The present disclosure relates to a method for starting up or servicing a field device: reading unique identification information assigned to the field device via a static code by means of a reading and/or operating tool; optically reading diagnostic information stored in the field device and which relates to at least one current and/or past event assigned to the field device, via a dynamic code generated by the field device by means of the reading and/or operating tool; transmitting the identification and diagnostic information from the reading and/or operating tool to a cloud-based service platform, transmitting device and/or application-specific information for remedying the event characterized by the diagnostic information from the cloud-based service platform to the reading and/or operating tool, and eliminating the event or effects of the event using the transmitted device-specific and/or application-specific information.