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Drive Technology FAQ

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

  1. ST130 | Multiple Speeds

    With the multiple speed setting you can store up to 16 different frequencies and recall them at any time via a binary […]
  2. ST130 | Display Settings

    If you do not want the frequency to be shown in your display, but a different technical value, this is also possible. […]
  3. ST130 | Power supply and motor. Where are these connected?

    The inverter has a flap in the upper area. This must first be opened. L and N of the power supply (230V) […]
  4. ST130 | Acceleration- Braking time – How do I set this?

    To adjust the start ramp/stop ramp of the ST130 inverter, the following parameters must be set: F0.05 Length of the start ramp […]
  5. ST130 | Change introduction to operation using the target frequency

    To change the target frequency from F0.08 = 50.00Hz (factory setting) to e.g. F0.08 = 25.00Hz, proceed as follows In monitoring mode […]
  6. ST130 | For an emergency stop button I need a free stop – What do I have to do?

    The ST130 frequency inverter has the terminals DI1, DI2 and DI3 with which the inverter can be switched to a free stop […]
  7. ST130 | Parameter transfer to the control panel – 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 […]
  8. ST130 | Warning light 230 V e.g. fault case – How to connect?

    A warning lamp with 230 V must be supplied externally. The warning lamp and the frequency converter are then connected in series. […]
  9. ST130 | Operation with minimum frequency – What do I have to do?

    Should the motor continue to run at a certain minimum frequency? Set F0.11 (lower frequency limit) between 0 Hz and the set […]
  10. ST130 | Power Class – Which model do I need?

    As a rule, the power class of the inverter should correspond to that of the motor. In the case of heavy starting […]
  11. ST130 | Initial commissioning – What do I have to observe (motor data)?

    Before commissioning a frequency inverter, it is essential that the factory settings are loaded y0.00 = 1. Then the rated motor data […]
  12. ST130 | Factory settings – How do I reset the inverter?

    To reset the ST130 frequency inverters to their factory settings, parameter y0.00 = 1 must be set. With 1, all parameters are […]
  13. ST130 | Forward, Reverse, Stop – Which parameters and terminal assignment?

    The ST130 frequency inverters have terminals DI1, DI2 and DI3 with which the inverters can be switched to forward and reverse operation […]
  14. ST130 | External Potentiometer – How is it connected and which is compatible?

    As external potentiometer, which is connected to the terminals AI1, +10V and GND, all with a resistor of 1kΩ and a power […]
  15. ST130 | Digital inputs – What can be connected and how?

    The digital inputs of the ST130 enable the inverter to be controlled by means of sensors, switches, a PLC etc. The terminals […]
  16. ST130 | Analog sensors – How are they connected and parameterized?

    There is a wide range of sensors (e.g. pressure sensors, flow, temperature, …) that output their measurement results in the form of […]
  17. ST500 | Power: Motor – Frequency converter

    Question: Can a 5.5kW motor be operated with a 7.5kW inverter? Yes, a 5.5 kW motor can be operated with a 7.5 […]
  18. ST500 | When should I use an EMC output filter with my frequency inverter?

    The AC drives have unfiltered outputs. For the majority of applications this gives satisfactory performance, however for a small number of applications […]
  19. ST500 | Operation with minimum frequency – What do I have to do?

    Should the motor continue to run at a certain minimum frequency? Set F0.23 (frequency lower limit) between 0 Hz and the set […]
  20. ST500 | How do I commission the ST500 frequency inverter?

    To parameterize the frequency inverter ST500, you can follow the following flow chart (click on the picture for a higher resolution):   […]
  21. ST500 | Analog output signals – for example, for motor voltage, motor current, motor power

    With the inverter ST500, it is possible to display 15 different measured variables via the terminals DA1 and DA2, one for each […]
  22. ST500 | Braking and acceleration times

    With ST500 frequency inverter it is possible to retrieve various functions via the terminals DI1 to DI8. One of them is to […]
  23. ST500 | 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 […]
  24. ST500 | 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 […]
  25. ST500 | DC braking to hold engine into position

    With the ST500 frequency inverter, it is possible to vary the braking behaviour with a superimposed DC braking voltage, so as to […]
  26. ST500 | 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 […]
  27. 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 […]
  28. 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 […]
  29. 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 […]
  30. 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 […]
  31. 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: […]
  32. 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 […]
  33. 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 […]
  34. 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 […]
  35. 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 […]
  36. 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 = […]
  37. 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 […]
  38. 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 […]
  39. 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 […]
  40. 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. […]
  41. 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 […]
  42. 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 […]
  43. 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 […]
  44. 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 […]
  45. 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 […]
  46. 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 […]
  47. 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 […]
  48. 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 […]
  49. 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 […]
  50. 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 […]