the built-in CANopen Master does only support ‘IF’ interface cards, not ‘CS’ cards.
But you can implement your own Master or Slave by library ArCan or CAN_lib
see
[Searching] CANopen wrapper library for CAN interface - Ask Questions - B&R Community
X20CS2770 is supported by ArCan or CAN_lib if you select Function model ‘cyclic stream’
