Abstract: In a method for operating an internal combustion engine having a plurality of combustion chambers, gaseous fuel is supplied by means of an injection from a fuel rail and via a fuel injector assigned to a particular combustion chamber, and gaseous fuel is supplied to the fuel rail substantially continuously from a fuel supply system. The method includes the following steps: ascertaining, within at least one operating cycle, the pressure drops of the pressure in the fuel rail that respectively occur during an injection into a combustion chamber; ascertaining the open durations, assigned to the respective pressure drop, of the corresponding fuel injector; ascertaining the total duration of the operating cycle; ascertaining respective mass indicators from the ascertained pressure drops, the ascertained open durations and the ascertained total duration.

Abstract: Local technology modules automatically execute given functions as part of process automation. Each technology module has a memory storing module-specific information about the respective function of the technology module and its tie-in to a measuring point, open- and closed-loop control system. During an initialization phase, this information is transmitted to a central communication device, where it is stored for access by an operator communication and monitoring device. It can thus automatically add the information to its operator communication and monitoring interface.