HEIDENHAIN ND 286 - Manual (Page 3)

Measuring Series
The ND 282 display unit can calculate and display one of the following values from a
measuring series:
Smallest value (MIN), largest value (MAX), difference between largest and smallest
value (DIFF), last value measured (ACTL)
A new value is captured every 550 µs during a measuring series.
To start a measuring series:
➤ Press the MOD key repeatedly until the desired indicator starts blinking.
Example: to display the largest value, press MOD until MAX blinks.
➤ Confirm your selection by pressing ENT.
➤ Press MOD repeatedly until the START indicator blinks.
➤ Start the measuring series by pressing ENT.
You can switch between MIN, MAX, DIFF and ACTL at any time:
➤ Press MOD until the desired indicator blinks, then confirm with ENT. Or
➤ Use operating parameter P21 (see list of operating parameters).
Note:
When the switching input for remote control of the measuring series is active (pin 6
of D-sub connection EXT), you cannot switch over the display as described here.
To abort a measuring series and restart:
➤ Press MOD until START blinks, then confirm with ENT.
To end a measuring series:
➤ Press MOD until the glowing indicator blinks, then confirm with ENT.
It is also possible to start a measuring series and switch over the display with a
switching input over the D-sub connection EXT (see that section).
Sorting and Tolerance Check Mode
In this mode, the display value is compared with an upper and a lower limit value.
Status indicators and the switching outputs at the D-sub connection EXT indicate
whether the display value is less than the lower limit, greater than the upper limit, or
between the two limit values.
Indicator Meaning
= Measured value is between the limit values
< Measured value is less than the lower limit value
> Measured value is greater than the upper limit value
Operating parameters for the sorting mode:
•
P17: sorting on / off, P18, P19: limit values
Distance-to-go Mode
The standard setting for the display unit is to show the encoder position value.
Code number 246 582 provides access to the distance-to-go mode.
“Traverse to zero” with distance-to-go display
➤ Select datum 2.
➤ Enter the nominal position.
➤ Move the axis to the display value zero.
In distance-to-go mode the trigger outputs A1 (Pin 15) and A2 (Pin 16) change their
meaning: they become symmetrical to the display value zero.