Stopping the Viewing Server, BDCAS, or TDCAS
The MVS MODIFY command stops the viewing server, BDCAS, or TDCAS from the MVS console.
The following syntax is valid for the MODIFY command:

jobname
The viewing server, BDCAS, or TDCAS job name.
nnnn
Timer value that specifies the number of seconds to elapse before the current user and transaction load close down. The default value is 60 seconds.
IMMED
Timer value that specifies that the viewing server , BDCAS, or TDCAS is to stop immediately.
Note: In some situations, use of the IMMED parameter may prevent completion of normal shutdown processing and may cause an abend in the viewing server.