Siemens SINUMERIK 840Di Function Manual page 227

The maximum value for acceleration with active jerk limitation is parameterized using a
factor calculated in relation to the axis-specific maximum value. This is used to generate the
maximum value for axis-specific acceleration with active jerk limitation that is taken into
account by the path planning component during preprocessing:
Acceleration[axis] =
MD32300 $MA_MAX_AX_ACCEL * MD32433 $MA_SOFT_ACCEL_FACTOR
2.8.2 Activation
2.8.2.1 Parameterization
Key statement
The maximum value for acceleration with active jerk limitation (SOFT/SOFTA) is
parameterized using the axis-specific machine data:
MD32434 $MA_SOFT_ACCEL_FACTOR
(scaling of the acceleration limitation with SOFT)
2.8.3 Programming
Key statement
The function is not programmable.
Acceleration (B2)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2.8 Acceleration with active jerk limitation (SOFT/SOFTA) (axis-specific)
Detailed Description
2-15