Lenze EVS9326-EKV004 EVS9326-EK V004 9300 Servo Cam Controller
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Product Information
The Lenze EVS9326-EKV004 is an 11 kW digital AC servo controller within the 9300 Servo family, engineered for high-dynamic motion control applications requiring decentralized execution. Featuring the integrated electronic cam profiler (-EK firmware variant), this drive executes complex dynamic curves locally, offloading motion calculation requirements from central controllers. Designed with an IP20 enclosure for cabinet installation, the drive operates across a 3-phase supply voltage range of 320 V AC to 528 V AC. It provides a rated output current of 23.5 A with a 150% peak overload capacity reaching 35.2 A for up to 60 seconds, operating at an 8 kHz switching frequency across an output frequency spectrum of 0 to 480 Hz.
Connecting the replacement unit to your system involves establishing proper feedback, control, and network interfaces. System wiring includes a dedicated resolver feedback connector (X7), master encoder input (X8), and encoder simulation output (X9), along with 4 digital inputs, 2 digital outputs, 2 differential analog inputs, and 2 analog outputs for direct local signal interaction. Communication across multi-axis configurations relies on the integrated CANbus system interface, while the Automation Interface (AIF) slot accommodates fieldbus modules such as PROFIBUS-DP or CANopen. Placing a spare unit into service requires transferring parameter sets and electronic cam tables using Lenze Global Drive Control (GDC) software or the optional EMZ9371BC Keypad XT, ensuring that drive profiles, gain parameters, and option settings match the original installation before enabling operation. Technical technicians at ABC Industrial Parts can assist with extracting parameter files and backing up drive configurations during service transitions.
Real-time troubleshooting and operational state verification are facilitated by front-panel LEDs alongside detailed code history registers. Three visual status indicators provide quick diagnostics: a green DRIVE READY light for operational state or controller inhibit, a red DRIVE ERROR / FAULT light for active trips, and a yellow BUSY / WARNING indicator for task processing or limit thresholds. First-line diagnostics include evaluating supply line stability, feedback cable integrity at X7, braking chopper and resistor circuits, and CAN bus termination resistors. Critical conditions such as internal microcontroller errors (H05) or EEPROM parameter corruption (EER) indicate board-level hardware failures that cannot be serviced in the field. When internal memory or power stage components fail, obtaining a tested exchange unit or utilizing expert repair services through ABC Industrial Parts provides a rapid path to restoring machine productivity.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EVS9326-EKV004 |
| Model / Type | EVS9326-EK V004 |
| Product Family | 9300 Servo |
| Component Type | Servo Controller |
| Rated Power | 11 kW |
| Supply Voltage Range | 320 - 528 V AC |
| Rated Output Current | 23.5 A |
| Maximum Output Current | 35.2 A |
| Switching Frequency | 8 kHz |
| Output Frequency Range | 0 - 480 Hz |
| Protection Rating | IP20 |
| Digital Inputs | 4 |
| Digital Outputs | 2 |
| Analog Inputs | 2 |
| Analog Outputs | 2 |
| Integrated System Bus | CANbus |
Programming and Configuration
Parameterization and cam profile management for the Lenze EVS9326-EKV004 are conducted using Lenze Global Drive Control (GDC) software along with Lenze Cam Designer. These engineering tools allow software developers and maintenance personnel to generate, calculate, and modify decentralized electronic cam tables and motion trajectories. Motion profiles are downloaded directly into non-volatile drive memory, enabling localized position control without requiring continuous motion command streams from an external controller.
Manual configuration and local parameter management can also be executed using the optional plug-in EMZ9371BC Keypad XT operating module. The keypad provides access to the parameter structure, fault memory history, and operational status parameters. When transferring configurations between units, parameter sets must be completely downloaded and verified, paying specific attention to speed loop gain settings, thermal limits, and cam interpolation table integrity to prevent profile loading errors such as code PR0.
Communication and System Integration
Inter-drive networking on the EVS9326-EKV004 is handled via an integrated CANbus system bus interface. This protocol supports multi-axis drive synchronization, position data sharing, and cross-drive parameter transfer. Correct network integration requires installing standard 120-ohm bus termination resistors at both physical ends of the CAN network and verifying matching baud rate settings across all participating drives.
Extended fieldbus integration is accomplished using the Automation Interface (AIF) slot located on the front of the drive controller. Optional plug-in modules including the EMF2133IB for PROFIBUS-DP, EMF2175IB for CANopen, INTERBUS, or LECOM interfaces allow connection to plant-wide PLC networks. Onboard I/O connectivity consists of 4 digital inputs, 2 digital outputs, 2 differential analog inputs, and 2 analog outputs, supplemented by dedicated terminals for resolver motor feedback (X7), master encoder input (X8), and encoder simulation (X9).
Diagnostics and Status Indication
Drive state monitoring and diagnostic reporting for the EVS9326-EKV004 utilize three color-coded front panel LED indicators alongside software-based diagnostic buffers. The green DRIVE READY LED lights solid during normal operation and blinks when the drive controller is inhibited. The red DRIVE ERROR / FAULT LED indicates an active trip or registered fault requiring acknowledgment, while the yellow BUSY / WARNING LED signals active processing tasks or current and thermal warning limits.
In-depth fault analysis can be conducted by connecting a PC running Global Drive Control software using the EMF2102IB PC system bus adapter, or by querying the active fault history buffer via the EMZ9371BC Keypad XT. Diagnostic records store error histories to assist in pinpointing external issues such as motor cable short circuits, line voltage instability, feedback signal loss, or internal board-level faults.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| DRIVE READY | Green - Solid / Blinking | Solid: Drive operational / normal state. Blinking: Drive ready, controller inhibited / disabled. |
| DRIVE ERROR / FAULT | Red - Solid / Blinking | Trip condition active or fault registered; requires acknowledgment / reset. |
| BUSY / WARNING | Yellow - Solid | Drive processing task active or warning limit reached (e.g. current limit, overtemperature warning). |
Replacement and Spare Part Considerations
When replacing an existing Lenze EVS9326-EKV004 unit, it is essential to verify that the replacement controller matches both the exact part number and the -EK firmware variant. The -EK classification indicates built-in electronic cam profiler functionality; substituting a standard inverter or different firmware variant will result in missing motion profile execution capabilities and system communication failure.
Prior to applying power to the replacement drive, all configuration data, motor parameters, and electronic cam tables must be restored from a known good backup using GDC software or transferred via the EMZ9371BC keypad. Physical option modules, such as AIF fieldbus cards (EMF2133IB or EMF2175IB), must be carefully transferred from the original drive, ensuring secure seating in the expansion slot before commissioning the machine.
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 | Overcurrent trip during acceleration or short circuit at output terminals | Short circuit in motor winding, grounded motor cable, dynamic overcurrent threshold exceeded | Check motor and motor wiring for insulation fault or short circuit; check acceleration time settings. |
| OC2 | Overcurrent during deceleration | Overcurrent trip during braking phase | Braking ramp too short, motor regenerated power excessive | Extend deceleration time, verify brake chopper and braking resistor function. |
| OC5 | I x t Overload | Drive overloaded continuously beyond thermal integration limit | Drive undersized for mechanical load, mechanical jamming/sticking | Check mechanical drive train for stiffness/jamming, check current limit settings and duty cycle. |
| OU | Overvoltage DC bus | DC bus voltage exceeded upper trip limit | Excessive braking energy returned from motor, missing or damaged braking resistor, braking chopper failure | Verify mains voltage, inspect brake resistor connection and value, check brake chopper. |
| LU | Undervoltage DC bus | DC bus voltage fell below lower trip limit | Mains supply failure, supply phase loss, supply voltage dropped under load | Check input line voltage and fuses, verify mains supply stability. |
| OH | Heatsink Overtemperature | Power section heatsink temperature exceeded maximum permissible limit | Ventilation fan blocked/failed, ambient temperature too high, heatsink clogged with dust | Clean heat sink, inspect cabinet fan and drive fan operation, improve panel cooling. |
| OH4 | Heatsink Overtemperature Limit Exceeded | Critical heatsink temperature reached | Severe cooling airflow blockage or internal fan failure | Allow drive to cool down; inspect cooling system and internal fan. |
| OH7 | Motor Overtemperature (PTC/NTC) | Motor temperature sensor trip triggered via control terminal X10 | Motor thermal overload, cooling fan failure on motor, broken sensor wire | Check motor thermal load, check motor external cooling fan, verify PTC/NTC sensor and cable connections. |
| OH8 | Motor I2t Overload | Calculated motor thermal load model exceeded maximum threshold | Continuous low-speed high-torque operation without forced motor cooling | Reduce continuous motor load or fit forced-ventilation fan to motor. |
| CE0 | CAN Communication Error | System bus (CAN) communication fault | Bus cable broken, missing bus termination resistor, noise interference on CAN line | Check CAN bus wiring, 120 ohm line termination, and baud rate parameters. |
| CE1 | AIF Communication Fault | Communication failure between drive control board and plug-in AIF fieldbus module | AIF module loose, defective option module, internal interface error | Re-seat AIF module; if fault persists, replace plug-in fieldbus module or unit. |
| NMAX | Maximum Speed Exceeded | Motor speed exceeded configured maximum speed limit by more than allowable threshold | Unstable speed controller tuning, encoder feedback issue, runaway load | Check speed feedback sensor/resolver wiring, verify gain parameters in drive speed loop. |
| LP | Mains Phase Failure | Missing AC input phase detected | One input line fuse blown, loose terminal connection, asymmetric mains supply | Check line supply fuses, mains cables, and terminal connections. |
| P12 | Resolver Signal Error | Resolver feedback signal loss or track error on terminal X7 | Resolver cable broken or disconnected, damaged resolver, electrical noise on feedback cable | Inspect feedback cable, shielding, and connector at X7; verify resolver coil resistance. |
| H05 | Internal Hardware Error | Internal micro-controller hardware fault or memory corruption detected during self-test | Board-level component failure, power interruption during flash write | Internal hardware fault — power cycle drive; if fault recurs, return unit for repair or replace unit. |
| EER | EEPROM Fault | Error during reading or writing non-volatile parameter memory EEPROM | Internal parameter memory corrupted or worn out | Reload factory default parameters; if error persists, internal memory hardware fault requires unit replacement or repair. |
| PR0 | Cam Profile Error / Program Error | Invalid or incomplete cam profile data loaded | Cam table calculation error, missing interpolation node points | Re-download cam tables from Lenze Cam Designer / GDC software. |
Frequently Asked Questions
What software is required to configure the Lenze EVS9326-EKV004?
Configuration and cam profile programming are performed using Lenze Global Drive Control (GDC) software combined with Lenze Cam Designer software. Parameter changes can also be performed locally using the optional EMZ9371BC Keypad XT.
What does a blinking Green LED on the EVS9326-EKV004 indicate?
A blinking Green DRIVE READY LED indicates that the drive controller is powered and ready for operation, but the controller inhibit / disable function is currently active.
How are electronic cam tables loaded onto a replacement EVS9326-EKV004 drive?
Cam tables are loaded into non-volatile drive memory by downloading saved project files from Lenze Cam Designer or GDC software via a PC connected through an EMF2102IB PC system bus adapter, or by cloning parameters via the EMZ9371BC keypad module.
What does fault code H05 mean on this drive?
Fault code H05 indicates an internal hardware error or micro-controller memory fault detected during self-test. If power cycling the drive does not clear the error, internal hardware component failure requires repairing or replacing the unit.
Can fieldbus communications such as PROFIBUS-DP be added to the EVS9326-EKV004?
Yes, fieldbus support is expanded via the Automation Interface (AIF) slot, which accepts plug-in communication modules such as the EMF2133IB for PROFIBUS-DP or EMF2175IB for CANopen.
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