Different COB-ID, Can-ID, and Node-ID

"Addresses" in CANopen

 

In CANopen there are different types of addresses (IDs ):

 

• COB ID

 

TheCAN ObJect IdEntifier addresses the message (= the CAN object) in the list of devices.
Identical messages have the same cob id. The cob id entries in the object directory contain

CAN identifier (can id) among others.

 

• CAN ID

 

The CAN Identifier identifies CAN messages in the complete network. The can id is part of

Cob id in the object directory.

 

• Node ID

 

The Node Identifier identifies the CANopen devices in the complete network. The Node ID is part

Of some predefined CAN IDs (lower 7 bits ).

 

 

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