Description of CANopen-Interface
HYDAC ELECTRONIC GMBH
07.10.2010
Mat. No. 669824
Page 15 of 63
4.3 Object Dictionary
The object dictionary structures the data of a CANopen device in a clear tabular
arrangement. It contains all device parameters as well as all current process data,
which are accessible thereby also about the SDO.
Figure 4: Structure of the Object Dictionary
4.4 CANopen default identifier
CANopen devices can be used without configuration in a CANopen network. Just the
setting of a bus address and the baud rate is required. From this node address the
identifier allocation for the communication channels is derived.
COB-Identifier = Function Code + Node-ID
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0
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Function Code
Node-ID
Examples
Object
Function Code
COB-ID
Index Communication Parameter
NMT 0000bin 0
–
SYNC 0001bin 80h
1005
PDO1 (tx)
0011bin
181h – 1FFh
1800h