‘Extras’ ‘Properties…’ in CFC

Constant input parameters (VAR_INPUT CONSTANT) from ‘Project’ ‘Project info’ and Function Block are not shown directly in the continuous function chart editor. These can be shown and their value can be changed when one selects the trunk of the block in question and then selects the command ‘Extras’ ‘Properties’ or simply double clicks on the trunk. The ‘Edit parameters’ dialog opens:

The values of the constant input parameter (VAR_INPUT CONSTANT) can be changed. Here it is necessary to mark the parameter value in the column Value. Another mouse click or pressing on the space bar allows this to be edited. Confirmation of the change to the value is made by pressing the <Enter> key or pressing <Escape> rejects the changes. The button ‘OK’ stores all of the changes which were made.

Note

This functionality and the associated declaration of variables with keyword “VAR_INPUT CONSTANT” is only of impact for the CFC editor. In the FBD editor always all INPUT variables will be displayed at a box, no matter whether declared as VAR_INPUT or VAR_INPUT CONSTANT. Also for text editors this does not make any difference.