Establishing time-sensitive communications between industrial end devices and an ethernet network
A method for establishing time-sensitive communication from at least one end device in an industrial plant into an Ethernet network with extended functionality for time-sensitive communication includes obtaining a first information model of the at least one end device, obtaining a second information model of the Ethernet network; determining first configuration information; determining second configuration information; transmitting the first configuration information to the at least one end device; and transmitting the second configuration information to the at least one network device.
1. A method for establishing time-sensitive communication from at least one end device in an industrial plant into an Ethernet network with extended functionality for time-sensitive communication, comprising the steps of:
obtaining a first information model of the at least one end device, and/or of at least a portion of the plant that comprises the at least one end device, wherein this information model is indicative of the type and/or content of messages that are to be sent to the Ethernet network by the at least one end device, and is also indicative of the destinations of said messages, and wherein the first information model, and/or a second information model, specifically is an Open Platform Communications Uniform Architecture, OPC UA, information model;
obtaining the second information model of the Ethernet network that is indicative of network devices, physical links within the Ethernet network, and the extended functionality for time-sensitive communication available in the Ethernet network;
determining, based at least in part on the first information model, first configuration information for the at least one end device, wherein said first configuration information enables the at least one end device to transmit, into the Ethernet network, a message and an indication of the functionality for time-sensitive communication to be used when transporting this message;
determining, based at least in part on the second information model, second configuration information for at least one network device in the Ethernet network, wherein said second configuration information enables the at least one network device in the Ethernet network to forward the message to its destination on the Ethernet network, using said indicated functionality for time-sensitive communication;
transmitting the first configuration information to the at least one end device; and
transmitting the second configuration information to the at least one network device.
2. The method of claim 1 , wherein the functionality for time-sensitive communication specifically is Time-Sensitive Networking, TSN, functionality.
3. The method of claim 1 , wherein the obtaining of the first information model specifically comprises: establishing, based at least in part on messages sent by end devices, and/or on responses of end devices to at least one query, an inventory of end devices within the industrial plant.
4. The method of claim 1 , wherein the obtaining of the second information model specifically comprises: establishing, based at least in part on responses by network devices to at least one query, an inventory of network devices and physical links in the Ethernet network.
5. The method of claim 1 , wherein the first configuration information comprises at least one rule for the end device to assign a particular priority or quality of service, QoS, class to a message, and/or to request the use of a particular functionality for time-sensitive communication, in response to the message meeting at least one predetermined condition.
6. The method of claim 5 , wherein at least one condition in at least one rule comprises:
the end device indicates, by virtue of the message, that it is in an abnormal state or that a physical action performed by the end device on an industrial process executed by the industrial plant has failed; and/or
a measurement value of a physical quantity that is comprised in the message falls above or below a predetermined threshold value set in the at least one rule.
7. The method of claim 1 , wherein the first configuration information includes instructions for the end device how to encode a request for a particular functionality for time-sensitive communication in at least one Ethernet frame transmitted to the Ethernet network.
8. The method of claim 1 , wherein the first configuration information comprises information that enables the end device to synchronize an internal system time with the Ethernet network, and/or a schedule for transmitting messages from the end device to the Ethernet network.
9. The method of claim 1 , wherein the second configuration information comprises instructions for a plurality of network devices to configure redundant forwarding paths for the message.
10. The method of claim 1 , further comprising: choosing at least one out of several network devices available in the Ethernet network based at least in part on quantitative utilizations of the several network devices.
11. The method of claim 1 , wherein at least one end device comprises:
a sensor that is configured to measure at least one physical property that is relevant for an industrial process executed by the industrial plant;
an actuator that is configured to perform a physical action on said industrial process; and/or
a controller that is configured to drive one or more actuators and receive measurement values from at least one sensor, so as to cause at least one quantity indicated by the measurement values to move to, and/or to remain at, a predetermined setpoint value.