I found that NAOJ network uses DNS, so I follow the instructions of "Ethernet Configuration Example 2" at page 50 of the manual. (last time we tried Example 1 and, apparently, it didn't work because of DNS).

Through serial port, the IPADDR command returns 192.168.11.121 for one controller and 10.68.10.241 for the controller labeled NM2.

I connect the controller with IP address 192.168.11.121.

HOSTNAME command returns: nf8752-295333

I change the hostname with the command HOSTNAME NF8752-001

Save the configuration with the SAV command

RESET

Try to ping NF8752-001, failed (it says: "Ping request could not find host NF8752-001")