A food processing machine, such as a filling machine and/or twisting line for the manufacture of foods, particularly sausages, and a corresponding operating method, having at least one function module and at least one control section for controlling the corresponding function modules. Through at least one activation device, and after the input of an access authorization, at least one function module can be activated and/or one performance range from a plurality of possible performance ranges of at least one function module can be activated.