Lenze 326443 632_E_3 630 Series Servo Drive
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Product Information
The Lenze 326443 (model type 632E3) is a 3-phase AC servo drive from the Lenze 630 Series, designed for dynamic speed, position, and torque control of permanent magnet synchronous AC servo motors. Operating on a 3-phase mains supply voltage range of 340 V AC to 528 V AC (400 V AC nominal), this unit delivers 3.0 kW rated output power with a 7.0 A continuous output current and a 14.0 A peak current capability for up to 5 seconds. Built around a PWM IGBT power stage operating at an 8 kHz switching frequency, the inverter features an integrated dynamic braking chopper for managing high dynamic deceleration loads in packaging, material handling, textile manufacturing, and CNC machine tooling automation.
Integrating a replacement 326443 drive into an existing system requires matching physical connections and parameter configurations. Closed-loop feedback is processed through a standard 9-pin Sub-D connector (X7) designed for resolver feedback on Lenze 630 Series motors. Network communication is handled via a modular expansion slot (Slot X1) that accepts option cards such as PROFIBUS-DP (2131IB), CANopen (2172IB), or LECOM RS232/RS485 (2102IB). Because replacement units require system setup, technical staff must transfer parameters using Lenze Global Drive Control (GDC) software or a plug-in keypad module to load parameter sets into internal non-volatile EEPROM memory. Engineering guidance from ABC Industrial Parts can assist in ensuring fieldbus module alignment and parameter restoration during commissioning.
Drive operation and fault states are indicated on the front panel via status LEDs for Ready (Green), Fault (Red), and IMP / Disable (Yellow). Diagnostic code readings can be reviewed using a LECOM keypad or through the diagnostic window in GDC software. Common operational faults include DC bus undervoltage (code 1 LU), resolver signal issues on terminal X7 (code 10 Sd), and parameter memory errors (code 9 Pr). While external fieldbus, supply, or motor wiring issues can be remediated on-site, persistent system faults or internal failure codes (code 12 H07) indicate board-level hardware defects where replacing the unit or sourcing repair through ABC Industrial Parts provides a direct route back to operational status.
Technical Specifications
| Supply Voltage | 400 V AC |
| Supply Voltage Range | 340 - 528 V AC |
| Continuous Output Current | 7.0 A |
| Peak Output Current | 14.0 A |
| Output Voltage | 0 - 400 V AC |
| Rated Power Output | 3.0 kW |
| Switching Frequency | 8 kHz |
Programming and Configuration
The Lenze 326443 servo drive utilizes Lenze Global Drive Control (GDC) software as its primary engineering tool for parameter configuration, commissioning, and system monitoring. Local adjustments and fault code readings can also be performed directly using a plug-in LECOM keypad module attached to the front interface. Parameters define motor performance curves, field-oriented vector control profiles, velocity loop response, current limits, and programmable digital I/O function assignments.
Internal non-volatile EEPROM memory supports storage of dual parameter sets. This capability allows the controller to switch between distinct production profiles or store a complete configuration backup directly within the unit. When installing a replacement 632E3 drive, downloading the original project file via GDC software or transferring parameter data into the EEPROM ensures exact replication of acceleration ramps, torque limits, and motor encoder settings.
Communication and System Integration
System integration for the Lenze 326443 drive is facilitated through dedicated onboard connectors and a flexible fieldbus module slot designated as Slot X1. Speed and position feedback from permanent magnet synchronous AC servo motors connects through a 9-pin Sub-D connector at interface X7, tailored for standard resolver feedback interfaces.
Fieldbus communications are established by inserting optional interface cards into Slot X1. Supported interface modules include the 2131IB PROFIBUS-DP card, the 2172IB CANopen card, and the 2102IB LECOM card supporting RS232 or RS485 serial communications. When substituting a drive, transfer the option module from the existing unit to Slot X1 and verify that node address switches and baud rate settings match the original controller setup.
Diagnostics and Status Indication
Real-time operational status is displayed directly on the front panel of the Lenze 326443 drive via three LED indicators: Ready, Fault, and IMP / Disable. These LEDs provide quick identification of supply availability, internal trip conditions, and output stage enablement.
Detailed diagnostics can be accessed via the LECOM keypad interface, which displays numerical TRIP fault history, or through the diagnostic monitor window in Lenze Global Drive Control (GDC) software.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Ready | Green - Solid ON / OFF | ON: Drive controller is ready for operation. OFF: Controller inhibit active or no supply power. |
| Fault | Red - Solid / Flashing | ON / Flashing: Active TRIP condition or hardware/system error requiring shutdown. |
| IMP / Disable | Yellow - Solid ON | ON: Pulse inhibit / Controller disable active (power stage blocked). |
Replacement and Spare Part Considerations
When replacing an existing Lenze 326443 (632E3) drive, verify that the spare matches the electrical ratings of 3.0 kW output power and 7.0 A continuous output current. In addition to matching the drive part number, fieldbus communication cards installed in Slot X1 (such as 2131IB PROFIBUS or 2172IB CANopen modules) must be swapped from the defective unit to the replacement drive if the replacement unit is provided without optional network hardware.
A replacement drive must be parameterized prior to running the motor. Attempting to operate a replacement unit on default factory parameters may result in overcurrent trips (code 4 OC2), communication faults (code 8 CE0), or motor feedback errors (code 10 Sd). Restore the machine configuration backup to internal EEPROM using GDC software, and confirm that resolver feedback cabling at connector X7 is securely grounded.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| 1 | LU | Undervoltage in DC bus intermediate circuit | Mains supply voltage too low, phase failure, or power supply dropped out. | Check mains voltage, line fuses, and main contractor connection. |
| 2 | OU | Overvoltage in DC bus intermediate circuit | Braking energy too high during deceleration, missing brake resistor, or brake chopper fault. | Increase deceleration time ramp or check external braking resistor and chopper circuits. |
| 3 | OC1 | Short circuit / Earth fault | Short circuit between motor phases or short circuit to ground/earth in motor cable or motor winding. | Check motor and wiring for short circuits and earth faults. Measure motor winding resistance. |
| 4 | OC2 | Overcurrent during acceleration / dynamic load | Acceleration ramp too steep, motor mechanically blocked, or current controller misconfigured. | Check drive sizing, ramp times, mechanical binding, and motor parameters. |
| 5 | OH | Drive heatsink overtemperature | Heatsink temperature exceeded threshold due to inadequate cooling, dirty heatsink, fan failure, or high ambient temperature. | Clean heatsink, ensure adequate cabinet ventilation, check cabinet fan. |
| 6 | OH4 | Motor overtemperature | Motor thermal contact / PTC thermistor open circuit or motor overloaded. | Allow motor to cool, check motor load, check PTC connection cables. |
| 7 | I2t | I2t load limit exceeded | Drive operated at continuous overload above rated continuous current for too long. | Reduce mechanical load or re-evaluate duty cycle and drive rating. |
| 8 | CE0 | Communication fault | Interruption in communication link to external controller or LECOM module. | Check fieldbus cable, shield connection, terminal resistors, and master controller communication state. |
| 9 | Pr | Parameter error / EEPROM checksum fault | Corrupted parameter memory due to power interruption during write operation or hardware corruption. | Reload default parameter set or download project parameter backup. If error persists, hardware internal fault - return unit for repair. |
| 10 | Sd | Resolver / speed feedback fault | Cable break in resolver harness, bad shield connection, or defective resolver transducer. | Check resolver feedback wiring on X7 connector, shield grounding, and resolver resistance. |
| 11 | EF | External fault input active | Digital input programmed for external fault fault-signal activated. | Check external fault signal source connected to control terminals. |
| 12 | H07 | Internal hardware failure / System fault | Internal power supply defect, micro-controller reset fault, or damaged power stage board. | Internal hardware fault - power cycle drive; if persistent, replace unit or return for repair. |
Frequently Asked Questions
What software is used to program and diagnose the Lenze 326443 drive?
The Lenze 326443 servo drive is configured and diagnosed using Lenze Global Drive Control (GDC) software. Local parameter access and status monitoring can also be performed via a plug-in LECOM keypad module.
What feedback interface does the 632_E_3 model require for motor control?
The drive requires closed-loop resolver feedback connected via the dedicated 9-pin Sub-D connector labeled X7 on the front panel.
Which fieldbus expansion modules can be installed in Slot X1?
Slot X1 accepts several fieldbus modules, including the 2131IB PROFIBUS-DP card, the 2172IB CANopen card, and the 2102IB LECOM RS232/RS485 module.
How do I resolve a TRIP code 9 (Pr) parameter error?
TRIP code 9 indicates corrupted parameter memory in internal EEPROM. Reload the saved machine parameter backup using GDC software or reset to factory defaults. If the fault persists after downloading the backup, an internal hardware failure has occurred.
What should be checked when TRIP code 3 (OC1) is displayed?
TRIP code 3 (OC1) signifies a short circuit or earth fault. Inspect the motor cabling and motor windings for phase-to-phase short circuits or ground faults, and measure motor winding resistance before reapplying power.
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