Lenze 00398400 EMZ9371BB1A Keypad XT HMI Display Module
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Product Information
The Lenze 00398400 (model EMZ9371BB1A) Keypad XT is a pluggable operation and display unit designed for use with Lenze 8200 vector, 8200 motec, 9300 servo, and 9300 Servo PLC series frequency inverters and servo drives. Operating as an HMI module, it features an illuminated 2-line LCD text display that presents real-time drive metrics, operational status, and parameter structures directly on the drive face. The unit establishes connectivity with the host inverter via a direct plug-in multi-pin header interface built into the front-panel slot, providing local control and monitoring capabilities without requiring secondary display units.
Commissioning or replacing an EMZ9371BB1A keypad is straightforward due to its hot-plug capability, which allows the module to be attached or detached safely while the drive remains powered and running. The module houses integrated non-volatile EEPROM memory capable of backing up and storing one complete drive parameter set. By using the standard C0003 parameter routine, technicians can save configured drive settings into the keypad memory and duplicate them directly onto a secondary drive, enabling fast, PC-free field replacement. When replacing a failed drive or operator interface, ABC Industrial Parts can assist with tested replacement units to restore machine operation quickly.
For system diagnostics and troubleshooting, the backlit LCD screen displays explicit TRIP codes to highlight fault conditions in real time. Active diagnostic readouts include overcurrent during acceleration, DC bus overvoltage or undervoltage, drive heatsink overtemperature, internal EEPROM reading or writing errors, and keypad communication timeouts. First-line troubleshooting involves verifying that the multi-pin header connector is fully seated in the drive front slot and checking for contact cleanliness. If the keypad suffers internal memory corruption or physical component damage, repair or a tested exchange unit from ABC Industrial Parts offers a fast path back to full operational readiness.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 00398400 |
| Model/Type | EMZ9371BB1A |
| Component Type | HMI Module |
| Product Family | 8200 vector / 9300 Servo Series |
| Display Type | 2-line illuminated backlit LCD text display |
| Interface Connector | Direct plug-in multi-pin header connector |
| Parameter Storage Capacity | 1 complete drive parameter set |
| Memory Type | Integrated non-volatile EEPROM |
| Hot Swap Capable | Yes |
Programming and Configuration
The Lenze 00398400 Keypad XT provides complete on-site drive parameterization and configuration capabilities directly through its integrated key interface and 2-line LCD display. Operators can navigate parameter menus, adjust operational limits, and fine-tune drive control functions without connecting external laptops, serial programming devices, or specialized software tools.
For rapid drive setup and cloning, the module leverages built-in non-volatile EEPROM memory to store one full set of drive parameters. Using the drive parameter routine C0003, a complete parameter set can be copied from a working drive into the keypad EEPROM and subsequently loaded into replacement or secondary drives. This memory retention operates without battery power, ensuring parameter configurations remain intact during long-term storage or transfer.
Communication and System Integration
The EMZ9371BB1A connects directly to compatible Lenze drive housings using an integrated multi-pin header connector. This mechanical and electrical interface slides directly into the front-panel slot of 8200 vector, 8200 motec, 9300 servo, and 9300 Servo PLC inverters, establishing direct internal communication with the drive control board.
Designed for flexible field operation, the Keypad XT supports live hot-plug insertion and removal. Maintenance personnel can insert or disconnect the module while the underlying drive is fully powered and actively controlling a motor, enabling shared diagnostic access across multiple drives in a control cabinet without interrupting production lines.
Diagnostics and Status Indication
Diagnostic readouts are delivered through the illuminated 2-line LCD text screen, which presents active TRIP codes and clear operational messages during drive fault conditions. The clear text readout allows maintenance personnel to determine root causes instantly without cross-referencing code tables on external equipment.
Replacement and Spare Part Considerations
When replacing a Lenze 00398400 operator module or deploying a spare keypad for drive maintenance, verify full compatibility across the target drive series. The EMZ9371BB1A Keypad XT fits directly into Lenze 8200 vector, 8200 motec, 9300 servo, and 9300 Servo PLC units equipped with the standard front multi-pin slot interface.
To transfer parameters from a failed drive during field replacement, insert the keypad into the active source drive, execute parameter save routine C0003 to store the parameters in the non-volatile EEPROM, and move the keypad to the replacement drive to execute the load routine. Because memory storage is non-volatile, parameters remain secured inside the keypad even when disconnected from power.
If communication fault CE0 persists after plugging the keypad into a drive, inspect the multi-pin header pins for physical alignment or contamination. If parameter write routine failures produce persistent EER codes, internal memory breakdown may require replacing the Keypad XT module altogether.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| EER | EEPROM Fault | Error during reading or writing parameter data in internal EEPROM memory. | Defective internal EEPROM memory on keypad or drive, power interrupted during parameter save procedure. | Re-try parameter save/load procedure. If error persists, internal memory failure requires replacing the keypad module or drive board. |
| OH | Drive Heatsink Overtemperature | Drive heatsink temperature exceeded maximum safety threshold. | Insufficient cooling, fan failure, ambient temperature too high, heavy overload. | Check cabinet ventilation and drive cooling fan. Allow unit to cool down before resetting TRIP. |
| OC1 | Overcurrent Acceleration | Motor current exceeded maximum allowed current limit during acceleration phase. | Acceleration time too short, short circuit in motor cable or windings, incorrect motor parameters. | Check motor wiring and insulation, increase acceleration ramp time, verify motor nameplate data. |
| OU | DC Bus Overvoltage | DC bus voltage exceeded upper protection limit. | Deceleration ramp too steep, brake chopper or braking resistor defective or disconnected. | Increase deceleration ramp time, inspect external braking resistor connections and chopper functionality. |
| LU | DC Bus Undervoltage | DC bus voltage fell below lower operational limit. | Mains supply voltage too low, supply phase loss, power input failure. | Measure mains voltage and check input fuses, supply wiring, and contactors. |
| CE0 | Communication Error 0 | Communication interruption or timeout on system bus / keypad connection. | Loose mechanical connection, poor contact in front slot interface, bad cable connection. | Ensure keypad EMZ9371BB is firmly seated in the drive slot; clean contact pins if corroded. |
Frequently Asked Questions
How do I back up and transfer drive parameters using the Lenze 00398400 Keypad XT?
You can copy and transfer parameters by using parameter routine C0003 on the keypad. Saving the drive parameters writes a complete parameter set into the module's non-volatile EEPROM memory, which can then be plugged into another drive to download the configuration without needing a PC or software.
Can the Lenze EMZ9371BB1A Keypad XT be plugged in or removed while the drive is powered?
Yes, the EMZ9371BB1A supports hot-plug functionality. It can be safely inserted into or removed from the drive's front-panel multi-pin slot during active drive operation without interrupting drive performance.
Which Lenze drive series are compatible with the 00398400 Keypad XT?
The EMZ9371BB1A Keypad XT is compatible with Lenze 8200 vector frequency inverters, 8200 motec frequency inverters, 9300 servo inverters, and 9300 Servo PLC series.
What does fault code CE0 indicate on the EMZ9371BB1A display?
Fault code CE0 indicates a communication error or timeout between the drive and keypad. This is typically caused by a loose mechanical fit, poor contact in the front slot interface, or contaminated header pins.
Does the EMZ9371BB1A keypad require battery power to keep stored parameters?
No, stored parameter sets are saved in integrated non-volatile EEPROM memory, which retains data securely without requiring a battery backup.
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