Save a recipe

If there are recent changes in the PLC variables which the PLC wants to save into the active recipe, following steps will be taken to complete the process.

1. PLC raises save request by setting the SaveDataRequestPlc variable to TRUE.
2. HMI client reads this and saves all changes in an active temporary recipe.
3. HMI signals end of save operation by writing TRUE value to the SaveDataQuitePlc variable.
4. PLC recognizes this and removes the request.