Hi
Its possible you have to trigger the bat or cmd file from any one of the application servers to stop / start the SAP instance.
In our environment we have one CI & 8 Application servers are connected (Windows based servers). from one of the windows server we have schudle the stop/start SAP & restart the windows OS every month offline backup day.
file location in \usr\sap\sid\dvebmgsxx\exe\stopsap.exe & startsap.exe
Stop the SAP system command -
stopsap name=SID nr=(Instance number) SAPDIAHOST=(IP or Remote hostname)
Start the SAP system command -
startsap name=SID nr=(Instance number) SAPDIAHOST=(IP or Remote hostname)
Still if you are having query just type the command stopsap you will get the help
Regards
Sriram