Input device for a field device for the process instrumentation as well as a method for processing an input

摘要

Input device for a field device (7) for the process instrumentation having a plurality of keys (1, 2, 3) and having an evaluation device (4) for detecting a key operation, the evaluation device (4) is designed for this purpose, in the case of detection of a key operation to carry out a plausibility check, in which it is determined whether the combination of the keys (1, 2, 3) corresponds to an impermissible input, and upon determination of an impermissible input to indicate the fault condition of a disturbance,characterized in that a simultaneous actuation of all the keys (1, 2, 3) is predetermined as an impermissible input,that the keys (1, 2, 3) in each case a magnetic field sensor (9, 10, 11) is associated with each intended to produce a of the operating state of the respective key (1, 2, 3) dependent measurement signal (13, 14, 15) andthat the evaluation device (4), on which the measurement signals (13, 14, 15) are guided, is designed for this purpose, key operations on the basis of the measurement signals (13, 14, 15) to detect and upon determination of a simultaneous actuation of all the keys..