Rx7i ic698bem731 gbc status

hi all

I have Rx7i CPE030 PLC with ic698bem731 gbc , I did little logic with BUS_RD_WORD , but couldn't able to find the GBC status correctly
http://support.ge-ip.com/support/res.../gfk0363ae.pdf
this is what I get from manual gfk03063ae

Data Returned by the VMERD
The function returns 32 bits; one for each potential serial bus address. The bit corresponding to the bus address of the Bus
Controller itself is always 0.


then how could I can extract data about GBC status

thanks in advance