Abstract: In a method for automatically adjusting a bus-capable field device of process automation technology to the bus protocol utilized on the fieldbus, fieldbus telegrams are relayed to various fieldbus stacks. The fieldbus stack which properly processes the telegrams is selected for exchanging data with the fieldbus.

Abstract: A display for on-site visualization of conditions of an automated process is disclosed. It comprises a display controller which at least temporarily provides a state indication signal representing a constellation of states of at least two process data signals. At least one of the two process data signals is derived from a signal generated externally to the field device. The field device has a display element which responds to a change in the state indication signal with a significant change in its appearance, thus signaling the constellation of the states of the two process data signals in a visually perceptible manner. Therefore, the field device is particularly suited for on-site monitoring of entire plants or sections thereof by operating personnel.