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US 2004/0168053 A1Published application
Process automation system and process device for a process automation system
AssigneeSiemens Aktiengesellschaft
InventorsAndreas Kaszkin, Wolfgang Stiehl
Life of this patent
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Abstract
A process automation system in which process devices (1-6) execute predetermined functions as part of the process automation and exchange data (23, 24) relevant to functions and/or devices with the process automation system. Some but not all of the data (23, 24) are exchanged in encrypted form.
Claims12
A process automation system, comprising:
- process devices that execute predetermined functions as part of the process automation and thereby exchange data that are relevant to at least one of the functions and the devices within the process automation system,
- wherein some but less than all of the data are exchanged in encrypted form.
A process device for a process automation system, comprising:
- a function device executing predetermined functions as part of process automation;
- and
- a communication device connected to the function device and configured to connect into a process automation system for exchange of data, within the process automation system, that relate to at least one of a function and a device;
- wherein the communication device comprises means for performing the exchange of some but less than all of the data in encrypted form.
1 more element
A method for a process automation system having a plurality of process devices, comprising:
- generating transmission data in one of the process devices;
- encrypting at least some but less than all of the transmission data to produce encrypted transmission data and unencrypted transmission data;
- receiving the encrypted transmission data and the unencrypted transmission data in another of the process devices;
- decrypting the encrypted transmission data in the other process device.
1 more element
Dependencies are inferred from the claim text.