Method and device for determining perturbations in the functioning of an industrial process controlled by a set of relays

摘要

The device comprises inputs intended to be connected to the particular points in the sequence to be monitored; means 45 for combining the signals from the said inputs into a combination signal intended to change state when the perturbation occurs; means 13 for sampling and recording the signals appearing at the said inputs until the state of the perturbation combination signal changes; and means 14 for off-line reading of the recordings in order to determine the particular input which is causing the perturbation. <IMAGE>