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