Siemens SINUMERIK 840Di Function Manual page 1651

Dynamic response of an axis/spindle
The dynamic response of an axis is dependent on:
• The preset feed value (MD32060 POS_AX_VELO)
• The acceleration value (MD32300 MAX_AX_ACCEL)
• The acceleration characteristics
• The selected servo parameter set
Feeds (V1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Can be programmed in the part program with FA[axis]= ..., or a feed override
OVRA[axis]= ... in percent.
Programmable in synchronized actions using FA[Axis]= ....
Modifiable from the PLC by entering FRate, or overwriting the axial override.
Programmable indirectly in the part program by overwriting the machine data with
subsequent NewConfig, or directly using a percentage acceleration override
ACC[Axis]= ....
Modifiable indirectly in synchronized actions by overwriting the MD (no NewConfig
possible) or by executing an ASUB, or programmable directly using a percentage
acceleration override ACC[Axis]= ... (cannot be preset by the PLC).
The PLC has the same options as synchronized actions.
Programmable in the part program using BRISKA(axis), SOFTA(axis), DRIVEA(axis) and
JERKA(axis).
Not programmable in synchronized actions (only directly using an ASUB).
Cannot be preset by the PLC (only indirectly using an ASUB).
A parameter set describes the most important setting options for control purpose in the
servo.
It comprises, e.g., the following axis-specific/spindle-specific machine data:
Detailed Description
2.3 Feedrate control
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