The application example is a position control for the inlet gate of a dam using the SSI absolute encoder and Modicon X80 SSI interface module.
This system has an axis equipped with a drive for positioning the gate within the Open and the Close limits, in order to open, partially open or close the door for water inlet management.
The position of the gate is managed by a drive, and this drive is controlled with 3 buttons:
Open
This button commands the drive to open the gate (Motor+)
Close
This button commands the drive to close the gate (Motor-)
Stop
This button commands the drive to stop and activates the drive brake (Brake)
The position of the gate is measured with an SSI absolute encoder.
The encoder data range of SSI absolute encoder is calibrated and scaled to the distance between the Open and the Close limits.
When the gate moves up or down, the SSI encoder installed at the gearbox shaft then translates the position into its encoder data before sending it to SSI interface module for position supervision and control.
