Method for monitoring a process system having a field bus in the process automation technology

摘要

A method for monitoring a process plant having a fieldbus of process automation technology, via which a number of field devices exchange with a process control unit PLC telegrams in regular data traffic for process control. The following method steps are executed: telegrams transmitted via the fieldbus to the process control are tapped by a monitoring application, which performs a testing of the telegrams for data relevant for the monitoring application; data relevant for the monitoring application are processed as actual values in a process modeling application, which is part of the monitoring application; and when a significant deviation is determined between desired and actual values, an error signal is generated.

主权项

1. A method for monitoring a process plant having a fieldbus of process automation technology, via which a plurality of field devices exchange with a process control unit telegrams in regular data traffic for process control, having further a monitoring unit, which is connected to the fieldbus and separate from the process control unit, wherein a monitoring application runs in the monitoring unit and the monitoring unit via the monitoring application performs the following:
tapping of all regular data traffic telegrams, which are exchanged between the plurality of field devices and the process control unit via the fieldbus testing the regular data telegrams for data relevant for the monitoring application, in order to obtain the data needed for monitoring the process plant; processing the data relevant for the monitoring application as actual values in a process modeling application that is part of the monitoring application; and generating an error signal when the process in the process plant is not running properly by way of the process modeling application that determines a deviation between desired values and actual values by comparing the desired-values and the actual-values.