Siemens Sinumerik 840D Operating Turning page 233

Program control
5.1 Selecting the function "Program control"
By pressing the HSK 4 "Prog. Cntrl." the
"Programm control" window will be opened, like dis-
played below.
Navigate with the blue cursor-up and cursor-down
through the option fields.
To activate or deactivate a "program control" option
press the "SELECT"-key on the machine control
panel.
The following program control options are available:
Abreviation/ Scope
Program control
PRT The program is started and executed with auxiliary
no axis motion function outputs and dwell times. In this mode, the
axes are not traversed.
The programmed axis positions and the auxiliary
function outputs are controlled this way.
Note:
Program processing without axis motion can also
be activated with the function "Dry run feedrate".
DRY The traversing velocities programmed in conjunc-
Dry run feedrate tion with G1, G2, G3, CIP and CT are
replaced by a defined dry run feedrate. The dry run
feedrate also applies instead of the programmed
revolutional feedrate.
Caution:
Workpieces should not be machined when "Dry run
feedrate" is active because the altered feedrates
might cause the permissible tool cutting rates to be
exceeded and the workpiece or machine tool could
be damaged.
840D/828D SINUMERIK Operate
Section 5
Notes