Siemens Sinumerik 840D sl Programming Manual page 77

The currently effective offsets can be read with the following system variables:
System variable
$P_TOFFL [<n>]
$P_TOFF [<geometry axis>]
$P_TOFFR
$AC_TOFFL[<n>]
$AC_TOFF[<geometry axis>]
$AC_TOFFR
Note
The system variables $AC_TOFFL, $AC_TOFF and AC_TOFFR trigger an automatic
preprocessing stop when reading from the preprocessing context (NC program).
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
6.8 Programmable tool offset (TOFFL, TOFF, TOFFR)
Meaning
with 0 ≤ n ≤ 3 Reads the current offset value of TOFFL (for
n = 0) or TOFFL[1...3] (for n = 1, 2, 3) in the
preprocessing context.
Reads the current offset value of
TOFF[<geometry axis>] in the preprocess‐
ing context.
Reads the current offset value of TOFFR in the
preprocessing context.
with 0 ≤ n ≤ 3 Reads the current offset value of TOFFL (for
n = 0) or TOFFL[1...3] (for n = 1, 2, 3) in the
main run context (synchronized actions).
Reads the current offset value of
TOFF[<geometry axis>] in the main run
context (synchronized actions).
Reads the current offset value of TOFFR in the
main run context (synchronized actions).
Tool offsets
77