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Drive Technology FAQ

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

  1. 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 […]
  2. 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 […]
  3. 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 […]
  4. 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 […]
  5. 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 […]
  6. 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 […]
  7. 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 […]
  8. 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 […]
  9. 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 […]
  10. 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 […]
  11. 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. […]
  12. 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 […]
  13. 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 […]
  14. 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. […]
  15. 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 […]
  16. 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 […]
  17. 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 […]
  18. 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 […]
  19. 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 […]
  20. 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 […]
  21. 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 […]
  22. 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 […]
  23. 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 […]
  24. 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 = […]
  25. 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 […]
  26. 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 […]
  27. ST9000 | Analog output signals – for example, for motor voltage, motor current, motor power

    With the inverter ST9000, it is possible to display 15 different measured variables via the terminals DA1 and DA2, one for each […]
  28. ST9000 | DC braking to hold engine into position

    With the ST9000 frequency inverter, it is possible to vary the braking behaviour with a superimposed DC braking voltage, so as to […]
  29. ST9000 | Change display settings (r/min)

    To display a different value during the process on the display, the value of F6.01 must be changed. This parameter is specified […]
  30. ST9000 | Forward, reverse, stop – Which parameter and terminal assignment?

    The frequency inverters ST9000 have the clamps DI1, DI2 and DI3 with which the inverter can be switched via control signals or simple […]
  31. ST9000 | External Potentiometer – How to connect it and which one is compatible?

    An external potentiometer, which is connected to AI1, +10V and GND will have a resistance of 1kΩ and a power of 2W. For […]
  32. ST9000 | Pump Control

    To use the frequency inverter as a pump control, for example at a pressure sensor for the “actual pressure”, these parameters are […]