Library /sys$common/syshlp/scacp$help.hlb SET, CHANNEL, Qualifiers, /EXCLUDE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /EXCLUDE[=(nodename1,nodename2,...)]

    Excludes channels to specific nodes, which you can specify
    using wildcards. Each node name can be accompanied by optional
    qualifiers to specify local and remote device names. If no local
    or remote device name is specified, all channels associated with
    the specified node are included.