Question #752   Submitted by Answiki on 10/26/2021 at 10:52:31 AM UTC

What is the CANopen message format?

Answer   Submitted by Answiki on 10/26/2021 at 10:59:23 AM UTC

A CANopen frame is composed of:

  • a 4 bits function code
  • a 7 bits CANopen node
  • a remote transfer bit (RTR)
  • 4-bit data length
  • and 0 to 8 bytes of data


The first part (Function code + Node ID + RTR) is called COB-ID for Communication OBject IDentifier.

4 events in history
Answer by Answiki on 10/26/2021 at 10:59:23 AM

A CANopen frame is composed of:

  • a 4 bits function code
  • a 7 bits CANopen node
  • a remote transfer bit (RTR)
  • 4-bit data length
  • and 0 to 8 bytes of data


The first part (Function code + Node ID + RTR) is called COB-ID for Communication OBject IDentifier.

Question by Answiki 10/26/2021 at 10:59:13 AM
How is built a CANopen frame?
Answer by Answiki on 10/26/2021 at 10:57:47 AM

A CANopen frame is composed of:

  • a 4 bits function code
  • a 7 bits CANopen node
  • a remote transfer bit (RTR)
  • 4-bit data length
  • and 0 to 8 bytes of data



The first part (Function code + Node ID + RTR) is called COB-ID for Communication OBject IDentifier.

Question by Answiki 10/26/2021 at 10:52:31 AM
What is the CANopen message format?
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