Be sure your bed is not close to your hotend before doing this. If it is, power down and move your bed down at least 15mm by turning the leadscrews.
In the gcode console in duet web control, run this:
G1 Z10 H2
This should move your bed DOWN away from the hotend 10mm.
If your Bed moves up, find the M569 P5 - 7 lines in your config.g file, and change the S0 to S1 for all 3 lines.
If only some steppers move the wrong direction, skewing the bed, you need to edit the lines only for those steppers.
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