3
$\begingroup$

I want to know the different aircraft systems (LRUs) using ARINC429 protocol.
Why is it used instead of the ARINC 629 ?
How is it different from the different ARINC protocols like 629 and AFDX(664)?

$\endgroup$
2
  • $\begingroup$ Why do you need to know this? There isn't much difference between use cases for ARINC 429, 629, and AFDX besides age of the system, so I'm not sure how to provide a meaninful answer besides what user40476 has already provided. $\endgroup$
    – Cody P
    Jun 13, 2019 at 17:01
  • $\begingroup$ @srihari, I have updated my answer giving you the required list. $\endgroup$
    – user40476
    Jun 15, 2019 at 6:48

2 Answers 2

2
$\begingroup$

On modern aircraft all equipments that needs to communicate to each other in binary format may use ARINC 429 protocol. For instance all fly by wires computers on Airbus 320, 330, 340 use arinc 429 protocol.

Nowadays other protocols do exist too such as arinc 629 protocol or fiber optic protocols etc.

As a summary all aircraft systems that need to transmit and receive binary data may use 429 protocol, but other digital protocols are possible.

However a standardized LRU that doesn’t use ARINC 429 protocol is the FDR ( flight data recorder), because the data that it receives is already sequentially ordered, the label is not transmitted with the data value

On the following website starting page 43 you find all the possible equipment that may use A429

http://read.pudn.com/downloads111/ebook/462196/429P1-17_Errata1.pdf

Also in the same document starting page 13 you have the list of the parameters that may be transmitted on A429

Hope this added information is helpful

$\endgroup$
1
  • $\begingroup$ I got the answer from the above $\endgroup$
    – srihari
    Jun 17, 2019 at 5:37
1
$\begingroup$

Many LRUs have capabilities to send and receive on one or more of the protocols you have specified. Depending on the age and necessity/capabilities of the system, they might have interfaces for one or all. There are also CAN bus standards and others. Each protocol offers a similar approach to data transfer with unique capabilities for each, for example AFDX can implement redundancy and broadcast-like abilities through Virtual Links while A429, while older, is in wider use. If you could refine you question so it is not so broad, I'm sure I could give you a more detailed answer.

$\endgroup$
2
  • $\begingroup$ I hope you understand my question. What are the aircraft systems using the ARINC 429 Protocol $\endgroup$
    – srihari
    Jun 14, 2019 at 9:39
  • 1
    $\begingroup$ @srihari, if you require a full list of all systems, currently in use, in all aircraft...well, we would have a massive list, as most everything utilizes A429 in some manor whether it be data acquisition or data loading. I wish I could provide you with a comprehensive list but i'm more on the software side when dealing with the protocols and cannot provide a detailed list, i'm sorry. However if you do have specific functionality questions, i may be able to assist there. If you do really need the full list of LRUs implementing A429 it may be easier to compile a list of units that dont use it. $\endgroup$ Jun 14, 2019 at 11:42

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .