Continuing Machining - Siemens SINUMERIK 840D sl Function Manual

H1: Manual and handwheel travel
4.12 Retraction in the tool direction (JOG retract)
4.12.7

Continuing machining

AUTOMATIC mode
Before the aborted part program is continued with NC start in AUTOMATIC mode, all machine
axes with active measuring systems in the state "restored" or "not referenced" must be
referenced.
NOTICE
Possible axis position displacement
After the control runs up after a power failure, the axis positions for incremental measuring
systems are synchronized or restored corresponding to the setting in machine data. Once
the tool has been retracted in JOG retract machine function, axes whose positions have been
restored are referenced.
MDI mode and overstore
In the MDI mode and for the overstore function, machining can also be performed, without
referencing the axes, with restored positions. To do this, NC start with restored positions must
be enabled explicitly for a specific channel:
MD20700 $MC_REFP_NC_START_LOCK = 2
Block search at interruption point
The processing of the part program can be continued from the interruption point via a block
search at the interruption point. The last block of the main program level before the interruption
is available as interruption point.
A detailed description of the function and for the operation of the block search can be found
in:
References
Basic Functions Function Manual; Section "K1: Mode group, channel, program operation, reset
response" > "Block search" or "Block search type 5 SERUPRO"
Turning or Milling Operating Manual; Section "Workpiece machining" > "Starting machining at
a specific point"
Continue with NC start
With NC start in the AUTOMATIC or MDI mode, the processing of the part program is continued
from the selected position. The following actions are performed with regard to JOG retract:
● The retraction data is deleted.
● The NC/PLC interface signal is reset:
DB21, ... DBX377.5 = 0 (retraction data available)
● The current data environment is saved.
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Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions