I want to operate it once every hour.

Use the Interval (Timer tag).
At the moment the longest interval is 60 seconds long however if you use the Timer tag and the Counter tag together you can set the interval to one hour.
Set the Timer tag Interval setting to 60 seconds.
Next, set the Counter tag, 60 times to Up.
This way something happens only once every 60 times of 60 seconds, which makes an hour. Enabling you to operate something once every hour.