Operation of data transmission system for program memory control etc. - transmitting data as sequence with blocks for different subscribers and with input response telegram over common bus

摘要

The control method is provided for a data transmission system having a number of subscribers coupled to a common bus line. Information is transmitted in the form of a central output poll (COP) that has a synchronisation byte (sync) and a frame control (FCI) byte to identify different telegram types having data blocks (OD1-ODn). A test byte in the form of a frame check sequence (FCS) controls the transmission. An input response transmission has a synchronisation byte followed by a frame control byte, identification data and a block check character. ADVANTAGE - Improved data transmission without reducing transmission rate.