypad menu or the diagnostic window in Global Drive Control software, with the internal fault memory retaining the last eight trip events in parameters C0168 and C0169. Error conditions range from DC bus undervoltage (LU) and overvoltage (OU) to overcurrent (OC1) and encoder signal faults (Sd2, Sd3). If hardware failure alarms such as H05 or internal heatsink sensor fault OH7 occur, internal electronic components are not field-serviceable, making drive repair or exchange through ABC Industrial Parts the quickest solution to resume production.
Technical Specifications
| Rated Power | 1.5 kW |
| Supply Voltage Range | 320 - 528 V AC |
| Rated Output Current | 3.9 A |
| Maximum Output Current | 5.9 A |
| Power Dissipation | 90 W |
| Maximum Output Frequency | 480 Hz |
| Switching Frequency | 8 kHz |
| Onboard System Bus | CAN (up to 500 kbit/s) |
| Protection Rating | IP20 |
Programming and Configuration
Engineering and drive commissioning for the Lenze EVS9323-ES are performed using Lenze Global Drive Control (GDC) software V4.x or V5.x. The software connects to the inverter over the onboard CAN system bus using an interface hardware tool, such as the Lenze EMF2177IB USB-to-CAN adapter. Through GDC, operators can adjust motor control loops, set gain parameters, configure encoder feedback scaling, and manage fault monitoring thresholds.
For direct panel-side operation without a PC, parameter sets can be cloned and restored using the pluggable Lenze EMZ9371BC operating keypad module. The keypad allows fast transfer of parameter structures from an operating or donor inverter directly into a replacement drive. Parameter resets to factory settings can be triggered using code C0002 when clearing previous configurations during drive re-commissioning.
Communication and System Integration
The EVS9323-ES includes an onboard CAN system bus capable of data transmission rates up to 500 kbit/s. This integrated interface allows direct drive-to-drive communication, enabling multi-axis speed and positioning synchronization across complex machinery lines. Motor feedback integration is supported via connector X7 for standard resolvers and connector X8 for incremental or SinCos encoders, supplemented by an encoder simulation output.
Higher-level plant fieldbus integration is achieved through Automation Slot X1 on the front of the inverter. This expansion slot accepts plug-in communication modules including the EMF2133IB and EMF2131IB PROFIBUS-DP cards, as well as the EMF2175IB CANopen card. When exchanging drives, fieldbus option cards must be transferred to the replacement unit and checked for secure connector seating and correct node addressing.
Diagnostics and Status Indication
Operational monitoring on the Lenze EVS9323-ES is provided by status LEDs on the front cover, diagnostic software menus, and internal error logging. A solid green POWER LED indicates that internal control logic voltages are healthy, while a solid or flashing red FAULT LED signals an active drive trip condition.
For precise fault analysis, the inverter maintains a trip history buffer storing the last eight trip events in parameters C0168 and C0169. Technicians can read fault codes, real-time DC bus levels, thermal states, and output currents using the display on the EMZ9371BC keypad module or through the diagnostic monitor inside Global Drive Control.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| POWER | Green - Solid | Control supply voltage present and internal power logic operational |
| FAULT | Red - Solid/Flashing | Active drive trip or fault condition triggered |
Replacement and Spare Part Considerations
When selecting a replacement for a Lenze EVS9323-ES, confirm that the complete part number matches to ensure identical power ratings (1.5 kW), output current limits (3.9 A continuous / 5.9 A peak), and IP20 physical mounting specs. Replacing the unit with the exact hardware variant prevents current limit trips or thermal mismatches during peak machine loading.
A replacement EVS9323-ES is not plug-and-play and requires parameter transfer before operation. The full parameter set must be backed up from the existing drive or restored from system archives using Global Drive Control software or an EMZ9371BC keypad module. Additionally, any option card installed in Automation Slot X1 must be moved to the spare drive to maintain fieldbus integration.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| LU | DC Bus Undervoltage | DC bus voltage dropped below the allowable minimum threshold level (approx. 430 V DC). | Mains supply failure, voltage drop on line supply, main switch opened during operation, supply line impedance too high. | Check mains voltage, check supply wiring and fuses, check DC link connections. |
| OU | DC Bus Overvoltage | DC bus voltage exceeded the allowable maximum threshold level (approx. 770 V DC). | Excessive regenerative energy during deceleration, brake resistor missing/defective, braking chopper inactive or wrong deceleration ramp. | Extend deceleration time, connect or check external brake resistor, check brake transistor function. |
| OC1 | Short Circuit / Instantaneous Overcurrent | Instantaneous short circuit or excessive peak motor current detected at inverter output. | Short circuit in motor cable or motor winding, ground fault, acceleration ramp too steep, motor parameter mismatch. | Check motor and motor cable for short circuit, check motor parameters, increase acceleration time. |
| OC2 | Earth Fault / Ground Fault | Earth/ground fault current detected on motor output phase. | Insulation breakdown in motor winding or power cable, ground short in cable shield or terminal box. | Check motor cable and motor insulation resistance with megohmmeter. |
| OC5 | Drive Overload (Ixt) | Continuous current load over time exceeded inverter continuous thermal limit. | Mechanical overload, motor blocked or undersized drive for cycle duty. | Check mechanical load and drive sizing, check duty cycle. |
| OH | Heatsink Overtemperature | Inverter heatsink temperature exceeded maximum limit (approx. 85°C / 90°C). | Inadequate cooling, fan blocked or defective, ambient temperature too high, dirty cooling fins. | Clean heatsink, ensure adequate cabinet ventilation, check cabinet fan operation. |
| OH4 | Motor Overtemperature | Motor thermal sensor (PTC or KTY) triggered motor overtemperature alarm. | Motor thermal overload, continuous low speed operation without forced ventilation, sensor cable wire break. | Allow motor to cool down, check motor cooling and loading, verify PTC/KTY sensor connection. |
| OH7 | Heatsink Temperature Sensor Fault | Internal heatsink temperature sensor circuit open or shorted. | Internal temperature sensor failure or damaged control PCB. | Internal hardware fault — return unit for repair or replace inverter. |
| NMAX | Speed Limit Exceeded | Actual motor speed exceeded maximum permitted motor speed. | Unstable speed control loop, incorrect encoder scaling, runaway load. | Check speed controller gains, check encoder resolution settings, check maximum speed threshold. |
| H05 | Internal Hardware Fault | Internal micro-controller hardware or system test error. | Internal electronic component defect, power supply fault on control board. | Internal hardware fault — return unit for repair or replace inverter. |
| EER | EEPROM Memory Error | Checksum or read/write error in internal non-volatile EEPROM memory. | Power failure during parameter save operation, corrupted EEPROM chip. | Reload factory default settings (C0002) and restore parameter set. If fault persists, replace unit. |
| CE0 | Automation Slot Communication Fault | Communication interruption between inverter and optional fieldbus card in slot X1. | Loose module connection, fieldbus master stopped, bus cable cut or disconnected. | Check option module seating in slot X1, check fieldbus cable connection and master status. |
| Sd2 | Resolver Signal Fault | Resolver feedback signal error or track loss detected on connector X7. | Defective resolver cable, shield connection broken, damaged resolver in motor. | Check resolver cable wiring and shield grounding, check resolver impedance. |
| Sd3 | Encoder Signal Fault | Incremental/SinCos encoder feedback signal failure on connector X8. | Encoder cable defect, missing encoder supply voltage, track A/B signal loss. | Check encoder cable and connectors, check encoder supply voltage level in drive parameters. |
Frequently Asked Questions
How do I transfer parameters to a replacement Lenze EVS9323-ES inverter?
Parameters can be transferred using the EMZ9371BC keypad module to save the parameter set from the original drive and copy it to the replacement. Alternatively, parameter sets can be uploaded and downloaded via Lenze Global Drive Control (GDC) V4.x/V5.x software using an EMF2177IB USB-to-CAN adapter.
What communication option cards can be installed in the EVS9323-ES?
The EVS9323-ES includes Automation Slot X1, which supports plug-in modules such as the EMF2133IB and EMF2131IB PROFIBUS-DP cards, as well as the EMF2175IB CANopen card.
What feedback devices work with the Lenze EVS9323-ES?
The drive supports resolvers connected to Sub-D terminal X7, as well as incremental and SinCos encoders connected to terminal X8. It also features an encoder simulation output for axis-to-axis synchronization.
What causes fault code LU on the EVS9323-ES drive?
Fault code LU indicates a DC bus undervoltage condition where the DC link drops below approximately 430 V DC. It is typically caused by line power interruptions, main switch tripping, or excessive line supply impedance.
Can internal faults such as code H05 be serviced on-site?
Fault code H05 indicates an internal microcontroller or hardware defect on the control board. These internal electronic faults are not field-serviceable, requiring the inverter to be replaced or sent in for professional repair.
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