FIELD BUS DATA TRANSMISSION

摘要

A communication subscriber for a field-bus system for transmitting data, comprises a safety layer with an error-safety layer protecting the data against random data transmission errors and an information-security layer protecting against manipulation of data and/or against unauthorized reading of data. The communication subscriber is configured during transmission mode to process the data to be transmitted first by means of the error-safety layer and then by means of the information-security layer, and during receipt mode to process the data first by means of the information-security layer and then by means of the error-safety layer.