Contents
What is the data type of ARINC 429?
Bit-field discrete data, Binary Coded Decimal (BCD), and Binary Number Representation (BNR) are common ARINC 429 data formats. Data formats may also be mixed. Bits 9 and 10 are Source/Destination Identifiers (SDI) and may indicate the intended receiver or, more frequently, indicate the transmitting subsystem.
What does ACARS stand for?
Aircraft Communication Addressing and Reporting System
ACARS is an acronym for Aircraft Communication Addressing and Reporting System. It is a data protocol defined in ARINC Specification 618, published and administered by Aeronautical Radio, Inc.
What is an ACARS message?
ACARS (pronounced AY-CARS) is a digital data link system for the transmission of messages between aircraft and ground stations, which has been in use since 1978.
Why are we moving away from arinc-429 bus?
The primary reason for moving away from ARINC-429 is that it is a single transmitter/multiple receiver architecture. This results in a large amount of physical wire. That adds weight and requires maintenance. A bus such as ARINC-664, which is based on Ethernet, can significantly reduce wire.
Which is ARINC bus does the B787 use?
B787 uses ARINC 664 for the main buses with a large mix of ARINC-429 and ARINC-825 (CAN bus) as well. There are a number of data concentrators/converters on the aircraft to get data where it needs to go. The primary reason for moving away from ARINC-429 is that it is a single transmitter/multiple receiver architecture.
How are arinc-429 and MIL-STD-1553 different?
There is actually quite a lot of difference between ARINC-429 and MIL-STD-1553. They are different because they were developed by two different groups with different needs. Both started in the 1970’s. Before then there was almost no digital data of any kind on a an aircraft. It was almost all analog or discrete.
Why was the arinc-629 introduced to aviation?
Civilian aircraft certification doesn’t like a lot of risk and the simpler bus architecture made it easier to design, analyze, and certify. Since then there have been a number of new buses introduced into aviation. Some have lasted longer than others. B777 introduced ARINC-629 and Fibrechannel.