Hello, I'm looking for an ARM7 CAN controller (should have at least 2 CAN channels). It should have already some FLASH and RAM integrated, but it also must...
eibach@...
Jul 1, 2003 7:23 am
2620
Hello. I need to make a decision on which connector I must use for a bus with Canopen on high layer, inside panels for power plants. Did someone know some...
Gilvan Tessari
gt@...
Jul 2, 2003 1:20 pm
2621
... Which connector you chose should only depend of your environmental conditions. (don't forget increased costs ;-) -- with best regards / mit freundlichen...
DS-301 states that there is a possibility to use CANopen data types (1H-7H) in the mapping parameter array for allow the device receiving the PDO not to...
lokotkov2001
alex@...
Jul 3, 2003 11:19 am
2624
Hi Alex, ... Currently not. As written in the spec only 0001h to 0007h can be mapped for this purpose. The question would be to allow also 0010h, 0012h to...
Thilo Schumann
headquarters@...
Jul 3, 2003 11:32 am
2625
Hello, how do I put 12V and GND if I distribute them together with Canbus (in twisted pair or not). What if I use 2 twisted pairs (12V on one twisted pair, GND...
Robert Rozman
rozman@...
Jul 4, 2003 2:06 pm
2626
HiRobert, The reason for the twisted pair is to cancel out noise generated by external fields crossing through the wires. (I think that's how it's explained)....
John Dammeyer
johnd@...
Jul 4, 2003 5:11 pm
2627
... I'd recommend twisting the 12V and GND together, and the two CAN lines. Twisted pairs tend to reject common mode noise. Bruce ... -- Archives and useful...
Bruce Boyes
bboyes@...
Jul 4, 2003 6:20 pm
2628
... Thanks John, you jogged my memory. Twisted pairs are so good because of 1) small 'loop area' doesn't make a good receiving antenna as parallel wires do 2)...
Bruce Boyes
bboyes@...
Jul 7, 2003 6:22 am
2629
I am looking at performing closed loop control via CANbus. In the loop there will be an array of load cells with digital outputs, a control valve with built in...
Tim J Brown
tjb@...
Jul 7, 2003 10:04 am
2630
Hi, I have just built a prototype with such a configuration and I'm evaluating its performance. Assuming you use standard ids (11 bit) plus 24 bits of data,...
Osmar Yang
oy@...
Jul 7, 2003 1:55 pm
2631
Hi Tim, There are several ways to calculate worst-cases depending on the resolution required. If you need it down to single microseconds, it can get a little...
Tutors of ESAcademy
esacademy@...
Jul 7, 2003 1:56 pm
2632
Hello Tim! My comments below. Tim J Brown wrote: ... How long are your overall cable lengths? Which CAN-transceiver do you intend to use? For 1 MBaud you take...
Anastasios Tsitlakidis
proirl@...
Jul 7, 2003 4:43 pm
2633
Hello, I'm currently having problems with Can Extender nodes in my Canbus network. They seem not to accept probably proper acknowledge from other nodes (with ...
Robert Rozman
rozman@...
Jul 7, 2003 9:17 pm
2634
Hi guys ! I guess that actually, CAN implementations can be split into two distinct categories: ** "basic CAN" based on FIFO structure ** "full CAN" based on...
For CanOpen and DeviceNet applications I'd use a basic CAN controller, since the software stack has to handle all the functions, you don't get any plus from...
Bende Georg
georg.bende@...
Jul 8, 2003 3:42 pm
2636
... http://www.google.de/search?q=BASIC+FULL+CAN with best regards / mit freundlichen Grüßen Heinz-Jürgen Oertel ...
Heinz-Juergen Oertel
oe@...
Jul 8, 2003 5:07 pm
2637
... I'd like to vetoing, at least for CANopen. For small applications, typical slaves, eg. sensors or i/o modules, you can arrange the Full CAN hardware...
Heinz-Juergen Oertel
oe@...
Jul 8, 2003 5:45 pm
2638
First of all, I'm not sure I accept your distinction of "basic CAN" vs "full CAN" but it's probably irrelevant. I've used both hardware filtering of message...
Allen Pothoof
apothoof@...
Jul 8, 2003 6:13 pm
2639
Hi Frederic, ... distinct ... filter ... need one of ... them ??? I guess this is a perfect example for a question where you can ask 3 experts and get at least...
Tutors of ESAcademy
esacademy@...
Jul 8, 2003 11:55 pm
2640
Hi Frederic, I checked the DeviceNet specification for you. If you develop a what is called UCMM incapable device, that is a device that only handles ...
rene.heijma@...
Jul 9, 2003 8:49 am
2641
Hello I want to know why any of the node should respond to the message sent by the master with acknowledgemnet, even if the message isn't meant to that ...
narasimha prasad
yanarasimhap@...
Jul 9, 2003 1:01 pm
2642
Hi Narasimha, If there is at least one node which is unhappy with the message, it would have sent out error frame before the acknowledgement slot, i.e. the...
Tang
xiong@...
Jul 9, 2003 2:55 pm
2643
The simple answer is "Because the authors of the CAN protocol designed it that way:" In slightly more detail... you only list the example of a 'one to one' ...
John Dammeyer
johnd@...
Jul 9, 2003 3:07 pm
2644
"That is 4 filters. I think all CAN-controllers have at least this number of filters." No, they don't. There are controllers out there with 1 and 2 filters (as...
Allen Pothoof
apothoof@...
Jul 9, 2003 3:41 pm
2645
Hi, I've run an experimental CAN like implementation at 2.6Mbps. The only real constraint is the bus length and propagation delay and that issue is there for...
John Dammeyer
johnd@...
Jul 9, 2003 3:44 pm
2646
Well, the first thing you need to realize is that, depending on your protocol, a message is not sent to A, that is 1, singular, node; it is sent to a subset of...
Allen Pothoof
apothoof@...
Jul 9, 2003 3:50 pm
2647
Hi all, I am investigating the operation of the CAN bus with speeds above 1Mbit/s (in case we need it for our closed-loop application). With our present CAN...
Osmar Yang
oy@...
Jul 9, 2003 3:50 pm
2648
Hi all, I am investigating the operation of the CAN bus with speeds above 1Mbit/s (in case we need it for our closed-loop application). With our present CAN...
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