Siemens SINUMERIK 840D sl Function Manual page 240

Functions
2.7 Acceleration with programmed rapid traverse (G00) (axis-specific)
Reset response
Real-time-event path acceleration is deactivated on reset.
Supplementary conditions
Programming $AC_PATHACC in the part program automatically triggers a preprocessing
stop with REORG (STOPRE).
2.7 Acceleration with programmed rapid traverse (G00) (axis-specific)
2.7.1 Detailed Description
2.7.1.1 General Information
Frequently, the acceleration for the machine axes involved in the machining process must be
set lower than the machine's performance capability officially allows because of the
supplementary conditions associated with the specific process concerned.
For time-optimized traversing of the machine axes with programmed rapid traverse (part-
program instruction G00), a specific maximum value can be programmed for the axis-specific
acceleration.
JOG setup mode
This function does not affect acceleration in respect of a rapid traverse override in JOG
setup mode.
2.7.2 Activation
2.7.2.1 Parameterization
The maximum value for axis-specific acceleration with programmed rapid traverse is
parameterized (G00) using the axis-specific machine data:
MD32434 $MA_G00_ACCEL_FACTOR
(scaling of the acceleration limitation with G00)
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Basic logic functions: Acceleration (B2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0