Lenze EVS9321-ESV004 9300 Servo Inverter 0.75 kW
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Product Information
The Lenze EVS9321-ESV004 is a 9300 series standard servo inverter engineered for precision motion control in automated industrial equipment. Operating from a 3-phase AC supply rating of 400 V to 480 V AC across an input range of 320 V to 528 V AC, this 0.75 kW drive provides a continuous output current of 2.5 A at an 8 kHz switching frequency, with a peak overload current rating of 3.75 A for up to 60 seconds to accommodate heavy dynamic acceleration. Housed in an IP20 protection enclosure for control cabinet mounting, the unit supports maximum output frequencies up to 480 Hz and is widely utilized across packaging, labeling, textile manufacturing, printing, and material handling systems.
Connecting the unit into a machine control architecture is facilitated by integrated CANopen and Lenze System Bus interfaces alongside a 9-pin Sub-D connector for standard resolver feedback processing. Additional expansion capability is provided via a FIF slot that accepts fieldbus communication modules, including the EMF2133IB or DMF21A PROFIBUS-DP modules, DeviceNet, INTERBUS, or LECOM RS232/RS485 serial communication cards, as well as the EMF2171IB or EMF2172IB PC-System Bus Adapter. Terminal connections provide six programmable digital inputs, four digital outputs, two bipolar analog inputs and outputs, and a dedicated status relay output. Putting a replacement drive into service requires proper configuration transfer, as the unit stores up to four complete parameter sets in non-volatile EEPROM memory that can be restored or cloned using the plug-in EMZ9371BC operating keypad or Lenze Global Drive Control (GDC) software. Expert support from ABC Industrial Parts can assist maintenance teams with parameter extraction and spare unit preparation prior to installation.
Operational status and fault identification are displayed directly on the unit via dual-color LEDs, where a Red/Green LED indicates controller readiness, inhibit, fault, or warning states, and a Green BUS LED shows CAN system bus initialization and activity. Detailed diagnostics and status codes such as IMP, TRIP, or OPT are readable on the optional keypad, or can be queried via parameter C0168 using GDC software. First-line troubleshooting for trip codes includes inspecting motor phase wiring for short circuits (OC1), verifying DC bus levels for overvoltage (OU above 770 V DC) or undervoltage (LU below 430 V DC), checking line fuses, and confirming 120-ohm bus termination resistors for CAN errors (CE0). When diagnostic codes such as EER or H05 indicate EEPROM corruption or internal control board hardware failure that cannot be cleared by restoring defaults, board-level faults are not field-serviceable, making a tested replacement or repair through ABC Industrial Parts the most efficient path back to operational capability.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EVS9321-ESV004 |
| Model / Type | 9300 Servo Inverter Standard |
| Component Type | Servo Inverter |
| Product Family | 9300 Servo |
| Rated Power | 0.75 kW |
| Supply Voltage | 3AC 400 / 480 V AC |
| Supply Voltage Range | 320 - 528 V AC |
| Continuous Output Current | 2.5 A |
| Peak Output Current | 3.75 A |
| Switching Frequency | 8 kHz |
| Maximum Output Frequency | 480 Hz |
| IP Rating | IP20 |
| Feedback Interface | 9-pin Sub-D Resolver |
| Integrated Communication | CANopen / Lenze System Bus |
| Expansion Slot | FIF slot (PROFIBUS-DP, DeviceNet, INTERBUS, LECOM RS232/RS485) |
Programming and Configuration
Programming and parameter administration for the Lenze EVS9321-ESV004 servo inverter are conducted primarily using Lenze Global Drive Control (GDC) software or directly via the plug-in EMZ9371BC operating keypad module. The drive features non-volatile EEPROM memory capable of retaining up to four separate, complete parameter sets. This internal multi-parameter storage allows operators to switch operational profiles or pre-configure alternative machine modes without requiring direct software connectivity during routine maintenance.
When commissioning a replacement unit, stored parameter sets can be uploaded from the original controller and transferred to the replacement drive using the EMZ9371BC keypad without needing a dedicated PC on the factory floor. Alternatively, connecting via GDC software allows full parameter modification, monitoring, and parameter set backup. If parameter corruption occurs—indicated by fault code EER—a factory default reset can be initiated by setting parameter C0002 to 1, after which validated machine configuration files can be re-loaded to re-establish proper control loops, ramp times, and I/O assignments.
Communication and System Integration
The Lenze EVS9321-ESV004 standard servo inverter incorporates integrated CANopen and Lenze System Bus interfaces, permitting direct master-slave coordination and high-speed network messaging without requiring external communication cards. Machine networks utilize the system bus for rapid data exchange across multi-axis drive arrays, requiring proper line termination with 120-ohm resistors at both network ends to prevent communication dropouts.
To adapt the drive to higher-level fieldbus architectures, the integrated FIF expansion slot supports a range of option cards. These include the EMF2133IB and DMF21A modules for PROFIBUS-DP, as well as optional cards for DeviceNet, INTERBUS, and LECOM RS232/RS485 serial communication. Additionally, the EMF2171IB and EMF2172IB PC-System Bus Adapters provide direct interface connections for PC-based diagnostic tools and centralized control monitoring.
Diagnostics and Status Indication
Local diagnostic oversight on the EVS9321-ESV004 drive is provided by front-mounted LED indicators and keypad status readouts. The Ready / Fault LED displays operational state through solid and flashing states: solid green indicates operational readiness, flashing green signifies controller inhibit, solid red signals an active trip fault, and flashing red indicates an active warning condition. The Green BUS LED reflects system bus status, staying off when inactive, flashing green during pre-operational initialization, and glowing solid green when active operational communication is established.
For precise fault evaluation, the EMZ9371BC keypad presents status codes such as IMP (inhibit active), TRIP, or OPT (option card status). When connected via Lenze GDC software, technicians can query parameter C0168 to retrieve historic and active fault codes, allowing immediate root-cause identification across electrical, thermal, communication, or feedback anomalies.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Ready / Fault LED | Red / Green - Solid / Flashing | Green ON = Controller operational / ready; Green Flashing = Controller inhibit; Red ON = Trip / Fault active; Red Flashing = Warning active. |
| BUS LED | Green - Solid / Flashing / Off | Off = System bus inactive; Green Flashing = Pre-operational state / Initializing; Green ON = System bus active / operational. |
Replacement and Spare Part Considerations
When swapping an existing drive with a replacement Lenze EVS9321-ESV004 unit, maintenance personnel must ensure exact model identity and electrical ratings match, specifically confirming the 0.75 kW power rating, 2.5 A continuous current capability, and 3AC 400/480 V input requirements. In addition, any plug-in fieldbus module fitted in the FIF expansion slot—such as a PROFIBUS-DP EMF2133IB module or LECOM serial card—must be transferred directly from the original unit or replicated on the replacement drive to ensure seamless PLC communication.
A replacement unit cannot operate straight out of the box without transferring the application-specific parameters. Before applying main power, verify that the 9-pin Sub-D resolver cable is securely connected to terminal X7 and that motor temperature sensors (PTC/TK) are wired into terminal X6/1-X6/2. Parameter sets should be restored using the EMZ9371BC operating keypad or uploaded via Global Drive Control software, followed by setting correct node addresses and baud rates for integrated CANopen networking.
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 / Overcurrent | Instantaneous short circuit or extreme overcurrent detected at drive power output. | Short circuit in motor winding or motor cable, acceleration time too short, motor cable too long. | Inspect motor cabling and insulation, check motor phase resistance, increase acceleration time. |
| OC5 | I2t Overload | Continuous thermal overload threshold (I2t) exceeded. | Drive loaded continuously beyond rated continuous output current. | Reduce mechanical load on motor, check duty cycle, verify sizing of drive and motor. |
| OU | Overvoltage DC Bus | DC bus voltage exceeded upper limit threshold (approx. 770 V DC). | Regenerative energy during deceleration too high, deceleration time too short, missing or damaged brake chopper / brake resistor. | Extend deceleration time, verify brake chopper operation and brake resistor connection. |
| LU | Undervoltage DC Bus | DC bus voltage fell below lower operating limit (approx. 430 V DC). | Mains voltage supply too low, mains phase loss, power supply brownout. | Check input mains voltage, verify line fuses and input wiring. |
| OH | Heatsink Overtemperature | Drive heatsink temperature exceeded maximum threshold (>90°C). | Inadequate cooling airflow, heatsink fins clogged with dust, internal fan fault, ambient temperature too high. | Clean heatsink, verify fan function, ensure sufficient cabinet ventilation. |
| OH4 | Motor Overtemperature | Motor thermal sensor (PTC/TK) at terminal X6/1-X6/2 triggered thermal trip. | Motor overloaded, motor fan failed, broken wire to thermal sensor. | Allow motor to cool down, inspect motor cooling fan, check thermal sensor wiring. |
| CE0 | System Bus Communication Error | Interruption in CAN / System Bus communication. | Bus cable disconnected or damaged, missing termination resistors, incorrect node address or baud rate. | Check CAN bus wiring, ensure 120-ohm termination resistors are installed, verify communication parameters. |
| Sd7 | Resolver Feedback Fault | Signal loss or line break detected on resolver feedback connector (X7). | Resolver cable unplugged or broken, loose shielding connection, defective resolver. | Check resolver wiring and connector X7 seating, check cable shielding, test resolver. |
| EER | EEPROM Memory Error | Internal EEPROM checksum error or parameter read/write fault. | Parameter memory corrupted by supply power glitch during write, hardware memory failure. | Re-load factory default settings (C0002 = 1); if fault persists, internal hardware fault — return unit for repair. |
| H05 | Internal Hardware Error | Internal control board or power section failure. | Component breakdown on power board or control card. | Internal hardware fault — return unit for repair. |
Frequently Asked Questions
How do I transfer parameters to a replacement Lenze EVS9321-ESV004 drive?
Parameters can be transferred using the optional EMZ9371BC operating keypad, which allows uploading parameter sets from internal non-volatile EEPROM memory and downloading them to the spare drive. Alternatively, Lenze Global Drive Control (GDC) software can be used via a PC system bus adapter to back up and restore drive configurations.
What do the front LED indicators on the EVS9321-ESV004 mean?
The Ready / Fault LED shows operational readiness when solid green, controller inhibit when flashing green, active trip faults when solid red, and warnings when flashing red. The Green BUS LED indicates system bus status: off for inactive, flashing green for initialization, and solid green when CAN communication is operational.
What causes an OU trip code on the Lenze 9300 servo inverter?
An OU fault indicates DC bus overvoltage exceeding approximately 770 V DC. This is typically caused by high regenerative braking energy during rapid deceleration. Recommended checks include extending deceleration times and verifying the operation and wiring of the brake chopper and external braking resistor.
Can the EVS9321-ESV004 connect to PROFIBUS-DP networks?
Yes. While the drive features built-in CANopen and Lenze System Bus connectivity, it can integrate into PROFIBUS-DP networks by installing an optional plug-in expansion module, such as the EMF2133IB or DMF21A, into its FIF slot.
How can I resolve an EER EEPROM memory error code?
An EER code signifies an internal parameter memory corruption. Attempt to reset the unit to factory defaults by setting parameter C0002 to 1 in GDC software or via keypad, then reload the saved parameter set. If the error persists after resetting, an internal hardware failure has occurred and the unit requires repair or replacement.
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