From now on, we offer our cus­tomers an exten­sion in the record­ing of CAN sig­nals by sup­port­ing the CAN FD pro­to­col.

CAN (Con­troller Area Net­work) is a net­work for com­mu­ni­ca­tion between con­trol units that does not rely on host com­put­ers. It is used for data trans­mis­sion and pri­mar­i­ly in vehi­cles. The CAN BUS stan­dard has been extend­ed in recent years by CAN FD (Flex­i­ble Data Rate).

With the CAN BUS mea­sur­ing card from ROTEC, CAN and OBD II sig­nals such as engine load, tem­per­a­ture or speed are record­ed and eval­u­at­ed in rela­tion to the tor­sion­al vibra­tion test. This means that exist­ing vari­ables can be includ­ed in the mea­sure­ment with­out the need for addi­tion­al sen­sor appli­ca­tions. The CAN stan­dard com­pris­es 2.0 A (11-bit iden­ti­fi­er) and 2.0 B (29-bit iden­ti­fi­er).

Since the com­mu­ni­ca­tion require­ments of the CAN BUS stan­dard with a max­i­mum trans­mis­sion rate of 1 Mbit/s and a max­i­mum of 8 user data bytes are no longer suf­fi­cient nowa­days, the CAN FD stan­dard was devel­oped.

This improved ver­sion of the CAN pro­to­col allows the trans­mis­sion of a max­i­mum of 64 user data bytes at up to 8 Mbit/s (the pro­to­col bits are still trans­mit­ted at 1 Mbits/s).

If the 8‑fold bit rate (8 Mbits/s) is used and 64 user data bytes are trans­mit­ted, the trans­mis­sion time is com­pa­ra­ble to a clas­sic CAN mes­sage with 8 user data bytes.

For a CAN FD mes­sage with a data length of 64 bytes and a trans­mis­sion rate of 8 Mbits/s, the net trans­mis­sion rate is approx. 6 Mbits/s.

ROTEC offers its cus­tomers with the help of a Vec­tor inter­face (VN1600 fam­i­ly) to record CAN FD sig­nals in par­al­lel to RAS­delta sys­tems.