Does the CAN standard say anything about how often a SYNC-message cant be sent to the bus? I could not find any exact number for the shortest time, like once...
s.p.
karhukissa@...
Oct 5, 2007 2:43 pm
6253
Hello s.p. ... SYNC messages are a definition of the CANopen standard, not CAN. ... No, the standard doesn't give a minimum value. It depends on the overall...
Heinz-Juergen Oertel
oe@...
Oct 5, 2007 4:06 pm
6254
Hello, ... As far as I know there is no definition of "shortest SYNC delay". But you have to keep in mind the following thing: Lets assume a standard CAN...
Torsten Krahl
krahl@...
Oct 5, 2007 4:08 pm
6255
Hello, I had a basic question regarding the CAN protocols. Why there are so many CAN protocols: Bosch Spec, ISO 11898, J-1939..and so on..!! Are they just...
Rotti, Prasad (IE10)
Prasad.Rotti@...
Oct 8, 2007 9:39 pm
6256
Hi all, A J1939 specific question here; does anyone know if there is a message to request the Engine Torque Mode (EEC1)? My problem is that I need the engine...
Jason Turner
jnturner@...
Oct 9, 2007 1:29 am
6257
Hello Prasad, Bosch, our fearless leader, pretty much specifies the CAN controller behavior. ISO-11898-1, ISO11898-2 specify the 11-bit and 29-bit identifiers...
Corrigan, Steve
s-corrigan1@...
Oct 9, 2007 4:07 am
6258
Hello Prasad, There is hierarchy between the standars. Bosch CAN-spec has been moved to ISO-11898-1 and -2. -1 defines the OSI level 1 and 2 frame trasnfers,...
heikki.saha@...
Oct 9, 2007 6:31 am
6259
... Hi! And a million thanks for help! I tried to find the length of the SYNC frame, but all I could find was that "the Sync telegram does not carry any data"....
s.p.
karhukissa@...
Oct 9, 2007 8:21 am
6260
Hello All, maybe this is a little "off-topic" but I know you´re all working with CAN and you all have to use some cable ;-) I´m on the search for CAN cable (...
Torsten Krahl
krahl@...
Oct 9, 2007 10:36 am
6261
Hello, ... that´s quite good ... but you have lost the "stuff bits". A stuff-bit is used every time you have 5 consecuitive bits with same polarity in the ...
Torsten Krahl
krahl@...
Oct 9, 2007 10:36 am
6262
Hi all, We are using CB 626 from SAB. There are 4-wise twisted 0.5mm2 wires, impedance-matched CAN-wires and CAN_GND and CAN_VS. And screen of course. We have...
heikki.saha@...
Oct 9, 2007 12:00 pm
6263
It' a pity. No answer on my question, although there many active CANopen experts use this forum. One question is very important for me: A Digital Output value...
rumpie_rnk
Ralf.Neuber@...
Oct 12, 2007 1:42 pm
6264
afaik it makes no difference. Both is allowed. Best regards, René Heijma E-mail: rene.heijma@... "rumpie_rnk" <Ralf.Neuber@web. de>...
rene.heijma@...
Oct 12, 2007 2:13 pm
6265
Hi there - My understanding is that CAN should be run on 120 ohm twisted pair wires. How much of a problem is it for CAN to be run on other types of wires? (ie...
Michael Noone
mnoone@...
Oct 12, 2007 2:25 pm
6266
... you can do both ... Set the output by SDO or PDO. The only difference is, that the PDO-technique will work in "Operational State" of the module. The...
Torsten Krahl
krahl@...
Oct 12, 2007 2:27 pm
6267
Hi Ralf,
My answers to your questions would be:
1.) when the entry in the object dictionary is marked as RW, and there is no error in the format, then it...
Galuski Michael
M.Galuski@...
Oct 12, 2007 2:34 pm
6268
Hello Ralf, ... Sometimes the experts are out of the office :-) ... No surprise: some manufacturers event don't run CANopen at all, although the marketing...
koppe
koppe@...
Oct 12, 2007 3:39 pm
6269
Hello all, with regard to the origin topic it is clearly stated in the specification CiA 401: "...Output data can be received via RPDO by those I/O modules...
Reiner Zitzmann
canlist@...
Oct 12, 2007 4:07 pm
6270
Hi Michael, I've stripped out a single twisted pair from the covering many times. I've even tried telephone wire and it worked. The differential bus voltage...
Corrigan, Steve
s-corrigan1@...
Oct 12, 2007 4:31 pm
6271
CAN is very forgiving and the impedence of the cable is not very important. Just think about what is happening during arbitration! Best regards, Lars-Berno...
Lars-Berno Fredriksson
LBF@...
Oct 12, 2007 5:17 pm
6272
You may also want to consider the environment you're in and how much noise can affect your network. Robert ... From:...
Robert Cronkite
rcronkite@...
Oct 12, 2007 6:27 pm
6273
Hi, I agree with Steve. I've also done tests for a client with the 4 conductor solid telco wire (red,black,grn,yel), 30m at 1mbps. But that was in a noise...
John Dammeyer
johnd@...
Oct 12, 2007 6:40 pm
6274
Hi there - can anybody tell me what function the terminating resistors on a CAN bus serve? I have heard various conflicting explanations for them. My...
Michael Noone
mnoone@...
Oct 16, 2007 9:35 pm
6275
Hello Michael, Can is a differential bus and the equal but opposite return current through CANL (through the termination resistor from CANH)establishes the ...
Corrigan, Steve
s-corrigan1@...
Oct 16, 2007 11:23 pm
6276
Hi Mike, Steve Corrigan from TI can certainly tell you more but in a nutshell the resistors do two things. They are placed at each end of a transmission line...
John Dammeyer
johnd@...
Oct 17, 2007 12:42 am
6277
I have a 'stub' termination build in each node of 2400 Ohms. With that CAN even works with no termination resistor in the bus wire. Email von Peter Lauer...
Peter Lauer
plauer@...
Oct 17, 2007 1:07 pm
6278
Hi Everyone, Here's a link to an article discussing using CAN within Linux with a protocol called PF_CAN. Interesting. John Dammeyer Automation Artisans Inc. ...
John Dammeyer
johnd@...
Oct 19, 2007 4:53 pm
6279
oops. <http://www.pcworld.idg.com.au/index.php/id;11338500> http://www.pcworld.idg.com.au/index.php/id;11338500 Automation Artisans Inc. ...
John Dammeyer
johnd@...
Oct 19, 2007 6:39 pm
6280
Hello John, unfortunately the article from Jonathan Corbet doesn't say anything about the details behind the curtain: - The guys from VW have a patent on the...
Uwe Koppe
koppe@...
Oct 22, 2007 8:39 am
6281
Hello all, thanks for all the answers. Some obscurities are now clear, but not all. In adaption of my question 3: Like f.e. Michael Galuski wrote could be...
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