SD250 Remote StartStop Speed Pot Ref Analogue Input

This set up is for using start/stop commands for the input terminals and speed reference for the drive by analogue input.

The SD250 series of variable speed drives are compact and easy to use, but you will need the supplied ‘Getting Started’ handbook to familiarize yourself with the necessary parameters screens that you require.

Firstly, wire and connect into the I/O terminals the required start/stop input and speed reference analogue input. The analogue shown here is a known 2/10 volt potentiometer also known as a speed pot. Once you have confirmed your wiring into the I/O terminals before power up, please ensure the motors are isolated from accidental starting.
On power up, as a good rule of thumb, it is a good idea to re-initialize the drive. This ensures the drive is back to its original factory default settings: parameter H-93.

Setting the Motor Nameplate into the VSD

Setting of the motor name plate is the first parameter to be added. This ensures the motor is protected correctly and the RPM is correct into the drive.
Be sure when entering parameters that you press Enter twice to save the changes correctly.

Changing Acceleration and Deceleration Rates to suit application

In these parameters you can change the acceleration and deceleration rate of your motor to suit your application.
Defaults here are:

  • acceleration five seconds and
  • deceleration ten seconds

 Change these if required.

Setting the Frequency mode Digital or Analogue Inputs

For your analogue input to control the speed of the motor, you will need to adjust the frequency mode. For the speed pot 0-10 volts, its number three. Enter this.

Now to confirm your analogue input is operating correctly, move down to the reference frequency by moving your speed pot. The frequency on your drive will move up and down. Your analogue input is now working correctly.

Scaling of the Analogue Input if required

If required scaling of your analogues are needed, these can be found in parameters I7 to I10.
Default settings here are:

  • I7: 0 volts
  • I8: 0 hertz
  • I9: 10volts
  • I10: 50 hertz.

If you are happy with your wiring to your I/O terminals and motor connections, refit all covers to the SD250 and your motor connections.

You may now start your drive by energizing the digital input to P1 forward run.

If you require further assistance, please contact us.