Controlling Smart Ikea Blinds via NR

Hi folks,
I bought a IKEA Tradfri Fyrtur blackout blind recently. I'm running HASS.IO and access the blind via deConz software. Im curious how I can implement the shutter in my NR Automations.
For example: I have the up/down switch which comes with the shutter. I get the Deconz events in my debug node. But I have no clue how the message has to be configured to open or close the shutter. What I've done so far, is a Deconz in-node and a subsequent switch node, which filters the events to a up und a down outlet.
Now I need a function node to tell the shutter what to do, I guess. Can you help me with that?