Siemens SINUMERIK 840D sl Function Manual page 588

Detailed description
2.4 Program test
Usage and Handling
Usage
The user can use this to check the programmed axis positions and auxiliary function outputs
of a part program. This program simulation can also be used as an extended syntax check.
Selection
This function is selected via the operator interface in the "Program control" menu.
This selection sets interface signal:
DB21, ...DBX25.7 (Program test selected).
This does not activate the function.
Activation
The function is activated via interface signal:
DB21, ... DBX1.7 (activate program test)
Display
The appropriate field on the operator interface is reversed and the interface signal in the PLC
as a checkback of the active program test:
DB21, ... DBX33.7 (program test active)
is set.
Caution
The signals for exact stop:
DB31, ... DBX60.6/60.7 (exact stop coarse/fine)
mirror the actual status on the machine.
They are only canceled during program testing if the axis is pushed out of its set position (the
set position remains constant during program testing).
With signal:
DB21, ... DBX33.7 (program test active)
both the PLC program and the part program can use variable
$P_ISTEST
to decide how to react or branch in response to these signals during testing.
Program execution without axis motion can also be activated with the function dry run
feedrate. With this function, part program sections with a small programmed feedrate can be
processed in a shorter time.
30
Basic logic functions: Mode group, channel, program operation, reset response (K1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0