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...
Daniel Geiger
d.geiger@...
Dec 4, 2006 3:52 pm
5909
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...
Klüser, Jürgen
Juergen.Klueser@...
Dec 4, 2006 5:24 pm
5910
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...
Wrye, Walter C
wcwrye@...
Dec 4, 2006 5:27 pm
5911
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...
Daniel Geiger
d.geiger@...
Dec 4, 2006 5:35 pm
5912
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...
Klüser, Jürgen
Juergen.Klueser@...
Dec 5, 2006 11:06 am
5913
... 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...
Heinz-Juergen Oertel
oe@...
Dec 5, 2006 8:42 pm
5914
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...
Moshe Barazani
mbarazani@...
Dec 6, 2006 9:22 pm
5915
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...
John Dammeyer
johnd@...
Dec 7, 2006 4:51 am
5916
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...
Moshe Barazani
mbarazani@...
Dec 7, 2006 9:22 am
5917
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...
John Dammeyer
johnd@...
Dec 7, 2006 9:49 am
5918
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...
Lars-Berno Fredriksson
LBF@...
Dec 7, 2006 1:06 pm
5919
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...
tyler7osfp
iliasgiannoutsos@...
Dec 8, 2006 8:57 pm
5920
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 ...
PatPower
james@...
Dec 14, 2006 6:42 pm
5921
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....
Wrye, Walter C
wcwrye@...
Dec 14, 2006 7:05 pm
5922
Hi Walter, Your first question is difficult to answer since the requirements of the embedded system should drive the architecture of the communications system ...
John Dammeyer
johnd@...
Dec 14, 2006 7:37 pm
5923
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...
Jim DeVore
jim@...
Dec 14, 2006 10:46 pm
5924
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...
Joe Sullivan
jets1961@...
Dec 14, 2006 11:35 pm
5925
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...
Joe Legris
jalegris@...
Dec 15, 2006 12:02 am
5926
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 ...
Allen Pothoof
apothoof@...
Dec 18, 2006 12:05 am
5927
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...
Jim DeVore
jim@...
Dec 18, 2006 1:10 am
5928
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 ...
Geoff Field
geoff_field2003@...
Dec 18, 2006 2:22 pm
5929
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 ...
John Dammeyer
johnd@...
Dec 18, 2006 7:45 pm
5930
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...
Pradeep Chandramohan ...
Pradeep.C@...
Dec 19, 2006 7:56 am
5931
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. ...
PatPower
james@...
Dec 19, 2006 3:34 pm
5932
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:...
Offshore Systems (UK)...
bruce@...
Dec 19, 2006 5:39 pm
5933
... 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...
Heinz-Juergen Oertel
oe@...
Dec 19, 2006 7:06 pm
5934
Hello All, looking for a cheap, slow, robust unshielded single wire connection in 24V industrial environment, I consider using LIN transceivers. Are there any...
Oliver Betz
list_ob@...
Dec 20, 2006 1:56 pm
5935
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...
janssen.tomas
janssen.tomas@...
Dec 20, 2006 2:48 pm
5936
... 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...
Heinz-Juergen Oertel
oe@...
Dec 20, 2006 4:21 pm
5937
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...
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