Method for monitoring a plant of the automation technology

A method for monitoring a plant of the employing process automation technology, wherein at least one sensor unit and at least one actuator unit and one field detection unit are used in the plant, wherein the sensor unit and the actuator unit are in communication with a higher-level unit via a communication network, wherein the sensor unit transfers process values and status data to the higher-level unit, wherein the actuator unit transfers control variables and status data to the higher-level unit, and wherein the higher-level unit transmits operating telegrams to the sensor unit and to the actuator unit, wherein the method comprises the following method steps:

• acquiring and storing all data transmitted via the communication network, consisting of process values, control variables and status data, and operating telegrams by the field detection unit, and providing the data transmitted via the communication network and the operating telegrams with time stamps;
• temporally assigning the operating telegrams to the data transmitted via the communication network;
• and
• analyzing the assignment and creating an intervention system, wherein the intervention system contains plant states and interventions, wherein a plant state is created on the basis of transmitted data from the sensor unit and from the actuator unit, and wherein an intervention consists of at least one operating telegram following the transmitted data from the sensor unit and from the actuator unit.