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description: Connecting controls in different modules and pages
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# Using Variables

#### What are variables: Variables are named containers into which any values can be written and read from other places.



To connect the LogicModule to the UserLivePanel in Depence, the system uses internal variable fields.

<figure><img src="https://content.gitbook.com/content/SJPsyh5CBOise9BtVNGO/blobs/kMcGod4Vm3BxuGk0Cb3z/image.png" alt=""><figcaption></figcaption></figure>

In this example, two digital inputs of a vNano/wec were read out and written to two variables.\
Variable 1 = IsLightOn \
Variable 2 = IsEnabled

Now two LED controls were placed on the UserLivePanel and each given the same variable name.

Thus, the state of the digital outputs in the LogicModule is now transferred to the LEDs on the UserLivePanel.



You can also use variables to exchange information between different LogicModule pages.



Furthermore, variables are suitable for displaying different texts on the UserLivePanel depending on the states in the LogicModule.
