Method for determining calibration cycles for a field device in a process automation system

摘要

The invention relates to a method for determining calibration cycles for a field device (FG1, FG2, FG3, FG4, FG5) in a system (A) of process automation, comprising: - Transmission of the process values and the further data of the field devices (FG1, ... , FG5) to a, in particular cloud-based, service platform (SP) by means of the higher-level unit (GW, SPS); - Creation of history data on the basis of the transmitted process values and the further data for each of the field devices (FG1, ..., FG5); - Establishing a comparison system (VS) based on the historical data, the service platform (SP) or an application running on the service platform (SP) determining which first process variable (P1) of a first one in the course of establishing the comparison system (VS) Sensor unit (SE1, ..., SE5 ') for a second process variable (P2) of a second sensor unit (SE1, ..., SE5') can act as a comparison variable; - Detecting the first process variable (P1) and the second process variable size (P2), constantly or at fixed times; - comparing the first process variable (P1) with the second process variable (P2) and determining a deviation of the second process variable (P2) from the first process variable (P1); and- creating a maintenance notification (WN) in the event that the second process variable (P2) deviates from the first process variable (P1) by a predetermined maximum value (ΔT).