Siemens SINUMERIK 840Di Function Manual page 193

Supplementary Conditions
3.1 Rounding and repositioning (REPOS)
3.1
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
Continuous-Path Mode, Exact Stop, LookAhead (B1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
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
3-1