Siemens SINUMERIK 840D sl Programming Manual page 858

Work preparation
3.14 Path traversing behavior
SERUPRO approach with RMNBL
If an abort is forced during machining at any position, the shortest path from the abort point is
approached with SERUPRO approach and RMNBL so that afterward only the distance-to-go
is processed. The user starts a SERUPRO process at the interruption block and uses the JOG
keys to move in front of the problem component of the target block.
Note
SERUPRO
For SERUPRO, RMIBL and RMBBL are identical. RMNBL is not only limited to SERUPRO, but
is generally valid.
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Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming