Siemens SINUMERIK 840D sl Function Manual page 615

Preconditions
A part program with traversing blocks in the configured RESU working plane (e.g. 1st and 2nd
geometry axis of the channel) as well as the part program command for the RESU start has
been started in the 1st channel.
Functional sequence
1. Interrupt part program processing:
The part program processing / traversing movement may be interrupted any number of
traversing blocks after RESU start by NC stop.
2. Select reverse travel:
The selection of the reverse travel is by PLC interface signal:
DB21, ... DBX0.1 = 1 (forward / reverse)
3. Reverse travel:
The contour is traversed in the RESU working plane in the reverse direction with NC start.
Instead of the current machining program, RESU selects the automatically generated
RESU main program.
For more about RESU programs see Chapter "RESU-specific part programs".
4. End reverse travel:
Once the required program continuation point on the contour has been reached, reverse
travel is ended using NC stop.
5. Select forward travel (optional):
For forward travel, reverse travel must be deselected via PLC interface signal:
DB21, ... DBX0.1 = 0
6. Forward travel (optional):
The contour is traversed in the RESU working plane in the forward direction with NC start.
7. End forward travel (optional):
Once the required program continuation point on the contour has been reached, forward
travel is ended using NC stop.
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
TE7: Continue machining - retrace support
15.2 Functional description
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