HEIDENHAIN ND 286 - Manual (Page 2)

Select datum 1 or 2.
Enter a value, such as 40.
You can switch from one datum to the other at any time.
Use datum 2 when you want to display incremental values.
4 0
Confirm entered value.
The ND 286 position display unit is designed for use with HEIDENHAIN linear or
rotary encoders with square-wave output signals. These encoders have one or more
reference marks, which may also be
distance-coded.
When a reference mark is crossed over, it generates a signal identifying that position
as a reference point. After switch-on, simply crossing over the reference mark
restores the relationship between axis positions and display values as it was last
defined by datum setting.
With distance-coded reference marks, a maximum traverse of only 20 mm suffices to
re-establish the datum.
Switch-On
0 ➤1
Ent...CL
Switch on reference mark evaluation.
• Display shows the value last assigned to the
reference mark position.
• REF indicator glows.
• Decimal point blinks.
Cross over reference mark.
Move the axis until the display becomes active and the
decimal point no longer blinks.
5 , 6 9 7
Turn on the power (switch located on rear panel).
• Display shows
.
• REF indicator blinks.
• Data interface shows ERROR 07
If you do not wish reference mark evaluation, press CL instead of ENT.
Setting the Datum
The datum setting procedure assigns a display value to a specific axis position.
The ND 286 allows you to set two independent datums.