Why can't I identify the slave station

I'm a novice, and I don't understand a lot ，so I come to ask for your help. Thank you very much.The igh I installed is EtherCAT master 1.5.2 and uses a generic driver. I encountered the problem of slave identification error in slave identification. This is a headache for me, so I come to seek your advice.The kernel used is 5.10.76-xenomai. 
xml: 
$ ethercat slaves -v
=== Master 0, Slave 0 ===
Device: Main
State: INIT
Flag: E
Identity:
  Vendor Id:       0x00000000
  Product code:    0x00000000
  Revision number: 0x00000000
  Serial number:   0x00000000
DL information:
  FMMU bit operation: no
  Distributed clocks: yes, 64 bit
  DC system time transmission delay: 0 ns
Port  Type  Link  Loop    Signal  NextSlave  RxTime [ns]  Diff [ns]   NextDc [ns]
   0  MII   up    open    yes             -   2539282506           0           0
   1  MII   down  closed  no              -            -           -           -
   2  N/C   down  closed  no              -            -           -           -
   3  N/A   down  closed  no              -            -           -           -

 

looks like ethernet / driver problems.

-check dmesg for errors
-check "ethercat master" for lost frames

or

slave is buggy.

Thank you for your advice and wish you a happy life! I'm trying

share your xml file. You did update it with your vid and pid from ethercat slaves -v?

After listening to your opinion, I went to dmesg. It did have several errors. I tried to solve these problems and see if I could identify the slave station at last. Thank you very much for your help.