# Logic Gate

> Symcon documentation · English · generated on 2026-09-26  
> Index: https://www.symcon.de/en/llms.txt

Source: https://www.symcon.de/en/service/documentation/module-reference/logic/logic-gate/

_Requires Symcon >= 5.0_

This module enables the determination of logical connection between several variables. Here, the Boolean interpretation of the input variables is used.

### functional scope
- Determining the logical relationship of variable values
- Supported operations:
  - OR
  - AND
  - NOR
  - NAND
- Output is kept up to date and is updated as soon as one of the input variables changes

### software installation
- Via the [Module Store](https://www.symcon.de/en/service/documentation/components/management-console/module-store/) install the 'Logic Gate' module.

### Setting up the instances in IP-Symcon
- Under "Add instance" the 'Logik Gate' module is listed under the manufacturer '(Other)'
- At 'Calculation' select the desired operation
- In the list 'Input' select the desired input variables
  - 'Invert' can be activated to negate the input value of this variable
  - If a non-Boolean variable is selected, it will be interpreted as a boolean value, e.g. 0 as false

### status variables
The status variable "output" contains the current result of the logical operation

### Visualization
The current output is displayed.