Bram, You shouldn't be having a problem if you and the other nodes have properly implemented Transport Protocol (I know, easy for me to say...). If you are...
7933
Bram Kerkhof
canbus@...
Oct 6, 2011 10:00 pm
On a slightly related note: what is the proper way of dealing with such duplicates in J1939 transport control frames for multi-frame PGNs? This week I...
7932
John Dammeyer
johnd@...
Oct 5, 2011 4:41 pm
That's the problem. Now remember, this is extremely rare if the bus isn't noisy and properly terminated without reflections. But imagine such a system where...
7931
Steffen Rose
ro@...
Oct 5, 2011 1:32 pm
Hello, ... [Comment] Do you mean the problem in the CAN design, that in the end of frame bit 7 the message is valid for receiver, but not for transmitter? ...
7930
Rufus V. Smith
rufuss@...
Sep 30, 2011 10:34 pm
Are you trying to control the main engine ECU by sending the SPN back to it? I understand the first diagram: Main Engine ECU -> Tx -> Service Tool (for...
7929
Allen Pothoof
apothoof@...
Sep 30, 2011 10:10 pm
I think I'm more confused than ever. It looks like you want to take the data from the ECU and then send it back to the ECU. First of all, the ECU may not even...
7928
Madhusudhan Chellappa
madhu.chellappa@...
Sep 30, 2011 5:06 pm
Thanks for your response. Sorry for the confusion - I think I'll reduce the question down to the most important bit ! No, I'm not trying to double the rate. ...
7927
Allen Pothoof
apothoof@...
Sep 30, 2011 4:45 pm
I'm with Rufus in that I don't really understand what you are trying to accomplish. Are you trying to do a bridge or router perhaps? If so, some of the...
7926
Rufus V. Smith
rufuss@...
Sep 30, 2011 2:10 pm
It's not completely clear what you are trying to accomplish. Are you trying to double the rate an SPN appears on the CAN-bus from the same ECU? From your...
7925
Madhusudhan Chellappa
madhu.chellappa@...
Sep 30, 2011 12:47 pm
Hello CAN experts, This may be a very easy question for most of the folks on this list! I am wondering if I am allowed to set up a system to send and receive...
7924
John Dammeyer
johnd@...
Sep 22, 2011 9:06 am
Hi Bertil, Thinking about the last bit in a message. If you have signal reflections that create a noise spike in the last bit position you could see double ...
7923
John Dammeyer
johnd@...
Sep 22, 2011 8:33 am
Finally. I found a reference to the problem. I searched using all sorts of different key words. Here's a description by Thilo Schumann that describes it in...
7922
Bertil Bäck
bertil.back@...
Sep 22, 2011 6:59 am
Hi, so the toggling might be the problem. There are only two nodes on the network. Ie all the Tx errors may be that one node boot faster than the other and...
7921
Smart David C
SmartDavidC@...
Sep 21, 2011 10:18 pm
Closely related to the toggle is perhaps a more general statement - avoid sending a delta - and for the same reason of a repeating duplicates. Messages that...
7920
John Dammeyer
johnd@...
Sep 21, 2011 8:19 pm
Hi Bertil, Somewhere there is an application note or a paper written discussion why toggle messages should not be used on the CAN bus. I'm trying to remember ...
7919
Corey, Richard
Richard.Corey@...
Sep 21, 2011 6:38 pm
... increasing the busload from normal 10% @ 125kbps to 70% @ 125kbps. ... I'm very surprised to see so many TX errors, especially at 125 KBPS. How long are...
7918
Bertil Bäck
bertil.back@...
Sep 21, 2011 2:19 pm
... Thanks for the input Rick. I forgot to mention that I was able to recreate the alarm behavior by increasing the busload from normal 10% @ 125kbps to 70% @...
7917
Corey, Richard
Richard.Corey@...
Sep 20, 2011 6:20 pm
... Maybe the timer that checks for "500 ms" is based on a counter-timer that doesn't handle rollover well. Perhaps, once it is mangled, it stays broken in...
7916
Bertil Bäck
bertil.back@...
Sep 20, 2011 11:02 am
Hi, I have a problem when using codesys v3 with SocketCAN on a ARM module using Linux kernel 3.0.2 with 2 SJA1000 CAN controllers. I have two of these modules....
7915
Heidrun Scheller
se@...
Sep 15, 2011 9:02 am
Dear Mr. Fiorotto ... The usage of object 607Eh (polarity) was corrected in the standard CiA-402, V3.0. The polarity bits shall allow to invert the "sensor...
7914
Marco Fiorotto
marco.fiorotto@...
Sep 12, 2011 7:34 am
Hi, In the description of Polarity I have identified the following inconsistencies / gaps between the description of the object in the specification 3.0 and...
7913
Jim DeVore
jim@...
Aug 29, 2011 11:31 am
TSC1's allow commanding torque, speed, torque limits and speed limits. They are in units of % of reference torque, a value broadcast in the engine ...
7912
DTP Paolo Castellano
paolo.castellano@...
Aug 29, 2011 9:58 am
Hi to all, I have to be able to limit the power of a Volvo Bus engine , for example: at full trottle the power output has to be the 50% of the pot. max. it is...
7911
John Dammeyer
johnd@...
Aug 24, 2011 10:36 pm
Great to hear you solved the problems. The Controller Area Network protocol at first looks very intimidating. I have a friend who wants to add a control...
7910
Ramphis Schoop
ramphiss@...
Aug 24, 2011 7:24 pm
Hello all,  especially John,  I have solved the problem and I am sending this email only for the record.  The problem was not in my code, but ...
7909
Dan Timothy
dantimothy@...
Aug 13, 2011 4:19 am
I need to use the signal from the OBD connector. is there a speed message that will give all speeds instead of above the 3kph markonly . we are using the j1939...
7908
Allen Pothoof
apothoof@...
Aug 12, 2011 4:37 pm
It would help if you told us which High Level Protocol you were talking about or, at least, which vehicle you were concerned with (although, unless it is a...
7907
Dan Timothy
dantimothy@...
Aug 12, 2011 3:42 am
I am new the CAN protocol messaging and Automotive messages I know that there is a speed tick that occures but only above about 3 kph is there another signal...
7906
Xiaofan Chen
xiaofanc@...
Aug 7, 2011 11:21 am
... Please ignore this. I accidentally click a "yes"... Sorry!!!!!!!!! -- Xiaofan -- Archives and useful links: http://groups.yahoo.com/group/CANbus Subscribe...
7905
Xiaofan Chen
xiaofanc@...
Aug 7, 2011 11:20 am
LinkedIn ... I'd like to add you to my professional network on LinkedIn. - Xiaofan Xiaofan Chen Staff Engineer at Rockwell Automation Singapore Confirm that...
