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Drive Technology FAQ

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

  1. ST500 | Initial operation – What should I watch for (motor data)?

    Before a initial operation of a frequency inverter you should absolutely check that the factory settings are loaded y0.00 = 3. Then the […]
  2. ST500 | Power Class – Which Model Do I Need?

    Normally, the power class of the inverter should be the same as the motor’s. With heavy-duty starting motors however, it may be […]
  3. ST500 | Minimum Frequency for External Potentiometer

    To have the external potentiometer during operation with minimun frequency in the left hand position, the parameters have to be adjusted. On […]
  4. ST500 | Activate Panel Potentiometer – Control Motor Frequency via Dial

    The frequency inverter ST500 has a potentiometer on the panel, which can be used to adjust the motor frequency. For this purpose […]
  5. ST500 | Frequency converter as pump control – Parameter list for pressure control

    Note: Unchanged factory settings (except motor parameters) are assumed. Programmed values Parameter Value Functional description F0.03 8 PID control F0.11 4 4: […]
  6. ST500 | Program Sequences – PLC Programming

    With the frequency inverter ST500 it is possible to let run program sequences timed. A site of operation would be a grinding […]
  7. ST500 | Multi-speed function – Simple frequency or change of rotating direction

    Multi-speed Function: Speed1=50Hz, Speed2=40Hz and Speed3=30Hz   F0.03 = 6 frequency control on multi-speed F0.11 = 1 regulator release on terminal clamps […]
  8. ST500 | Keep last frequency after resetting

    To get back the frequency, which has been adjusted by buttons, even after a power loss, you only need to change one […]
  9. ST500 | Forward, reverse, stop – Which parameter and terminal assignment?

    The frequency inverters ST500 have the clamps DI1, DI2 and DI3 with which the inverter can be switched via control signals or simple […]
  10. ST500 | Target frequency over 320Hz

    To set a target frequency greater than 320Hz, it is necessary to make an resolution adjustment of the target frequency F0.02 = […]
  11. ST500 | Forward, reverse, stop with buttons

    The frequency inverter ST500 uses the terminals DI1, DI2 and DI3 which with the inverter can be switched via control pulses or […]
  12. ST500 | Forward and reverse with panel potentiometer

    To control the inverter with the panel potentiometer in both directions the following parameters have to be changed. F0.03 4 frequency control […]
  13. ST500 | Factory Settings – How do I reset the inverter?

    To reset the frequency inverter ST500 to factory settings, the parameter must be y0.00 = 1 or y0.00 =3 . In y0.00 =1 […]
  14. ST500 | Wiring diagram

    In order to always wire the frequency inverter correctly, you will find the connection diagrams of inverters of all power classes here. […]
  15. ST500 | Warning light 230V e.g. fault case – How to connect?

    A warning lamp with 230V must be supplied externally. The warning lamp and the mains voltage are then connected in series with […]
  16. ST500 | Parameter transmission to the control unit – What do I have to do?

    To transfer all parameters stored in the frequency inverter to the memory location of the control unit, proceed as follows: Go to […]
  17. ST500 | Skip frequency – skip a critical frequency what is to be parameterised here?

    There are many applications in which certain operating frequencies lead to resonant vibrations of the motor. In order to pass through these […]
  18. ST500 | Parameterisation example: External potentiometer, switch ON/OFF and change of direction

    This example describes the operation of a three-phase motor with a Sourcetronic frequency inverter of the ST500 series. The speed (frequency) is […]
  19. ST500 | Remote control frequency inverter serially with Modbus RS485

    The communication between the control unit and the frequency inverter equipped with RS485 must run in RTU mode. In this case, the […]
  20. ST500 | Is it possible to operate a three-phase asynchronous motor on a single-phase mains under speed control?

    Yes, this works wonderfully with the Sourcetronic frequency converter of the ST500 230V series. At the output of the frequency converter, 3 […]
  21. ST500 | Change display (rpm)

    In order to have another value displayed by the frequency inverter during the process, e.g. the output voltage or the current, parameter […]
  22. ST500 | Switch on torque boost

    If the motor has too little torque in the lower speed range when using V/f operation, you can improve this by using […]
  23. ST500 | Automatic start after power up – How does the inverter automatically start forward after power up?

    The following settings must be parameterised so that the frequency inverter automatically goes into forward or reverse operation after being switched on […]
  24. ST500 | Analogue sensors – How are they connected and parameterised?

    There are a variety of sensors (e.g. pressure sensors, flow sensors, temperature sensors, …) that output their measurement results in the form […]
  25. ST500 | Control of the frequency inverter via an external PLC

    You can switch the digital inputs of the frequency inverter via the active outputs of an external PLC. To do this, first […]
  26. ST500 | Connection of a PT100 temperature sensor

    It is also possible to connect a PT100 temperature sensor to an ST500 frequency converter. This is a good way to protect […]
  27. ST500 | I need a free stop or emergency stop for an emergency stop button – What do I have to do?

    The frequency inverters of the ST500 series have terminals DI1 to DI6 or DI8, with which the inverter can be switched to […]
  28. ST9000 | Braking and acceleration times

    With ST9000 frequency inverter it is possible to retrieve various functions via the terminals DI1 to DI8. One of them is to […]
  29. ST9000 | Factory Settings – How do I reset the inverter?

    To reset the frequency inverter ST9000 to factory settings, the parameter must be y0.00 = 1 or y0.00 =3 . In y0.00 =1 […]
  30. ST500 | Programming Keys

    How can the buttons on the control panel be reprogrammed? Example: How can the direction reversal be brought to a key? QUICK […]
  31. ST500 | Switching from AI1 to AI2

    If a potentiometer or potentiometer and a sensor are used, how does the switching from AI1 to AI2 work? Configure the two […]
  32. ST500 | ST®Drive

    Error message: “No device could be found”. The appearance in the device manager only means that the RS485 adapter was found. Devices […]
  33. ST500 | Permanent magnet synchronous motor

    Permanent magnet synchronous motors can be operated by the ST500 frequency inverter, but only if a rotation or incremental encoder is present […]
  34. ST500 | Start with “controller enable”

    What must be set so that the inverter starts running immediately when it receives power? See example 2 for E3.06 on page […]
  35. ST500 | Single-phase motor

    Frequency converters are designed for operation with a three-phase motor. These are asynchronous or synchronous motors. They load the three phases symmetrically. […]
  36. ST500 | EMC filter installation

    How is the mains filter connected? See the picture at the beginning of chapter 10 in the instruction manual. Back to the […]
  37. ST500 | When do you need a mains filter?

    When is a mains filter needed and when can it be omitted? In any case, when other devices are disturbed. Back to […]
  38. ST9000 | Wiring diagram

    In order to always wire the frequency inverter correctly, you will find the connection diagrams of inverters of all power classes here. […]
  39. ST9000 | Initial operation – What should I watch for (motor data)?

    Before a initial operation of a frequency inverter you should absolutely check that the factory settings are loaded y0.00 = 3. Then the […]
  40. ST9000 | Forward, reverse, stop with buttons

    The frequency inverter ST9000 uses the terminals DI1, DI2 and DI3 which with the inverter can be switched via control pulses or […]
  41. ST9000 | Limit starting current e.g. for fan motors

    To keep the starting current low, there are various F / V characteristics. The different characteristics must be chosen using F4.00. For […]
  42. ST9000 | Keep last frequency after resetting

    To get back the frequency, which has been adjusted by buttons, even after a power loss, you only need to change one […]
  43. ST9000 | Forward and reverse with panel potentiometer

    To control the inverter with the panel potentiometer in both directions the following parameters have to be changed. F0.03 = 4 F1.44 […]
  44. ST9000 | Power Class – Which Model Do I Need?

    Normally, the power class of the inverter should be the same as the motor’s. With heavy-duty starting motors however, it may be […]
  45. ST9000 | Minimum Frequency for External Potentiometer

    To have the external potentiometer during operation with minimun frequency in the left hand position, the parameters have to be adjusted. On […]
  46. ST9000 | Introduction to Operating: By Changing the Target Frequency

    To change the target frequency of F0.19 = 50.00Hz (the default factory setting) to e.g. F0.19 = 250.00Hz, proceed as follows: In […]
  47. ST9000 | Activate Panel Potentiometer – Control Motor Frequency via Dial

    The frequency inverter ST9000 has a potentiometer on the panel, which can be used to adjust the motor frequency. For this purpose […]
  48. ST9000 | Target frequency over 320Hz

    To set a target frequency greater than 320Hz, it is necessary to make an resolution adjustment of the target frequency F0.02 = […]
  49. ST9000 | Program Sequences – PLC Programming

    With the frequency inverter ST9000 it is possible to let run program sequences timed. A site of operation would be a grinding […]
  50. ST9000 | Multi-speed function – Simple frequency or change of rotating direction

    Multi-speed Function: Speed1=50Hz, Speed2=40Hz and Speed3=30Hz   F0.03 = 6 frequency control on multi-speed F0.11 = 1 regulator release on terminal clamps […]