Hello together, we have a network with different kinds of CANopen-nodes. One of these nodes is superior. This node is a control which function as master. So...
5909
Klüser, Jürgen
Juergen.Klueser@...
Dec 4, 2006 5:24 pm
Hello Daniel, this is right, normally a second SDO client should use another SDO. It is not documented in the CANopen specifications, since this is already a...
5910
Wrye, Walter C
wcwrye@...
Dec 4, 2006 5:27 pm
Hello all, I am working on an undergrad thesis project investigating the options for enhancing / replacing a controller area network that was designed over 10...
5911
Daniel Geiger
d.geiger@...
Dec 4, 2006 5:35 pm
Hello Jürgen, I know that every ID have to be unique in a network. But I think there is no regulation in the standard which says, that you should use a second...
5912
Klüser, Jürgen
Juergen.Klueser@...
Dec 5, 2006 11:06 am
Hello Daniel, you are right. The CANopen standards do specify protocols, services etc., but it does not intend to specify how to be used. Like with CAN: It...
5913
Heinz-Juergen Oertel
oe@...
Dec 5, 2006 8:42 pm
... Jürgen gave already answers here, and he was, like always, correct. ... Let me try your second part of the question. If your nodes, including the network...
5914
Moshe Barazani
mbarazani@...
Dec 6, 2006 9:22 pm
Dear friends, Error frames are 'address less' and this is clear. Is anyone familiar with a method or product that can monitor the bus and point out the source...
5915
John Dammeyer
johnd@...
Dec 7, 2006 4:51 am
Hi, If you wire up '1' light bulb to 50 switches in parallel in 50 different rooms. You then announce over the intercom system that each person should turn on...
5916
Moshe Barazani
mbarazani@...
Dec 7, 2006 9:22 am
Hi John, As always your replies are very clear, colorful and 'idiot proof' and I thanks you for that. Can you please address me to an article or any other...
5917
John Dammeyer
johnd@...
Dec 7, 2006 9:49 am
Hi Moshe, I suspect you are trying to determine if a node is damaged and continually failing? Or has brought the bus down and no one can transmit? There are a...
5918
Lars-Berno Fredriksson
LBF@...
Dec 7, 2006 1:06 pm
Hi Moshe, To find the event causing an Error Frame is a difficult task if the system was not designed for systems supervising and trouble shooting in the first...
5919
tyler7osfp
iliasgiannoutsos@...
Dec 8, 2006 8:57 pm
Hello. I have take an essay in my schooll with main subject Canbus. I want to write an example of how CANBUS or Canopen is being used in a car. I am searching...
5920
PatPower
james@...
Dec 14, 2006 6:42 pm
Hi there, I'm relatively new to CAN/J1939, and new to the forum, so please bare with me. I am working on an engine with an on-board ECU that will transmit ...
5921
Wrye, Walter C
wcwrye@...
Dec 14, 2006 7:05 pm
Hello all, I am working on an thesis project investigating the options for enhancing / replacing a controller area network that was designed over 10 years ago....
5922
John Dammeyer
johnd@...
Dec 14, 2006 7:37 pm
Hi Walter, Your first question is difficult to answer since the requirements of the embedded system should drive the architecture of the communications system ...
5923
Jim DeVore
jim@...
Dec 14, 2006 10:46 pm
Mike- Welcome to CAN/J1939. I'm not familiar with that tool, but J1939-71 spells out how to encode this value. It says SPN 190 is 0.125 rpm/bit with no...
5924
Joe Sullivan
jets1961@...
Dec 14, 2006 11:35 pm
Mike, It's been I while since I worked with J-1939 but the engine ECU should be sending the actual value of the Engine speed. Also with engine temp the offset...
5925
Joe Legris
jalegris@...
Dec 15, 2006 12:02 am
The term "actual speed" is ambiguous. The speed is encoded at .125 RPM per bit, so you must DIVIDE the speed expressed as RPM by .125 before transmitting so...
5926
Allen Pothoof
apothoof@...
Dec 18, 2006 12:05 am
Your question on engine speed has been throughly discussed at this point so I won't address that. But you also ask why there is a 40 degree C offset on ...
5927
Jim DeVore
jim@...
Dec 18, 2006 1:10 am
I had not considered the calculation. This was before my time, so this is also speculation, but that offset also controls the minimum temperature that you can...
5928
Geoff Field
geoff_field2003@...
Dec 18, 2006 2:22 pm
Unless you have a really special engine, if it's at -40 it's simply too cold. Is there a point to resolving temperatures below that for automotive use? Geoff ...
5929
John Dammeyer
johnd@...
Dec 18, 2006 7:45 pm
Hi You folks just haven't lived in Northern Canada. Back when I went to school (here it comes <WINK>) they only closed the schools when the temperature ...
5930
Pradeep Chandramohan ...
Pradeep.C@...
Dec 19, 2006 7:56 am
Values the are exchanged on the CAN bus are always in terms of absolute numbers and have no physical units. The OEM will fix the range, resolution required for...
5931
PatPower
james@...
Dec 19, 2006 3:34 pm
Hi Everyone, Thank you all for your input. I just returned from travel and was happy to see all the response, but sorry I couldn't have been more involved. ...
5932
Offshore Systems (UK)...
bruce@...
Dec 19, 2006 5:39 pm
Where can we purchase and what is the cost of the J1939 standard please? Best regards Bruce Coward Offshore Systems (UK) Ltd T: +44(0)1425 610022 F:...
5933
Heinz-Juergen Oertel
oe@...
Dec 19, 2006 7:06 pm
... CAN Wiki at http://www.can-wiki.info/SaeJ1939 says: http://www.sae.org/products/j1939.htm ... I hope I was authorised, or should I delete my Email, or my...
5934
Oliver Betz
list_ob@...
Dec 20, 2006 1:56 pm
Hello All, looking for a cheap, slow, robust unshielded single wire connection in 24V industrial environment, I consider using LIN transceivers. Are there any...
5935
janssen.tomas
janssen.tomas@...
Dec 20, 2006 2:48 pm
Hello all, There is only two nodes in my CAN network environment, one is the chip which contains a CAN controller similiar as SJA1000, another one is the...
5936
Heinz-Juergen Oertel
oe@...
Dec 20, 2006 4:21 pm
... It should work, if you are measuring somewhere at the end of the frame at the acknowlege field. you can see at the tx pin when the bit is sent and compare...
5937
heikki.saha@...
Dec 21, 2006 8:11 am
Hello Oliver, ... What is the MAC-protocol you want/have to use? ... Everything. Don't do that - LIN-networks have so slow slopes that it does not work. If you...
