PASANITY controls whether the CI and DSSI port sanity timers are
    enabled to permit remote systems to detect a system that has been
    hung at IPL 8 or above for 100 seconds. It also controls whether
    virtual circuit checking gets enabled on the local system. The
    TIMVCFAIL parameter controls the time (1-99 seconds).

    PASANITY is normally set to 1 and should be set to 0 only when
    you are debugging with XDELTA or planning to halt the CPU for
    periods of 100 seconds or more.

    PASANITY is only semidynamic. A new value of PASANITY takes
    effect on the next CI or DSSI port reinitialization.

    If CI or DSSI devices are not configured on your system, this
    parameter is ignored.