The Planar Configuration attribute (0028,0006) is only used in DICOM colour images, and specifies how the pixel data are arranged.
If the Value is 0, then they are grouped by location, e.g.
RGBRGBRGBRGBRGB
If the Value is 1, then they are grouped by sample, e.g.
RRRRR……GGGGG…….BBBBB…..
In this latter case, they are still grouped by frame in a multi-frame image, so the order would be:
etc…