Lenze EVS9326-ES 9300 Series 11 kW Servo Inverter Drive
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Product Information
The Lenze EVS9326-ES is an 11 kW panel-mount servo inverter drive from the 9300 Series, engineered for high-dynamic motion control in automated manufacturing systems. Designed with an IP20 enclosure rating, this drive operates on a 3-phase mains supply ranging from 320 V AC to 528 V AC at 20 A input current, delivering a regulated output voltage from 0 V AC to 480 V AC. It provides 23.5 A continuous output current and a peak overload capacity of 35.3 A for up to 60 seconds, utilizing field-oriented vector control algorithms to govern both synchronous and asynchronous servo motors up to 600 Hz output frequency.
System connectivity and motion alignment rely on an integrated System Bus CANopen interface operating up to 500 kbit/s, alongside standard resolver inputs and dual 500 kHz high-speed encoder input/output interfaces for master-slave synchronization. The unit features an Automation Interface (AIF) slot that supports plug-in fieldbus option cards—such as the EMF2133IB PROFIBUS or EMF2192IB EtherCAT modules—as well as the EMZ9371BC keypad module. Commissioning a replacement unit requires transferring application parameter sets, which are stored internally across four non-volatile EEPROM memory slots. Parameters can be extracted and written using Lenze Global Drive Control (GDC) Software V4.x or V5.x, or transferred directly using the plug-in keypad module. Assistance with parameter extraction from donor units or backed-up parameter sets is available through ABC Industrial Parts.
Operational status and fault identification are displayed on the physical front panel via dedicated status LEDs and the keypad LCD display, which maintains a fault history buffer of the last eight TRIP events. Basic fault verification involves checking 3-phase supply stability, DC link voltage levels, feedback cable shielding on terminals X7/X8, and bus termination resistors on the CAN interface. Internal hardware issues—including output stage overcurrent (OC1), control power failures (H05), or EEPROM corruption (EER)—are not field-serviceable and require drive replacement or unit repair. ABC Industrial Parts provides tested replacement units and repair options to minimize machine downtime.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EVS9326-ES |
| Model / Type | 9300 Servo Inverter |
| Component Type | Servo Inverter |
| Product Family | 9300 Series |
| Rated Power | 11 kW |
| Supply Voltage Range | 320 - 528 V AC |
| Mains Input Current | 20 A |
| Continuous Output Current | 23.5 A |
| Maximum Output Current | 35.3 A |
| Output Voltage Range | 0 - 480 V AC |
| Maximum Output Frequency | 600 Hz |
| Switching Frequency | 8 kHz |
| Control Method | Field-oriented vector control |
| Integrated On-Board Communication | CANopen / System Bus (CAN) |
| Enclosure Rating | IP20 |
Programming and Configuration
Engineering and configuration of the Lenze EVS9326-ES are carried out using Lenze Global Drive Control (GDC) Software version V4.x or V5.x. The software permits online monitoring, axis parameterization, loop tuning, and structure adjustment for both synchronous and asynchronous servo motor profiles.
The inverter contains non-volatile EEPROM memory capable of holding four complete internal parameter sets. These parameter sets enable flexible multi-recipe operation or quick restoration during maintenance routines without needing external PC tools if a configured keypad module is present.
Field copying of parameters can be completed using the optional Lenze EMZ9371BC Keypad Module. By uploading parameter values from an operating unit into the keypad module and downloading them into a spare EVS9326-ES, technicians can fully duplicate drive settings and restore motion control functionality rapidly.
Communication and System Integration
Network integration on the EVS9326-ES is supported through an on-board CANopen System Bus interface operating at communication rates up to 500 kbit/s. This integrated CAN link facilitates direct axis-to-axis synchronization, cross-communication between drives, and centralized PLC supervisory control.
An integrated Automation Interface (AIF) slot expands industrial fieldbus compatibility. Optional plug-in modules, such as the EMF2133IB PROFIBUS module or the EMF2192IB EtherCAT module, allow the drive to communicate natively within complex master control architectures.
For physical feedback and motion tracking, the drive features integrated resolver connection terminals alongside 500 kHz high-speed encoder input and output interfaces. These high-speed frequency bus interfaces support electronic shaft synchronization and master encoder tracking across multi-axis equipment.
Diagnostics and Status Indication
Real-time operational feedback for the Lenze EVS9326-ES is provided through two LED indicators located on the front of the unit and detailed text displays when a keypad module is attached. The diagnostic software interface within Global Drive Control (GDC) enables online tracking of drive states including active TRIP conditions, Inverter Inhibit (IMP), system messages, and active warnings.
When a fault condition occurs, the drive records the error code into an internal memory buffer that stores the last eight TRIP events. Reviewing this history through the keypad interface or GDC software helps technicians identify recurring overvoltage, current spike, or communication loss events.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| DRIVE READY (Green LED) | Green - Solid | Green lit continuously: Drive is ready for operation / enabled. |
| DRIVE STATUS / TRIP (Red LED) | Red - Solid or Flashing | Red lit continuously or blinking: Fault condition / TRIP active. Indicates active fault code on drive display. |
Replacement and Spare Part Considerations
When swapping out a failed unit for a replacement Lenze EVS9326-ES, verify that the incoming drive matches the 11 kW power rating and 23.5 A continuous current specification. Ensure that any option card present in the Automation Interface (AIF) slot—such as a PROFIBUS or EtherCAT module—is physically transferred to the replacement unit.
Configuration data must be loaded into the replacement drive before enabling operation. This can be accomplished by uploading the saved parameter set using Lenze Global Drive Control (GDC) software version V4.x or V5.x, or by transferring the memory contents directly via an EMZ9371BC Keypad Module.
Verify all hardware safety circuits during installation. The EVS9326-ES features built-in Safe Torque Off (STO) terminals; ensure safety wiring, resolver or encoder connections on X7/X8, and 120 Ohm CAN bus termination resistors are correctly wired and seated prior to reapplying power.
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 | Instantaneous overcurrent on motor output terminals. | Short circuit in motor cable, short circuit in motor winding, earth fault, damaged power stage. | Check motor cable and motor insulation; check for earth leakage. If error persists with motor disconnected, internal power stage failure occurred (requires return for repair). |
| OC2 | Overcurrent during acceleration | Motor current exceeded maximum allowed current threshold during acceleration. | Acceleration time too short, motor mechanical overload, wrong motor parameters. | Increase acceleration time, check mechanical load and motor parameter settings. |
| OC5 | I x t overload | Continuous thermal load threshold exceeded for inverter output stage. | Drive continuously overloaded, incorrect motor rating or duty cycle too high. | Check drive load cycle and reduce continuous load. |
| OU | Overvoltage DC link | DC bus voltage exceeded upper threshold (>770 V DC). | Excessive regenerative energy during deceleration, brake chopper defective, brake resistor open circuit or incorrect resistance. | Increase deceleration time, check external braking resistor and connection, check brake chopper circuit. |
| LU | Undervoltage DC link | DC bus voltage dropped below minimum threshold (<280 V DC). | Mains supply failure, supply voltage too low, phase failure, precharge circuit defect. | Check mains voltage and supply fuses. If mains supply is correct, internal DC link voltage detection or power supply circuit fault (requires service). |
| OH | Heatsink overtemperature | Heatsink temperature exceeded 90°C. | Insufficient cooling airflow, cabinet fan failed, ambient temperature too high, dirty heatsink fins. | Clean heatsink, ensure adequate cabinet ventilation and check operational status of internal cooling fan. |
| OH4 | Motor overtemperature | Motor thermal contact or PTC sensor opened on terminals X6/T1, X6/T2. | Motor overheating, mechanical overload, sensor cable broken. | Allow motor to cool down, check motor load and verify motor thermal sensor connection. |
| OH7 | Internal drive temperature high | Drive internal control board temperature exceeded 70°C. | Control cabinet temperature too high, internal ventilation failure. | Reduce control cabinet ambient temperature and verify fan operation. |
| CE0 | Communication error AIF module | Interruption in communication between drive control board and Automation Interface (AIF) module. | AIF module loose, bad contact, module defective, fieldbus line disrupted. | Check mechanical seating of AIF module, check fieldbus cable and connectors. |
| CE1 | System Bus (CAN) communication error | Communication failure on built-in System Bus CAN network. | CAN bus cable broken, missing bus termination resistors (120 Ohm), baud rate mismatch, high noise interference. | Check CAN cabling, verify termination resistors at both ends of CAN bus, check baud rate parameter settings. |
| EER | EEPROM fault | Error during reading or writing non-volatile internal EEPROM memory. | EEPROM memory chip corrupt or hardware failure. | Reload default parameter set. If fault persists, internal hardware error — return unit for repair. |
| H05 | Internal supply voltage fault | Internal control voltage power supply out of tolerance. | Internal board component failure. | Internal hardware fault — return unit for repair. |
| Sd3 | Resolver / Encoder fault | Resolver or feedback encoder signal failure / track breakdown. | Feedback cable disconnected or damaged, defective resolver/encoder, loose pin connection on X7/X8. | Check feedback cable wiring, shielding, sub-D connectors, and verify encoder/resolver function. |
| NMAX | Maximum speed exceeded | Actual motor speed exceeded configured maximum speed limit (NMAX parameter). | Unstable speed controller loop, incorrect feedback direction or parameter tuning error. | Check speed controller parameter settings and feedback wiring polarity. |
Frequently Asked Questions
What software is used to program the Lenze EVS9326-ES?
The EVS9326-ES is programmed and configured using Lenze Global Drive Control (GDC) Software version V4.x or V5.x.
How can drive parameters be transferred to a spare EVS9326-ES without a PC?
Parameters can be copied directly using the optional Lenze EMZ9371BC Keypad Module by copying the parameter set from the operational drive into the keypad and downloading it to the replacement unit.
What does a solid red light on the DRIVE STATUS LED indicate?
A solid or blinking red DRIVE STATUS / TRIP LED indicates an active fault condition (TRIP). The active fault code can be viewed on the drive keypad display or through GDC software.
What causes an OC1 fault code on the EVS9326-ES?
An OC1 fault indicates an instantaneous overcurrent on the motor terminals. Common causes include a short circuit in the motor cabling, shorted motor windings, or a damaged output power stage inside the drive.
Which fieldbus interfaces are compatible with the EVS9326-ES?
The drive has an integrated CANopen system bus and supports optional fieldbus communication modules via its AIF slot, including the EMF2133IB PROFIBUS module and EMF2192IB EtherCAT module.
Can internal power stage or EEPROM faults (like OC1, EER, or H05) be fixed in the field?
No, codes such as OC1 (if present with motor disconnected), EER, and H05 indicate internal hardware or memory component failures that require the drive to be replaced or sent in for professional repair.
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