This would be simple and ideal ... was just worried (in my complete ignorance) about the effect of doing this on bus capacitances etc. So there is no problem...
Liz Murphy
liz@...
May 1, 2008 9:44 am
6582
I don't remember any documentation on that. I would also recommend cut both CAN-H and CAN-L connections, because I found the CAN network can work with only one...
Funny NYPD
funnynypd@...
May 1, 2008 11:32 am
6583
Hi Liz, I use ADG821 relays from ADI to open the bus lines in a CAN demo circuit. The schematic is online -- SYSMON schematics pg 6, (system monitor) at the...
Corrigan, Steve
s-corrigan1@...
May 1, 2008 3:35 pm
6584
Hi all, I just needed to think about CiA definitions for max. single and cumulative dropline length definitions. In some CiA documents 300mm and 1500mm are...
heikki.saha@...
May 4, 2008 3:32 pm
6585
Hello Heikki, This mostly depends upon the margin of safety you design into your bus. Since stub-lines are unterminated, signal reflections can develop in a...
Corrigan, Steve
s-corrigan1@...
May 4, 2008 7:09 pm
6586
Hi all, Please don't be very harsh with me cause I'm kind of newbie here. :) I have an eds file which gives me some errors and warnings when checking with...
Liana Barlea
liannebbb@...
May 6, 2008 4:11 pm
6587
Hi all, Please don't be very harsh with me cause I'm kind of newbie here. :) I have an eds file which gives me some errors and warnings when checking with...
Liana Barlea
liannebbb@...
May 6, 2008 4:15 pm
6588
Hello Liana, CANchkEDS has been developped by our CANopen team. I will forward your question to the colleagues and they will answer directly. Regards Juergen ...
Klüser, Jürgen
Juergen.Klueser@...
May 6, 2008 5:28 pm
6589
Dear Liana, the consistency check of eds indicates that you are using DataType = 0x001 for 1400sub0, 1400sub2 and 1600sub0. DataType 0x001 is Boolean, that is,...
Osmar Yang
oy@...
May 6, 2008 9:33 pm
6590
Hi Liana, I checked my eds examples."PDO mapping parameter objects" are objects like 1400 and 1600. THEY have must have access type rw instead of ro, not the...
Osmar Yang
oy@...
May 6, 2008 9:37 pm
6591
Votre invitation aux Ventes Priv Fashionshopping.com. Si cette page ne s'affiche pas correctement, suivez ce lien Vous avez invitmais conformement ...
FashionShopping.com
invitation@...
May 6, 2008 11:00 pm
6592
Hello Osmar, Thank you very much for your fast answer. You are right I was using a wrong type and I didn't even noticed. Actually my intention was to use 8-bit...
Liana Barlea
liannebbb@...
May 7, 2008 8:45 am
6593
Hi, Can any one of u clarify the doubt of CAN remote frames. when can receiver receives the remote frame. Receiver should check and identifier matching test...
N.Swathi
n.swathi@...
May 13, 2008 9:39 am
6594
Hi, Handling of RTR-messages depend on the CAN-controller you are using. Shortly: - If you have so called "full-CAN"-controller, if it receives a message with...
heikki.saha@...
May 13, 2008 11:08 am
6595
Hey everyone. I'm new to this board, and to CAN for that matter and I've got a question. I've got a CAN bus that we are attempting to setup. It has 61 nodes...
mddolloff
matthew.d.dolloff@...
May 13, 2008 1:47 pm
6596
Matt, What is the spec of your CAN transceivers on each node? The input impedance may be causing this. Regards Charles E. Pinkstone Senior Development Engineer...
Charles Pinkstone
CPinkstone@...
May 13, 2008 2:34 pm
6597
Matt, What is the spec of your CAN transceivers on each node? The input impedance may be causing this. Regards Charles E. Pinkstone Senior Development Engineer...
Charles Pinkstone
CPinkstone@...
May 13, 2008 2:42 pm
6598
61 nodes may be too many. You can remove some nodes and try it again. Lu Gao 2008-05-13 ... ·¢¼þÈË£ºCharles Pinkstone ·¢ËÍÈÕÆÚ£º2008-05-13...
lgao@...
May 13, 2008 2:52 pm
6599
I'm using a an MCP2551 which looks like it has an input impedence of 5k-50k according to the data sheet. ...
mddolloff
matthew.d.dolloff@...
May 13, 2008 3:36 pm
6600
I have done that and it works. I need to run all 61 nodes though. Running fewer is not an option. ... -- View this message in context:...
mddolloff
matthew.d.dolloff@...
May 13, 2008 3:36 pm
6601
Per SAE spec., the J1939-11 max support 30 nodes. The J1939-15 max support 10 nodes. Recommend check with your transceiver spec too. BTW, what transceiver are...
Funny NYPD
funnynypd@...
May 13, 2008 3:39 pm
6602
Hi Matt, Thanks for posting the detailed hardware info. You've stated that each node is sending a message once per second. Is the ID of each message unique?...
John Dammeyer
johnd@...
May 13, 2008 4:29 pm
6603
Have you tried increase both terminal resistors to higher value? e.g. Two 240 Ohm resistors. It might not meet the spec. But your network got so many nodes...
Funny NYPD
funnynypd@...
May 13, 2008 4:49 pm
6604
Thanks for all the suggestions John. Yes, all the message id's are unique. It's only an 11 bit ID with 4 bytes of data. My sample point is at about 73% but I...
mddolloff
matthew.d.dolloff@...
May 13, 2008 5:27 pm
6605
I have not tried that yet. I had thought about doing that but wasn't sure if it was worth my time. I'm thinking I'll actually just hook a decade box up to...
mddolloff
matthew.d.dolloff@...
May 13, 2008 5:30 pm
6606
Matt, Can you put a scope on the bus? You may be loading the bus with too much capacitance. When that happens the tpHL (dominant to recessive transition time)...
Corrigan, Steve
s-corrigan1@...
May 13, 2008 5:44 pm
6607
OK. At that bit rate I'd suggest closer to 87% sample point. I know it's probably a pain in the rear to do it but dropping down to 100kbps for a trial run...
John Dammeyer
johnd@...
May 13, 2008 5:50 pm
6608
Steve, That is actually on my list of things to do as soon as I can get back in the lab and on the rig. What sort of time am I looking at for tpHL? Right now...
mddolloff
matthew.d.dolloff@...
May 13, 2008 6:42 pm
6609
Since your network does not seem to be overloaded, my suggestion would be to try lower transmission speeds (250k) to see what happens. Osmar ... De:...
Osmar Yang
oy@...
May 13, 2008 6:53 pm
6610
Matt, The transceiver you are using has I believe, a 125 ns dominant-to-recessive transition time. As capacitance builds up, it really stretches out this...
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