Siemens SINUMERIK 840D Function Manual page 208

P2: Positioning axes
6.6 Block change
<instant in time>:
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)
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"
Programming
ADISPOSA(<axis>[,<mode>,<window size>])
ADISPOSA:
<Axis>:
<mode>:
<window size>:
System variable for end-of-motion criterion
The effective end-of-motion criterion can be read using the system variable $AA_MOTEND.
208
Time of the block change, referred to the braking ramp as a %:
● 100% = start of the braking ramp
● 0% = end of the braking ramp, the same significance
as IPOENDA
Type: REAL
Tolerance window for end-of-motion criterion
Effectiveness: modal
Channel axis name (X, Y, ....)
Reference of the tolerance window
Type: INT
Value range: 0 Tolerance window not active
1 Tolerance window with respect to the set‐
point position
2 Tolerance window with respect to actual
position
Size of the tolerance window
Type: REAL
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA