This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ISO1050: CAN bus communication error

Part Number: ISO1050

Hi TI experts,

My customer is using ISO1050 now. In the past, they use one master and ten slaves in one CAN BUS.

Recently, they want to use one master and 30 slaves in one CAN BUS but failed. 

Testing results:

ISO1050 testing results

The result is a last part of a packet, which is collected from one of slave. Yellow line is TX(ISO1050 to F280049). Green line is RX(F280049 to ISO1050). Blue line is differential signal on the CAN BUS.

You can see that after a master signal is sent, all the slaves alse responded. But the fall time of blue signal is slow. Eventually, there are 6 cycles of wrong signals on the CAN BUS.

is it due to the connectors and shielded twisted pair they ues? (Capacitor value on the line is so big to make the fall edge slow?)