Just to clarify - negative response 7F... preceeded by a positive one is OK. Module behaviuor requires power on/off to get a positive frame again.
Error 10 40 ... doesn't appear anymore after I added header sent after full frame.
The only error is 84 00..., returned UNTILL positive response. After that 84 00 ... error is not returned - only 7F ... error, what is OK.
It seems that there is any problem with synchronisation after each power on/off.
I'll try look in details of both oscillograms (USB8476 and CANCardXL)
