Method and Control System for Technical Plants

A method for operating a control system for a technical plant including at least one operator station server and at least one operator station client, a data model being implemented on the at least one operator station server and the at least one operator station client including a display unit and a control unit, the method comprising:

• a) transmitting visualization information 5 representing the data model to the display unit of the at least one operator station client by the at least one operator station server;
• b) generating, by the display unit of the at least one operator station client, a graphical presentation of the received visualization information for an operator of the control system;
• c) receiving operator commands to change the graphical presentation in the display unit, and forwarding said received operator commands to the control unit by the display unit;
• d) receiving the forwarded operator commands from the display unit by the control unit;
• e) generating revised visualization information from the received operator commands and directly transmitting the revised visualization information to the display unit by the control unit to adjust the graphical presentation of the display unit;
• f) generating adjustment commands from the received commands and transmitting the generated adjustment commands directly to the data model on the at least one operator station server by the control unit such that the operator station server adjusts the data model in response to the operator commands;
• g) generating, by the display unit, a checksum specific to the current graphical presentation after the display unit has received the revised visualization information from the control unit and has adjusted the graphical presentation accordingly;
• i) generating, by the operator station server, a checksum specific to the current data model after the operator station server has received the adjustment commands from the control unit and has then adjusted the data model accordingly;
• j) transferring the checksum from the at least one operator station server to the display unit;
• k) comparing the checksum generated by the display unit with the checksum generated by the operator station server to detect any inconsistency between the graphical presentation of the display unit and the data model on the at least one operator station server;
• l) requesting visualization information representing the current data model from the at least one operator station server by the display unit in an event of inconsistency between the compared checksums;
• m) transferring the visualization information representing the current data model from the at least one operator station server to the display unit and graphically presenting the visualization information.