SD 42440: FRAME_OFFSET_INCR_PROG
DOCONCD中解释如下：
0: When incremental programming is used on an axis, only the programmed position delta is traversed after a frame change. Zero offsets in FRAMES are only traversed when an absolute position is specified.
1: When incremental programming is used on an axis, changes to zero offsets are traversed after a frame change (standard response up to software version 3).

即SD42440=0，按增量走，不包括零偏。