Use the CCONNTIME statement to specify the amount of time that the FTP client waits after attempting to close a control connection before terminating it and reporting an error.
.-CCONNTIME 30--------. >>-+---------------------+------------------------------------->< '-CCONNTIME --seconds-'
CCONNTIME 60 ; wait 60 seconds
See the FTP command information in the z/OS Communications Server: IP User's Guide and Commands for a description of the timeout parameter that can be used to change the timer when FTP is started.