connect target sys/password
connect catalog <username/password>@<connect string>
alter session set nls_date_format='dd-mon-yyyy hh24:mi';
set echo on;
run
{
    allocate channel dev1   type disk format '<path>\db_t%t_s%s_p%p';
          select current_timestamp from dual; 
    allocate channel dev2   type disk format '<path>\db_t%t_s%s_p%p';
          select current_timestamp from dual;
    BACKUP archivelog all ;
          select current_timestamp from dual;
    delete noprompt archivelog all completed before 'sysdate-1';
          select current_timestamp from dual;
    release channel dev1 ;    
          select current_timestamp from dual;
    release channel dev2 ;    
          select current_timestamp from dual;

}

   channel dev1: specifying archived log(s) in backup set
   and
   channel dev1: starting piece 1 at <date and time> 

connected to target database: <name> (DBID=<Number>)
connected to recovery catalog database

allocated channel: dev1
channel dev1: SID=<ID> device type=DISK
Starting backup at <Date> 12:33:16
current log archived
channel dev1: starting archived log backup set

channel dev1: specifying archived log(s) in backup set