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COMMUNICATIONS PROTOCOLS IN AERONAUTICS

by George Novacek

Start ý Data Bus Systems ý Timing is the Secret ý ARINC 429 ý CSDB and ASCB ý MIL-STD-1553B ý ARINC 629 and Beyond ý ARINC 429 Implementation ý Data Format ý Wrap Up ý Sources and PDF

ARINC 429

This ARINC (Aeronautical Radio, Inc.) protocol is defined by specification 429, "Mark 33 DITS." With the exception of Boeing 777 and Airbus 330/340, Iým not aware of any currently flying transport aircraft not using it for interfacing aircraft avionic and flight control systems. It also can be found on the majority of modern business jets.

This serial communications protocol transmits data at a bit rate of either 12.5 kbps (slow) or 100 kbps (fast). The protocol is no speed demon, but itýs adequate for most applications even in the slow mode. Because of its prevalence in avionic applications, it deserves to be discussed in more detail later.

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