How to make 5 Mbps work? or how to change the "SSP offset" for PCAN-USB FD?

[ianasran]

Hi all,

I'd like to set up 5 Mbps on my USB FD, but could not make the communication work. My parameter settings are below.

SSP offset.png (63.58 KiB) Viewed 3808 times

CAN FD settings.png (135.81 KiB) Viewed 3808 times

I've read some articles that say changing the "secondary sample point offset", or SSP offset may work, but in PCAN-view this option is grey-out and I could not find a way to configure it.

Thank you.

[M.Heidemann]

Hello,

I'd like to set up 5 Mbps on my USB FD, but could not make the communication work

The communication to what exactly?

Especially with CAN-FD the bitrates need to be configured correctly for all nodes on the bus,
this includes the sampling point.

Can you describe us your setup in more detail?

Best Regards

Marvin

[M.Heidemann]

Hallo,

Any updates regarding this or was this resolved?

Best Regards

Marvin

[ianasran]

Hi Marvin,

Thank you for the follow up.
The topology now is just (PEAK PCAN-USB) -- (another CAN FD device)
I am checking if it's the problem of an unmatched sample point.

"Especially with CAN-FD the bitrates need to be configured correctly for all nodes on the bus,
this includes the sampling point."
For CAN FD data bit rate 5 Mbps I am using 75% sample point as the figure above, and checking the other device.
Just a check, is there a 'typical' or 'common' value for CAN FD data bit rate higher than 1 Mpbs?
Thank you.

Sincerely,
Tiffany

[M.Heidemann]

Hello,

Have a look at the predefined Bitrates in PCAN-View, they give an pretty good
idea on valid bitrate settings you would typically encounter.

Best Regards

Marvin