# Working with the execution control

The execution control is helpful for controlling the conditional execution of Program Organisation Units.

You can add an additional boolean input (EN) and an additional boolean output (ENO) to a POU.

If the value EN of the boolean input is TRUE, ENO is set to TRUE. The POU and the output variable will be executed.

If the value EN of the boolean input is FALSE, ENO is set to FALSE. The POU and the output variable will not be executed.

- Adding the execution control to a POU
- Deleting the execution control from a POU