4072

“Inconsistent use of an action identifier in FB type (‘<name>’) and instance (‘<name>’).”

You have defined two actions of a function block fb: e.g. a1 and a2, but in the call of one of the actions in the FBD you are using a type (string within the box, e.g. fb.a1 different to that used in the instance-name (e.g. inst.a2, above box). Correct the name correspondingly into the name of the desired action.