The cable for BS was not connected as Ikeda-san said.
Today I found it was connected to the BIO cheker board. So, I connected the cable to the stepper driver circuit. 
After connecting the cable, I confirmed that web page of the Nport for BS-GAS and BS-IP could be seen from web browser.

Fig1: Nport for BS-GAS
Fig2: Nport for BS-IP