Connecting devices via devicenet. What to answer to the master device?

Question

Arduino

There is a controller with an implemented Devicenet master and address 0. There is a shield for communicating via the CAN bus.
If you start the shield in the bus listening mode, then the following messages are received when the controller is
initialized : 0 48 5 75 0 48 0 75 3 1 1 0 0 75 3 1 1 0 5 75 0 48 5 75 0 48 0 75 3 1 1 0 0 75 3 1 1 0 then crashes with an initialization error. The controller contains the MAC address of one slave (shield connected via arduino to the computer) - 5.
It can be seen that calls are being made to it, but, it seems, according to the protocol standard, it does not provide for a handshake or confirmation of data receipt, so the crash looks like a mystery.
The master is configured to only send one byte of data to address 5. As a result, it is not clear where so many messages on the bus come from.
Maybe someone dealt with the protocol and tell me what the problem is? Shield
www.seeedstudio.com/wiki/CAN-BUS_Shield