Method for controlling an industrial plant

1 . A method for controlling an industrial plant comprising a programmable logic controller, in which

the programmable logic controller establishes a connection with a cloud server,

the programmable logic controller executes a software module that causes the creation and/or configuration of a virtual machine on the cloud server,

the software module receives and stores an access token,

the programmable logic controller uses the access token to access the virtual machine,

the programmable logic controller cooperates with the virtual machine to transmit process data to the virtual machine and/or to support the control of the industrial plant,

wherein the cloud server has a cloud for the virtual machine and a management unit,

wherein the software module and/or the management unit creates/create the virtual machine on the cloud server, and

the virtual machine is configured during the creation, wherein the configuration parameters are provided by the programmable logic controller and/or by the management unit.

2 . The method in accordance with claim 1 ,

wherein the management unit communicates the access token to the programmable logic controller and/or the virtual machine.

3 . The method in accordance with claim 2 ,

wherein the communication of the access token by the management unit takes place at the request of the programmable logic controller.

4 . The method in accordance with claim 1 ,

wherein the access token is received and stored repeatedly.

5 . The method in accordance with claim 4 ,

wherein the access token is received and stored regularly.

6 . The method in accordance with claim 1 ,

wherein the management unit initiates the creation and configuration of the virtual machine and communicates with the cloud and the programmable logic controller for this purpose, wherein the management unit receives the request from the programmable logic controller to create the virtual machine for the programmable logic controller, wherein the programmable logic controller transmits at least a basic configuration and/or basic requirements for the virtual machine to be created to the management unit, wherein, based on the basic configuration and/or the basic requirements, the configuration parameters required for creating the virtual machine are generated in the management unit.

7 . The method in accordance with claim 6 ,

wherein the configuration parameters are automatically generated in the management unit.

8 . The method in accordance with claim 1 ,

wherein the communication between the programmable logic controller and the cloud server takes place in encrypted form.

9 . The method in accordance with claim 1 ,

wherein the programmable logic controller transmits plant data about the industrial plant to the cloud.

10 . A system comprising an industrial plant, a programmable logic controller, and a cloud server, wherein

the programmable logic controller is configured to establish a connection with the cloud server,

the programmable logic controller is configured to execute a software module that causes the creation and/or configuration of a virtual machine on the cloud server,

the software module is configured to receive and to store an access token,

the programmable logic controller is configured to use the access token to access the virtual machine,

the programmable logic controller is configured to cooperate with the virtual machine in order to transmit process data to the virtual machine and/or to support the control of the industrial plant,

wherein the cloud server has a cloud for the virtual machine and a management unit,

wherein the software module and/or the management unit creates/create the virtual machine on the cloud server, and

the virtual machine is configured during the creation, wherein the configuration parameters are provided by the programmable logic controller and/or by the management unit.