Method for monitoring a process plant with a fieldbus of process automation technology

摘要

In a method for monitoring a process installation with a fieldbus FB of the process automation technology, via which multiple field devices F1-F4 with a process control unit PLC telegrams for process control in regular data exchange, the following process steps are performed: The transmitted over the fieldbus TR to the process control PLC telegrams from a monitoring application UA listened, which performs a check of the telegrams on data that are relevant to the monitoring application UA. Data relevant to the monitoring application UA is processed as actual values in a process model application that is part of the monitoring application. If a significant deviation between the setpoint and actual values is detected, an error signal is generated.