Semantic Error (SEM1191): The specified function block type '...' does not match the type '...' of the already defined function block instance '...'.
In the 'Variables' table of an FBD/LD POU, the data type of an FB instance declaration does not match the function block type which is actually inserted in the code.
The declaration was typed incorrectly or it was changed afterwards, for example, after creating the instance name using the 'Create New Function Block Instance' item selected from the FB's context menu in the graphical code.
Error example: TOF declaration expected, TON declaration found.
