Abstract: A method for wireless data transmission between first and second transmission participants, wherein for wireless data transmission between the first and second participants alternately a first protocol and a second protocol are used, wherein the first protocol serves for unidirectional data transmission and the second protocol for bidirectional data transmission.

Abstract: A method for servicing a field device of process automation technology. The data exchanged between the field device and a servicing program is by means of at least one protocol, which has basic commands, via which basic functions of the field device can be invoked. Each field device which is compatible with the protocol has these basic functions available to it, and wherein only basic commands of the protocol are used to transfer data between the servicing program and the field device.

Abstract: A method for servicing a field device having a first wireless transmission module, preferably a transponder. An adapter is provided, which has a corresponding second wireless transmission module, preferably a reading device, for querying the transponder. The field device has, furthermore, a first communication interface for communication via a fieldbus, preferably a wired fieldbus, wherein the adapter has a second communication interface likewise for communication via the fieldbus, preferably a wired fieldbus. Data stored in a memory unit of the field device are wirelessly retrieved and transmitted to the adapter by means of the first transmission module and by means of the second transmission module, wherein the adapter is connected with a service device, and wherein by means of the retrieved data a connection is established between the field device and the service device via the field bus.

Abstract: A method for wireless data transmission between first and second transmission participants, wherein for wireless data transmission between the first and second participants alternately a first protocol and a second protocol are used, wherein the first protocol serves for unidirectional data transmission and the second protocol for bidirectional data transmission.

Abstract: A method for servicing a field device of process automation technology. The data exchanged between the field device and a servicing program is by means of at least one protocol, which has basic commands, via which basic functions of the field device can be invoked. Each field device which is compatible with the protocol has these basic functions available to it, and wherein only basic commands of the protocol are used to transfer data between the servicing program and the field device.