When two U2980s are used, does the chassis number need to be re-coded to be normal?

Dear rose
     When multiple eSpace U2980s exist on a LAN, the subrack IDs need to be planned uniformly. Before delivery, the subrack ID is set to 1 by default. If multiple eSpace U2980s are deployed, you must plan subrack IDs that ranges from 1 to 3.
   On the eSpace U2980, a subrack ID ranges from 1 to 3, and is determined by DIP switches 1, 2, 3, and 4 on the DIP adapter board, as shown in picture