Semantic Warning (SEM2013): The parameters of function block '...' have changed in definition.
The formal parameters of a function block POU which is already used in an FBD/LD code worksheet have been changed but the POU call (i.e., block icon) has not yet been updated in the FBD/LD code.
To update the POU call, right-click the POU name in the graphical block icon and select 'Update Function / Function Block' from the context menu. The block icon is updated according to the new formal parameter definition. If parameters have been added or deleted, the size of the block icon is automatically adapted. Connecting lines are re-routed automatically or, if necessary, substituted by auto-connectors.
This is a warning message to inform you about that important issue. Check the reason for this warning. If it is intended, no corrections are required as reaction to this message.