Lenze EVS9326-EPV004 9300 Series 11kW Servo Position Controller
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Product Information
The Lenze EVS9326-EPV004 is an 11 kW servo position controller in the Lenze 9300 Servo family, engineered to execute high-precision motion profiles and multi-axis positioning directly within the drive. Functioning as an EP variant, this unit incorporates built-in path generation, point-to-point positioning routines, and programmable profile tables, offloading motion calculations from upper-level programmable logic controllers. Designed for demanding automated machinery, the controller operates on a nominal 3-phase supply voltage of 400 V AC across an input range of 320 V AC to 528 V AC, providing a rated output current of 23.5 A and a peak current of 35.3 A at output voltages up to 460 V AC. Recognized by its compact panel-mount housing, front-facing LED indicators, Sub-D resolver feedback interface, and modular option slots, it offers an integrated motion solution for packaging, printing, and material handling equipment.
Connecting and commissioning a replacement EVS9326-EPV004 requires matching physical interfaces and transferring the application parameters. Resolver feedback from synchronous servo motors connects via Sub-D terminal X7, while auxiliary incremental encoder signals connect to terminal X8. Cross-communication and network integration are provided via an onboard CAN System Bus interface supporting baud rates up to 500 kbit/s, supplemented by Automation Slot A and Function Slot M for optional expansion modules such as the EMF2133IB PROFIBUS or EMF2171IB CANopen interfaces. Putting a replacement drive into service requires restoring parameter settings stored in internal non-volatile EEPROM memory, which holds up to four independent parameter sets. Parameters can be copied using a pluggable Keypad XT (EMZ9371BC) or Lenze Global Drive Control (GDC) software, with technical assistance available from ABC Industrial Parts for parameter transfer and backup extraction.
Local drive status and operational diagnostics are provided by two front-panel LED indicators. The green Ready/Operation LED indicates whether the controller is active or inhibited, while the red TRIP LED signals active warning conditions or trip shutdowns. Comprehensive diagnostics can be performed using Keypad XT status code menus C0003 and C0161, as well as an internal fault history log (code C0168) that records the last four trip conditions alongside operating hour timestamps. Practical troubleshooting includes verifying incoming 3-phase power, inspecting resolver cabling at connector X7, and checking braking chopper configuration under heavy deceleration. If non-volatile memory errors (EER) or micro-controller hardware failures (H05) occur, internal component faults cannot be serviced in the field, and securing a tested replacement or unit repair through ABC Industrial Parts provides a rapid return to production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EVS9326-EPV004 |
| Model / Type | EVS9326-EP V004 |
| Product Family | 9300 Servo |
| Component Type | Servo Controller |
| Rated Power | 11 kW |
| Rated Current | 23.5 A |
| Peak Output Current | 35.3 A |
| Nominal Supply Voltage | 400 V AC |
| Minimum Supply Voltage | 320 V AC |
| Maximum Supply Voltage | 528 V AC |
| Output Voltage | 460 V AC |
| Switching Frequency | 8 kHz |
| Maximum Output Frequency | 480 Hz |
Programming and Configuration
Parameter management and motion profile programming for the EVS9326-EPV004 are performed through Lenze Global Drive Control (GDC) software or via the pluggable Keypad XT (EMZ9371BC) control unit. The EP positioning variant includes integrated software functions for homing, relative and absolute positioning, and profile tables, eliminating the need for dedicated external positioning modules.
The internal memory architecture utilizes non-volatile EEPROM storage configured to hold up to four independent parameter sets. This capability allows operators to store alternative machine configurations locally. During unit replacement, parameter sets can be read from the existing drive and loaded into the replacement controller using GDC over a PC communication interface or copied directly via the Keypad XT module.
Communication and System Integration
The EVS9326-EPV004 comes equipped with an onboard CAN System Bus interface supporting CAN standard 2.0B at transmission speeds up to 500 kbit/s. This interface provides fast cross-coupling between multiple drives for synchronized multi-axis movements and direct integration with higher-level control systems.
For integration into broader industrial networks, the controller features two expansion slots: Automation Slot A and Function Slot M. These slots accommodate optional plug-in communication modules, including the EMF2133IB PROFIBUS module and EMF2171IB CANopen module, as well as INTERBUS and serial PC modules. Primary feedback is interfaced via Sub-D resolver connector X7, while auxiliary encoder and master frequency signals are supported on connector X8.
Diagnostics and Status Indication
Operational monitoring is provided through hardware LED indicators and real-time diagnostic parameters accessible via Keypad XT or Lenze GDC software. Real-time operating conditions and active fault states are logged in parameter menus C0003 and C0161, while Lenze GDC software offers an online diagnostic monitor and oscilloscope function for signal inspection.
The drive maintains an internal fault buffer in parameter C0168, which retains the four most recent TRIP fault occurrences along with system operating hours. Local status LEDs on the front panel give immediate visual feedback regarding operational readiness, controller inhibits, warnings, and trip shutdowns.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Red LED (TRIP) | Red - Flashing / Solid ON | Flashing: Warning condition active; Solid ON: Active TRIP fault condition present, drive disabled |
| Green LED (Ready / Operation) | Green - Solid ON / Flashing | Solid ON: Controller enabled and ready for operation; Flashing: Controller inhibited / safe stop active |
Replacement and Spare Part Considerations
When replacing a Lenze EVS9326-EPV004, ensure the part number matches exactly to guarantee compatible power ratings (11 kW / 23.5 A) and integrated positioning firmware. Optional communication cards located in Automation Slot A or Function Slot M (such as EMF2133IB or EMF2171IB) must be removed from the old unit and installed into the replacement drive.
A replacement controller must be loaded with the machine's specific parameter set before operating. If the parameter memory in the existing drive is still accessible, download the parameter file using GDC software or copy it using Keypad XT. After parameter download, verify motor current parameters (C0087), resolver wiring on connector X7, and fieldbus termination resistors.
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 detected in output stage due to power section short circuit or ground fault. | Short circuit in motor windings or cable, ground fault, motor cable excessively long. | Check motor cable and winding insulation; verify motor cable length complies with limits; check drive output terminals. |
| OC2 | Overcurrent during acceleration | Output peak current exceeded during motor acceleration phase. | Acceleration time ramp set too short, motor mechanical overload or blockage, incorrect motor data programmed. | Increase acceleration time ramp (C0012/C0013), check motor freedom of rotation, verify motor configuration parameters. |
| OC5 | I2t motor overload | Calculated motor thermal load limit exceeded I2t threshold. | Continuous motor overload, incorrect rated motor current parameter C0087. | Check mechanical load and duty cycle; check motor rating settings in parameter C0087. |
| OU | DC bus overvoltage | DC bus voltage exceeded upper threshold limit (>770 V DC). | Regenerative energy from motor during braking phase too high, missing or defective brake chopper / brake resistor. | Increase deceleration ramp time; install or inspect external brake resistor and brake chopper circuit. |
| LU | DC bus undervoltage | DC bus voltage dropped below minimum threshold (<370 V DC). | Mains supply voltage drop, phase loss in supply line, power supply failure. | Check mains supply voltage, check supply line fuses and contactors. |
| OH | Heatsink overtemperature | Heatsink temperature exceeded 85°C. | Ambient temperature too high, fan failure, obstructed cooling vents or dirty heatsink fins. | Improve control cabinet ventilation, clean heatsink, replace internal cooling fan if non-operational. |
| OH4 | Motor thermal overload | Motor temperature sensor (PTC or thermal contact) tripped open circuit. | Motor overheated due to sustained overload or insufficient motor cooling; defective PTC cable. | Allow motor to cool; inspect motor cooling/fan; check PTC/TK wiring connected to terminals X1/X2. |
| OH7 | Interior drive temperature high | Internal ambient temperature inside drive enclosure exceeded threshold limit. | Ambient temperature inside control enclosure excessive. | Reduce cabinet ambient temperature; verify cabinet cooling fan/air conditioning. |
| OH8 | Motor temperature sensor wire break | Wire break or missing signal detected on motor temperature sensor input. | Disconnected or broken PTC/KTY sensor cable. | Check wiring continuity between motor temperature sensor and drive terminals. |
| CE0 | CANbus communication error | Lenze System Bus CAN communication fault / Bus-Off state. | Incorrect bus baud rate setting, defective CAN cable, missing bus termination resistors (120 Ohm), extreme EMC noise. | Verify CAN baud rate settings, check CAN bus cable shield and termination resistors at both ends of the bus. |
| EER | EEPROM memory error | Internal EEPROM checksum error or parameter data corruption detected. | Internal EEPROM fault, interrupted save procedure during power-off. Board-level hardware fault. | Reload factory default settings (C0002 = 11); if error persists, internal control board hardware fault — return unit for repair or replace unit. |
| H05 | Internal hardware error | Internal hardware self-test failure detected during startup or runtime. | Internal power supply board or micro-controller hardware failure. | Internal hardware fault — power cycle drive; if persistent, return unit for repair or replace controller. |
| NMAX | Max motor speed exceeded | Motor speed feedback exceeded programmed maximum speed limit (C0028). | Incorrect speed controller parameters, improper encoder/resolver signal, runaway load. | Check motor feedback device wiring, review tuning parameters and maximum speed parameter C0028. |
| PI | Mains phase failure | Loss of one or more incoming mains power supply phases detected. | Blown mains input fuse, tripped circuit breaker, loose supply phase wire. | Check mains voltage on all three phases L1, L2, L3 under load. |
| Sd2 | Resolver fault / signal break | Loss of resolver feedback signal or cable wire break detected on connector X7. | Defective resolver, damaged feedback cable, loose connector X7. | Check resolver cable connections at connector X7, test resolver resistance values. |
| Sd3 | Encoder track fault | Incremental encoder signal error or track loss detected on connector X8. | Broken encoder cable, defective encoder, incorrect encoder supply voltage. | Check encoder cable and shield grounding; check encoder power supply and signal tracks A, B, Z. |
| PER | Program memory error | Internal program code check error or flash memory fault. | Internal control board hardware failure or corrupted firmware flash. | Internal hardware failure — return unit for factory repair or replace unit. |
Frequently Asked Questions
How are parameters transferred to a replacement EVS9326-EPV004 drive?
Parameters can be transferred by uploading the existing parameter file using Lenze Global Drive Control (GDC) software or by saving the parameter set onto a Keypad XT (EMZ9371BC) module and transferring it to the replacement controller.
What feedback device does the EVS9326-EPV004 use for motor control?
The primary feedback interface is designed for synchronous servo motors equipped with a resolver, connected through Sub-D terminal X7. Auxiliary incremental encoder input is supported via connector X8.
Which fieldbus expansion modules are compatible with this model?
The drive features Automation Slot A and Function Slot M, which support communication option cards such as the EMF2133IB PROFIBUS module and EMF2171IB CANopen module.
What do the front-panel status LEDs indicate?
The green LED indicates controller ready status when solid ON, or controller inhibit/safe stop when flashing. The red LED indicates a warning state when flashing, or a TRIP fault condition with drive disabled when solid ON.
What steps should be taken if fault code EER or H05 appears?
Fault code EER indicates an EEPROM memory checksum error, while H05 indicates an internal hardware self-test failure. You can attempt to reset parameters to factory default (C0002 = 11); if the fault persists, an internal board-level failure is present requiring drive repair or replacement.
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