The /SHUTDOWN command requires that any terminal that issues it be defined as either master or alternate console. Below is an example of defining a batch terminal as an alternate console in the CA 7 Initialization File.
TERM,NAME=BTERM1,DEVICE=BATCH,NLINE=60,LINLEN=137,CONS=ALTRN <---(CONS=ALTRN or MASTR)
As with most Initialization File changes, CA7 will need to be brought down and started again with TYPE=ERST to implement this change. Then on the SASSBSTR job that performs the shutdown, include the PARM=n on the EXEC statement to ensure it is routed to the batch terminal defined is MASTR or ALTRN (unless all of them are set up in this way).