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    Applications Library

Note: The descriptions that follow offer links allowing access to the corresponding application.

If Zelio Soft 2 software is installed, a click on the link will open the program. You may then select simulation mode (1) and start the module (RUN) (2).


Floating pop-ups are available to change and view the input-output status. To view them or mask them, use the icon bar at the bottom of the screen:


1 Applications in Ladder language



The owner of a greenhouse would like to acquire an installation to manage the opening and closing of the ventilation window panes located on the greenhouse roof.

The greenhouse has two window panes to provide ventilation. The opening of these window panes is controlled by a motor and 2 sensors that indicate whether the window panes are open or closed:


During the day, the window panes open to ventilate the structure from 12:00 to 15:00, at the time of day when, in principle, the temperature is the highest. However, if the temperature is less than 10°C, the window panes do not open, or when they are already open, they close.

In addition, the window panes open during the day when the temperature reaches 25°C. If the temperature falls below 25 °C, the window panes must close again.

Finally, at night, the window panes remain closed regardless of the temperature.

  Summary diagram:


Description of the inputs/ouputs: INPUTS:


The temperature is supplied by a sensor with output voltage of 0 to 10 V.

Model Required:

Zelio Logic with clock and analog inputs.

SR2 B121 BD (24 V DC) ou SR2 B121 JD (12 V DC) par exemple.

Program Description:

3 time ranges are used:

-Range 1: Night, from 21:00 to 07:00

-Range 2: Daytime, from 7:00 to 12:00 a.m. and from 3:00 to 9:00 p.m.

-Range 3: Noon, from 12:00 to 15:00