Siemens SINUMERIK 840D sl Function Manual page 207

Supplementary conditions
3.1 Rounding and repositioning (REPOS)
Repositioning within the rounding area
If the traversing motion of the path axes within the corner rounding area is interrupted for
traversing blocks with programmed rounding (part program command G641, G642, G643 or
G644), repositioning occurs as follows in the event of a subsequent REPOS operation,
depending on the current REPOS mode:
REPOS mode
Example
Two traversing blocks N10 and N20 with programmed rounding G641. In the rounding area,
the traversing motion is interrupted and the axes are subsequently traversed, e.g., manually
to the REPOS starting point. Repositioning on the contour takes place differently, depending
on the active REPOS mode.
Basic logic functions: Continuouspath Mode, Exact Stop, LookAhead (B1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Block start of interrupted traversing block
RMB
Block end of interrupted traversing block
RMI
Block end of interrupted traversing block
RME
Block end of interrupted traversing block
RMN
3
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