VMS Help Sys Parameters, RECNXINTERVAL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    RECNXINTERVAL establishes the polling interval, in seconds,
    during which to attempt reconnection to a remote system.

    RECNXINTERVAL is a DYNAMIC parameter. On Alpha systems,
    RECNXINTERVAL is also an AUTOGEN parameter.