Parameters

 Keyword  Posn  Type        Description
 -------  ----  ----        -----------
 INP       1    CHARACTER   Input data object
    - GLOBAL.BINDS (the current binned dataset)
 OUT       2    CHARACTER   Output data object.
    -> GLOBAL.BINDS (the current binned dataset)
 PERIOD    3    REAL        Folding period.
 EPOCH     4    DOUBLE      Epoch of phase 0. This is the atomic
                            time of phase zero in days.
 BINS      5    INTEGER     Number of phase bins.
 WEIGHT    -    LOGICAL     Whether weighting is
                            required.