Description of CANopen-Interface
HYDAC ELECTRONIC GMBH
07.10.2010
Mat. No. 669824
Page 12 of 63
4 CANopen information
CANopen was developed by the CiA and is standardized since at the end of 2002 in
the European standard EN 50325-4.
As communication method CANopen uses the layers 1 and 2 of the CAN standard
which was developed originally for the use in road vehicles (ISO 11898-2). In the
automation technology these are extended by the recommendations of the CiA
industry association with regard to the pin assignment and transmission rates.
In the area of the application layer CiA has developed the standard CAL (CAN
Application Layer).
Figure 1: CANopen classified in the ISO/OSI reference model
In case of CANopen at first the communication profile as well as a "Build instructions"
for device profiles was developed, in which with the structure of the object dictionary
and the general coding rules the common denominator of all device profiles is
defined.
