Setting up new SCAN IP for SCAN LISTENER

first check -- srvctl config scan and it will give SCAN configuration IPs 
and after execute this - Copy and paste IP addresses of SCAN and enter , 

alter system set remote_listener='(DESCRIPTION=(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=TCPS)(HOST=&scan_ip1)(PORT=1523))
(ADDRESS=(PROTOCOL=TCPS)(HOST=&scan_ip2)(PORT=1523))
(ADDRESS=(PROTOCOL=TCPS)(HOST=&scan_ip3)(PORT=1523))))' scope=both sid='*';

after alter system register;

check scan_listener and listener - 

and you are done.