In smaller greenhouses, a manual program opened and closed yourself could possibly be installed. These work simplest when the screen material is supported by a monitor system.
Start time – when each morning will the display system start operation
Stop period – when in the afternoon will the display system stop operation
Light level – in what light intensity will the screen end up being activated either to open or close
Maximum/minimum temperature – what exactly are the limitations of temperature desired
Maximum/minimum humidity – What exactly are the limitations of humidity desired
Gap positions – this pieces the percent open or close position under different circumstances such as in early stages a winter early morning to reduce thermal shock or during the summer to provide better shading. The gap techniques and speed of motion can be controlled in a few systems.
Time delay – below changeable weather conditions this avoids frequent opening and closing
Wind speed – To reduce temperature loss, the screen could be closed early below high wind speed conditions
Snow detection – this may open the display and turn on the heat when it starts to snow.
The typical system uses nylon monofilament or stainless cables to support the screen material. The screen material can possibly rest along with the 
network of cables or become suspended by hooks from the cables. A gearmotor powers a drum or rack and pinion that techniques the industry leading of the screen material. Control is either with a manual switch or electronic controller.
Based on the over, the grower must enter the following parameters in to the controller:
A weather station is needed to provide Motor Gearboxes For Greenhouse outdoor light level, temperature, humidity, wind and rain or snow conditions.