Method for operating an automation technology facility

A method for operating an automation technology facility in which at least one field device is used, the method including:

• providing a first and a second gateway including a first communication interface, respectively;
• connecting the first gateway via a first communication network to the field device using the first communication interface;
• connecting the second gateway via a second communication network to the field device using the second communication interface, wherein the first communication network and the second communication network are operating in parallel;
• connecting the first and the second gateway to an operating unit;
• connecting the first communication network and the second communication network to a control room of the automation technology facility;
• establishing a communication connection by the control room for communication with the first communication network or the second communication network;
• and
• switching over to a previous communication network by the control room and establishing a communication connection therewith if a problem is detected in a previous communication connection;
• wherein communication access to the first gateway is realized in a control unit via a first driver in the control unit;
• wherein communication access to the second gateway is realized in the control unit via a second driver in the control unit;
• wherein the control unit continuously analyses the first communication network and the second communication network and, in the event of a control room switchover, switches over to the gateway of that network which actively has a communication connection with the control room;
• and
• wherein the gateways are operated in a listener mode for detecting the switching over of the control room, in which listener mode a plurality of gateways listen to telegrams transmitted via the respective communication network, wherein no telegrams are received via the respective inactive communication network over a predefined time period in the event of a switching over of the control room.