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Drive Technology FAQ

All questions that apply to the field of drive technology are assigned to this category.

  1. ST300 Series | E4, what does this message mean and what can be done?

    If the error message E4 appears on the frequency inverter display, it indicates overcurrent during acceleration. Causes: The acceleration ramp is too […]
  2. ST300er | E5 – What does this message mean and what can be done?

    If the frequency inverter displays the error message E5, it indicates an overcurrent during braking. Causes: Acceleration is too high. The mains […]
  3. ST300 Series | E6 – What does this message mean and what can be done?

    If the error message E6 appears on the frequency converter display, it indicates an overcurrent during constant speed operation. Causes: The acceleration […]
  4. ST300 Series | E7 – What does this message mean, and what can be done?

    If the error message E7 appears on the frequency converter display, it indicates an overvoltage during acceleration. Causes: A disturbance occurred in […]
  5. ST300 Series | E8 – What does this message mean, and what can be done?

    If the error message E8 appears on the frequency converter display, it indicates an overvoltage during braking. Causes: • Disturbance in the […]
  6. ST300 Series | E9 – What does this message mean, and what can be done?

    If the error message E9 appears on the frequency converter display, it indicates an overvoltage during constant speed operation. Causes: • Disturbance […]
  7. ST300 Series | E10, what does this message mean, and what can be done?

    If the error message E10 appears on the frequency converter display, it indicates a DC bus undervoltage fault. Causes: The mains voltage […]
  8. ST300 Series | E11, what does this message mean, and what can be done?

    If the error message E11 appears on the frequency converter display, it indicates a motor overload. Causes: The mains voltage is too […]
  9. ST300 Series | E12, what does this message mean, and what can be done?

    If the error message E12 appears on the frequency converter display, it indicates an inverter overload. Causes: The acceleration ramp is too […]
  10. ST300 Series | E13, what does this message mean, and what can be done?

    If the error message E13 appears on the frequency converter display, it indicates a phase loss on the input side. Causes: Phase […]
  11. ST300 Series | E14, what does this message mean, and what can be done?

    If the error message E14 appears on the frequency converter display, it indicates a phase loss on the output side. Causes: Phase […]
  12. ST300 Series | E16, what does this message mean, and what can be done?

    If the error message E16 appears on the frequency converter display, it indicates overheating of the inverter module. Causes: The air duct […]
  13. ST300 Series | E17, what does this message mean, and what can be done?

    If the error message E17 appears on the frequency converter display, it indicates an external fault. Causes: A digital input terminal assigned […]
  14. ST300 Series | E18, what does this message mean, and what can be done?

    If the error message E18 appears on the frequency converter display, it indicates a Modbus communication error. Causes: Baud rate not correctly […]
  15. ST300 Series | E19, what does this message mean, and what can be done?

    If the error message E19 appears on the frequency converter display, it indicates a current detection error. Causes: Defective motor cable or […]
  16. ST300 Series | E20, what does this message mean, and what can be done?

    If the error message E20 appears on the frequency converter display, it indicates a motor auto-tuning error. Causes: The motor power does […]
  17. ST300 Series | E21, what does this message mean, and what can be done?

    If the error message E21 appears on the frequency converter display, it indicates an EEPROM error. Causes: Error reading/writing control parameters. The […]
  18. ST300 Series | E22, what does this message mean, and what can be done?

    If the error message E22 appears on the frequency converter display, it indicates a PID feedback offline error. Causes: PID feedback is […]
  19. ST300 Series | E23, what does this message mean, and what can be done?

    If the error message E23 appears on the frequency converter display, it indicates a brake unit error. Causes: A fault in the […]
  20. ST300 Series | E24, what does this message mean, and what can be done?

    If the error message E24 appears on the frequency converter display, it indicates that the runtime limit of the converter has been […]
  21. ST300 Series | E25, what does this message mean, and what can be done?

    If the error message E25 appears on the frequency converter display, it indicates an electronic overload error. Causes: The converter triggers an […]
  22. ST300 Series | E27, what does this message mean, and what can be done?

    If the error message E27 appears on the frequency converter display, it indicates a parameter upload error. Causes: The control panel cable […]
  23. ST300 Series | E28, what does this message mean, and what can be done?

    If the error message E28 appears on the frequency converter display, it indicates a parameter download error. Causes: The control panel cable […]
  24. ST300 Series | E32, what does this message mean, and what can be done?

    If the error message E32 appears on the frequency converter display, it indicates a Ground Fault 1. Causes: The output of the […]
  25. ST300 Series | E33, what does this message mean, and what can be done?

    If the error message E33 appears on the frequency converter display, it indicates a Ground Fault 2. Causes: The output of the […]
  26. ST300 Series | E34, what does this message mean, and what can be done?

    If the error message E34 appears on the frequency converter display, it indicates an error due to excessive speed deviation. Causes: The […]
  27. ST300 Series | E35, what does this message mean, and what can be done?

    If the error message E35 appears on the frequency converter display, it indicates a motor parameter setting error. Causes: The motor parameters […]
  28. ST300 Series | E36, what does this message mean, and what can be done?

    If the error message E36 appears on the frequency converter display, it indicates electronic underload detection. Causes: The converter triggers an underload […]
  29. ST300 Series | E40, what does this message mean, and what can be done?

    If the error message E40 appears on the frequency converter display, it indicates the activation of Safe Torque Off (STO). Causes: The […]
  30. ST300 Series | E41, what does this message mean, and what can be done?

    If the error message E41 appears on the frequency converter display, it indicates a fault in the safe circuit of channel H1. […]
  31. ST300 Series | E42, what does this message mean, and what can be done?

    If the error message E42 appears on the frequency converter display, it indicates a fault in the safe circuit of channel H2. […]
  32. ST300 Series | E43, what does this message mean, and what can be done?

    If the error message E43 appears on the frequency converter display, it indicates a fault in the safe channels H1 and H2. […]
  33. ST300 Series | E92, what does this message mean, and what can be done?

    If the error message E92 appears on the frequency converter display, it indicates that the threshold for the input voltage at analog […]
  34. ST300 Series | E93, what does this message mean, and what can be done?

    If the error message E93 appears on the frequency converter display, it indicates that the threshold for the input voltage at analog […]
  35. ST300 Series | E94, what does this message mean, and what can be done?

    If the error message E94 appears on the frequency converter display, it indicates that the threshold for the input voltage at analog […]
  36. ST300 | Whistling Noises from the Motor – What Can I Do?

    Wenn der Motor bei Verwendung eines Frequenzumrichters pfeifende Geräusche von sich gibt oder zu Vibrationen neigt, kann dies mit der Trägerfrequenz des […]
  37. ST300 | External Potentiometer – How to Connect It and Which Type Is Compatible?

    For connection as an external potentiometer to terminals AI1, +10V and GND, all potentiometers with a resistance of 1kΩ to 5kΩ and […]
  38. ST300 | Digital Inputs – How and What Can Be Connected?

    The digital inputs of the ST300 frequency inverter allow control via sensors, switches, PLCs, etc. Terminals S1 to S4 as well as […]
  39. ST300 | Forward, Reverse, Stop via Switches or Pushbuttons

    The ST300 frequency inverters have terminals S1 – S4, HDIA, which allow switching between forward and reverse operation via control signals or […]
  40. ST300 | Multiple Motors on One Frequency Inverter

    The following rules must be observed when operating multiple motors on a single frequency inverter: • The motors must have identical specifications […]
  41. ST300 | Adjusting Acceleration and Deceleration Ramps

    The acceleration and deceleration ramps on the ST300 can be set independently. A longer acceleration time reduces the inrush current and can […]
  42. ST300 | Limiting Inrush Current (e.g. for Fan Motors)

    To keep the inrush current lower for loads that require torque strongly dependent on frequency, various U/f curves are available. The different […]
  43. ST300 | Single-phase Motor

    Frequency inverters are designed for operation with a three-phase motor. These can be asynchronous or synchronous motors. They load the three phases […]
  44. ST300 | Initial commissioning – What do I need to consider (motor data)?

    Before commissioning a frequency inverter, the factory settings must be loaded via the menu. Afterwards, the rated motor data of the connected […]
  45. ST500 | Display parameters d0.09 and d0.10

    The display parameters d0.09 and d0.10 can display two different ranges, namely 0-10 and 0-20. The display switching is done via the […]
  46. ST600s | Err.64, what does this message mean, what can be done?

    If the error message Err.64 appears on the display of the frequency inverter, it is a timeout at the expansion card in […]
  47. ST600s | Err.63, what does this message mean, what can be done?

    If the error message Err.63 appears on the display of the frequency inverter, it is a timeout at the expansion card in […]
  48. ST600s | Err.62, what does this message mean, what can be done?

    If the error message Err.62 appears on the display of the frequency inverter, it is an error in the identification of the […]
  49. ST600s | Err.61, what does this message mean, what can be done?

    If the error message Err.61 appears on the display of the frequency inverter, it is an error in the identification of the […]
  50. ST600s | Err.60, what does this message mean, what can be done?

    If the error message Err.60 appears, it is an error in the identification of the expansion card in card slot 1. Causes: […]