CANopen and SAE J1939 network topologies

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1

Hello,

I have a question about CAN network topologies.

I have the following task to solve. I’m using an X90CP154 Safety variant. Currently, I have 32 CANopen participants on CAN 1, 5 CANopen Safety participants on CAN 2, and 2 J1939 participants on CAN 3. In my opinion, the system isn’t quite balanced.

Currently, I’m separating CANopen Safety, Non-Safety and SAE J1939.

Unfortunately, this is very time-consuming because I sometimes have to run long distances to the same point with both Safety and Non-Safety CAN.

My experience with setting up a CAN network correctly is still in its early stages.

Can the individual “protocols” CAN Safety, Non-Safety, and J1939 be mixed?

Can a CAN Safety network also have Non-Safety participants?

Is there a guideline (procedure) for setting up CAN topologies correctly, and what should I pay attention to?

I would be grateful for an answer or advice if anyone is familiar with this.

2

Hello Tobias,

in principal Can Open & Can Open Safety can be mixed on the same network.
We are strongly discouraging to mix them as there can be safety issues!

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Can Open & J1939 can be mixed but the connected devices need to be able to use the same baud rate.
The can identifier length of the interface must be set to match Can Open (11 bit)

3

Hi Christoph,

Thanks for your quick reply.

What a mess, that makes everything much more complicated.

Is the warning information from the AS help, or do you know where

I can find more information I could read up on to build a clean network?

4

i found the information here

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Regards

Stephan

5

Ok,

Thx Stephan.

I will have a look at this.