# ID 40101

FB-error: Only one instance of the function block is allowed in PLC application.
Description | There are function blocks that may only have one instance occurring in a PLC application in order to ensure data consistency. If several instances of this function block were created and called in a PLC application, the first instance called is not indicated with this error message. However, all the other instances occurring in the application sequences are.
Response | Class | - | The instance of the function block indicating this error message is only called but not exited immediately. It neither acts on the PLC application nor on the motion controller.
Solution | Class | - | Please contact your motion control supplier.
Error type | -