HEIDENHAIN ND 231 B v.2 - Manual (Page 36)

36
Distance-to-Go Mode
Distance-to-Go Mode
Normally, the display shows the actual position of the encoder.
However, it is often more helpful to display the remaining
distance to an entered nominal position—especially when you
are using the display unit for machine tools and automation
purposes. You can then position simply by traversing to
display value zero.
You can access the distance-to-go display by entering the
code number 246 582.
Function of switching outputs A1 and A2
In the distance-to-go mode, switching outputs A1 (pin 15) and
A2 (pin 16) have a different function: they are symmetrical to
the display value zero. For example, if a switching point of
10 mm is entered in P62, output A1 switches at both +10 mm
and –10 mm. The figure below shows output signal A1 when
approaching zero from the negative direction.
Time curve of a signal for switching limit (A1) = 10 mm ,
t
d1
£ 30 ms, t
d2
£ 180 ms
Display Meaning
DELTA ON Distance-to-go display active
DELTA OFF Distance-to-go display not active
“Traversing to zero” with distance-to-go display
ä Select datum point 2.
ä Enter the nominal position.
➤ Move the axis until the display value is zero.
Path
t
d1
t
d2