Procedure designed to operate a system used in automation engineering in which at least one field device (FG1, FG2) is used, wherein a first and a second gateway (GW1, GW2) are provided, wherein said gateways each have a first communication interface and a second communication interface, wherein the first gateway is connected to the field device (FG1, FG2) by means of the first communication interface via a first communication network, wherein the second gateway is connected to the field device (FG1, FG2) by means of the first communication interface via a second communication network, which is redundant in relation to the first communication network, and connected in parallel with the first communication network wherein the first and the second gateway are each connected by means of the second communication interface to an operating unit for monitoring and/or operating the field device (FG1, FG2), wherein communication access to the first gateway is implemented in the operating unit via a first driver in the operating unit, and wherein communication access to the second gateway is implemented in the operating unit via a second driver in the operating unit, characterized in that the first communication network and the second communication network are connected to a control station of the system, the control station establishes a communication connection either with the first communication network or with the second communication network and communicates, the control station switches to the other communication network (KN1, KN2) and establishes a communication connection with it if a problem with the previous communication connection is detected, and the operating unit constantly analyzes the first and the second communication network (KN1, KN2) and, if the control station switches, the switch is to the gateway (GW1, GW2) of the network that has an active communication connection with the control station. wherein a first and a second gateway (GW1, GW2) are provided, wherein said gateways each have a first communication interface and a second communication interface, wherein the first gateway is connected to the field device (FG1, FG2) by means of the first communication interface via a first communication network, wherein the second gateway is connected to the field device (FG1, FG2) by means of the first communication interface via a second communication network, which is redundant in relation to the first communication network, and connected in parallel with the first communication network wherein the first and the second gateway are each connected by means of the second communication interface to an operating unit for monitoring and/or operating the field device (FG1, FG2), wherein communication access to the first gateway is implemented in the operating unit via a first driver in the operating unit, and wherein communication access to the second gateway is implemented in the operating unit via a second driver in the operating unit, characterized in that the first communication network and the second communication network are connected to a control station of the system, the control station establishes a communication connection either with the first communication network or with the second communication network and communicates, the control station switches to the other communication network (KN1, KN2) and establishes a communication connection with it if a problem with the previous communication connection is detected, and the operating unit constantly analyzes the first and the second communication network (KN1, KN2) and, if the control station switches, the switch is to the gateway (GW1, GW2) of the network that has an active communication connection with the control station.