Arrangement comprising a valve of a process plant having different types of valves, wherein the valve comprises a valve control device, from which a valve data set allocated uniquely to a specific valve of the process plant can be read out, and an optical label, and comprising a mobile device which comprises an optical detection unit for detecting the optical label and is configured to generate a label data set from the image data detected by the optical detection unit, and the valve control device comprises a first wireless communication unit, the mobile device comprises a second wireless communication unit and the mobile device is configured to generate a data set group which comprises the label data set and the valve data set, characterised in that the first wireless communication unit can be connected to the second wireless communication unit for transmitting the valve data set to the mobile device, the valve comprises a sensor and the valve control device comprises a processing unit for detecting an operation state determined with the sensor and comprises a memory for storing an operation data set which represents the operation state and can be incorporated into the valve data set, the valve control device comprises an error recognition means and error data can be stored in the valve data set in an error memory of the valve control device, and characterised by a diagnostic device which is configured to process the error data, wherein the mobile device is configured to read out the detected operation state, retrieve the error data and communicate same to the diagnostic device. comprising a valve of a process plant having different types of valves, wherein the valve comprises a valve control device, from which a valve data set allocated uniquely to a specific valve of the process plant can be read out, and an optical label, and comprising a mobile device which comprises an optical detection unit for detecting the optical label and is configured to generate a label data set from the image data detected by the optical detection unit, and the valve control device comprises a first wireless communication unit, the mobile device comprises a second wireless communication unit and the mobile device is configured to generate a data set group which comprises the label data set and the valve data set, characterised in that the first wireless communication unit can be connected to the second wireless communication unit for transmitting the valve data set to the mobile device, the valve comprises a sensor and the valve control device comprises a processing unit for detecting an operation state determined with the sensor and comprises a memory for storing an operation data set which represents the operation state and can be incorporated into the valve data set, the valve control device comprises an error recognition means and error data can be stored in the valve data set in an error memory of the valve control device, and characterised by a diagnostic device which is configured to process the error data, wherein the mobile device is configured to read out the detected operation state, retrieve the error data and communicate same to the diagnostic device.