Standard data transmission protocols in process control applications
G. Funk · European Transactions on Electrical Power · 1992
Abstract The paper describes a standard data transmission protocol that is widely used in telecontrol systems and in field‐bus systems for process control applications. The described standard is based on an asynchronous data transmission method that is used for character transmission in office automation systems. The described code guarantees Hamming distance 4 as protection against undetectable message errors. Furthermore, the article describes extensions of the standard code that achieve Hamming distances 6 and 8. The increased data integrity levels of the described data transmission protocols are achieved by defining product codes with single parity check codes and BCH codes and by defining special sync characters.