RE: J1939/11 SHIELD GROUND

Hello John,

 

Unless other folks have input on the CAN shield, we can consider this matter closed.  I do not appreciate people jamming blogs with nonsense or hi-jacking other thread titles.

 

I thank you for your information on J1939 however!

Cheers

 

From: [email protected] [mailto:[email protected]] On Behalf Of John Dammeyer
Sent: Wednesday, June 10, 2015 3:45 AM
To: [email protected]
Subject: RE: [CANLIST] J1939/11 SHIELD GROUND

 

Seriously?  The exact same text cut and paste from a different message with a different subject line?

I will no longer respond to this.

John Dammeyer 

 

From: [email protected] <mailto:[email protected]>  [mailto:[email protected]] On Behalf Of Aayushi Sahu
Sent: June-10-15 12:15 AM
To: [email protected] <mailto:[email protected]> 
Cc: [email protected] <mailto:[email protected]> 
Subject: Re: [CANLIST] J1939/11 SHIELD GROUND

 

Sir,

 

CAN is really difficult to understand when I'm just in the basic level. All I can find is the basic structure and typical diagrams so I'm not able to know from where to start. 

 

Could you please take out some time to explain a student who is totally new to the CAN bus from the beginning? I just know what is CAN and what it is used for and its structure. I'm unable to grab anything else. Could you just brief out what do i do to start and everything else i need to know in simple words.? Please sir, it is really important to me, since last 10days I've been trying and now its really high time I know everything about CAN especially using arduino because my head told me to use arduino. 

 

We have designed a prototype of a driverless car. Now we'll be working on Mahindra E2O car and We need to implement all the sensors and everything using CAN protocol. So I need to know everything about CAN from the start till the end.

 

Kindly help me Sir. I would really appreciate your help and you'll be helping our team as a whole. Awaiting your response

 

Thank you.

 

Regards,

Aayushi Sahu

aayushisahu95@gmail,com

+919916861884 

 

On Tue, Jun 9, 2015 at 10:18 PM, John Dammeyer <[email protected] <mailto:[email protected]> > wrote:

I ran into a similar problem.  I needed both Engine RPM and Transmission
Selection from a J1939 bus.  The costs of the standard also appeared
prohibitively high.  However I was starting with a large wall chart on J1939
from Vector and a book by Wilfried Voss titled “A Comprehensible Guide to
J1939”
Also there are a number of free J1939 monitoring programs out there that do
list a lot of the message IDs and data content.  With all that and a bit of
reverse engineering we did find the RPM and transmission selector.
However, ultimately we bit the bullet and bought the relevant standards.
Given that perhaps people's lives are at risk if equipment malfunctions the
standards costs are pretty low.
John  Dammeyer

From: [email protected] <mailto:[email protected]> 
[mailto:[email protected] <mailto:[email protected]> ] On Behalf Of Bram
Kerkhof
Sent: June-09-15 7:31 AM
To: [email protected] <mailto:[email protected]> 
Subject: RE: [CANLIST] J1939/11 SHIELD GROUND

Investing a couple of Benjamins to ensure your products are playing nice
with other doodahs that are controlling multiple metric tons of
bone-crushing and flesh-grinding machinery is *always* a good idea.
IIRC, SAE has a web subscription package for all J1939-related standards
that is not completely over-the-top expensive (but not cheap either).

As far as I’m aware, all downloads from the SAE (and ISO as well) are
watermarked with the details of the buyer. You might be able to access the
documents in a university/polytechnical school library (if you have access
to one of those).

cheers,
Bram

From: [email protected] <mailto:[email protected]> 
[mailto:[email protected] <mailto:[email protected]> ] On Behalf Of Cain
Shultz
Sent: dinsdag 9 juni 2015 15:33
To: [email protected] <mailto:[email protected]> ; [email protected] <mailto:[email protected]> 
Subject: FW: [CANLIST] J1939/11 SHIELD GROUND

Good Day Bram,

Thank you for that information.  You seemed to sum it up pretty easily.
Unfortunately I do not have a copy of J1939/11 to reference.  My resources
are limited and I do not have the funding to purchase such document from
SAE.. my company does not really see the point in ‘investing’ in such
documents at the moment.  I chose J1939/11 as our business is in the
off-highway fluid power sector.  So a majority of our customers use J1939.
I am looking to follow best practices from the very beginning, rather than
making things work.. then realizing it didn’t follow requirements and it be
a mess down the line or doesn’t communicate with other CAN networks on a
machine.
We (and that, I mean, ‘I’) are hoping to expand from a hydraulic supplier
into a systems integrator using electronics/hydraulics.  Is there any other
source for J1939/11?..
[email protected] <mailto:[email protected]> 

Thank you for your time,
-Cain





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