Block Search With Calculation On Contour - Siemens sinumerik 840D sl Function Manual

Subfunctions
The two essential subfunctions of retrace support are the standard NC functions:

• Block search with calculation on contour

• Repositioning on the contour via shortest route (REPOS RMN)
2.5.1 Block search with calculation on contour
Meaning
The block search with calculation on contour launched implicitly by the RESU function as
part of retrace support serves the following purposes:
• Sets the program pointer to the part program block of the part program that was
• Calculates the axis positions on the basis of the programmed traversing blocks from the
• Collates the instructions programmed from the start of the part program to the target
All part program instructions which are not executed in the action block but are required for
retrace support in the part program must be entered manually in the RESU-specific retrace
support ASUB CC_RESU_BS_ASUP.SPF, e.g.:
• Synchronized actions
• M functions
A complete description of the "Block search" function is found in:
References:
/FB1/ Function Manual of Basic Functions; Mode Group, Channel, Program Operation Mode
(K1), Program test
Special functions: Retrace Support (TE7)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
positioned back using reverse/forward travel.
start of the part program to the target block
block, which are executed in the action block. These include:
– Auxiliary functions
– Tool change
– Spindle functions
– Feedrate programming
Detailed description
2.5 Retrace support
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