HEIDENHAIN ND 231 B v.1 - Manual (Page 36)

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Switching Inputs EXT (X41)
Setting and zero resetting the display
With an external signal, you can set the display to the value
selected in parameter P79 (pin 3) or reset each axis to zero (pin 2).
Enabling and disabling REF mode
Operating parameter P85 allows you to activate the input
(pin 25) which will be used for setting the display externally to
REF mode when the unit is switched on or when the power is
restored after an interruption. The next signal deactivates REF
mode again (switchover function).
Ignoring reference mark signals
If this input (pin 4 or pin 24) is active, the display will ignore all
reference mark signals. A typical application of this function is
for measuring lengths with a rotary encoder and spindle; in
this case, a cam switch releases the reference mark signal at
a preset position.
Selecting the display information
You can select the display information of the ND 231 B
•
through switching inputs (see D-sub connection EXT) or
• with the operating parameters P06 (see Operating
Parameter list).
If you use the switching inputs, the setting of P06 has no
influence on the display information.
If none of the inputs for the selection of display information
(pin 6 to pin 9) is active, or if more than one is active, then the
settings of the operating parameter P06 apply:
•
Position if the encoder on X1: P06 = DISPLAY X1
• Position if the encoder on X2: P06 = DISPLAY X2
• Sum display: P06 = X1 ADD. X2
• Difference display: P06 = X1 SUB. X2