You can move any connected tubular motor to any position, provided that the runtime has been set once. The runtime is the time required by the tubular motor to open the shutter completely. This time is used as a reference for calculating all positions. With the Troll Basis DuoFern, you have two options for setting this runtime.
Option 1: You measure the time when opening the shutter using a stopwatch and enter this in the HomePilot under Configuration > Device settings > Runtime > the runtime.
Option 2: You close the roller shutter completely, then press and hold the Up key and the Clock key simultaneously. After approx. 4 seconds, the tube motor starts to open the roller shutter. Keep the keys pressed until the tube motor stops via the limit switch, wait another two seconds and then release the keys. The running time has been measured and saved.