Siemens Sinumerik 840D sl Programming Manual page 287

4.11 Programmed end-of-motion criterion (FINEA, COARSEA, IPOENDA, IPOBRKA, ADISPOSA)
Further information
System variable for end-of-motion criterion
The effective end-of-motion criterion can be read using the system variable $AA_MOTEND.
References: /LIS2sl/ List Manual, Book 2
Block-change criterion: "Braking ramp" (IPOBRKA)
If, when activating the block change criterion "brake ramp", a value is programmed for the
optional block change instant in time, then this becomes effective for the next positioning
motion and is written into the setting data synchronized to the main run. If no value is
specified for the block change instant in time, then the actual value of the setting data is
effective.
SD43600 $SA_IPOBRAKE_BLOCK_EXCHANGE
IPOBRKA is deactivated for the corresponding access when an axis end-of-motion criterion
(FINEA, COARSEA , IPOENDA ) is next programmed for the axis.
Additional block-change criterion: "Tolerance window" (ADISPOSA)
Using ADISPOSA, a tolerance window around the end of block (either as actual or setpoint
position) can be defined as additional block change criterion. Then, two conditions must be
fulfilled for the block change:
• Block-change criterion: "Braking ramp"
• Block-change criterion: "Tolerance window"
References
For further information about the block change criterion for positioning axes, see:
• Function Manual, Extended Functions; Positioning Axes (P2)
• Programming Manual, Fundamentals; Chapter "Feedrate control".
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Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
Special Motion Commands
287