Patent ID: 8700914

Claim:
A method for changing safety-relevant data for a control device comprising the steps of: receiving, from a user, safety-relevant data on a data processing installation; displaying the safety-relevant data that is received from the user in a first form during the receiving; establishing a first checksum for the safety-relevant data; storing the safety-relevant data and the first checksum in a memory in at least one data record on the data processing installation; reading back the safety-relevant data from the memory in the data processing installation; comparing the received safety-relevant data and the read back safety-relevant data by displaying the read back safety-relevant data to the user in a second form that differs from the first form and the user checking for an error present in the safety-relevant data that was input by the user during the receiving on the data processing installation; based on establishment of the first checksum establishing a second checksum upon a determination by the user, as a result of the comparing, that the received safety-relevant data is identical to the read back safety-relevant data and is absent of any errors input by the user during the receiving; and storing the second checksum in the at least one data record so as to provide an indication in the at least one data record that the at least one data record has been checked by the user prior to the at least one data record being activated on the control device.