HEIDENHAIN ND 287 User Manual - Manual (Page 40)

40
I Working with the ND 287 position display unit
I – 4 J
o
b Set
u
p
Function of external inputs
Use FUNCTION EXT. INPUTS in the JOB SETUP menu to determine
the ND 287's reaction to the external inputs at connection X41 (see
"Switching inputs at D-sub connection X41" on page 93).
 In the JOB SETUP menu, select FUNCTION EXT. INPUTS and press
the ENTER key to open the form.
 Press the VERSION soft key. Two different versions are available:
 VERSION 1: You can externally activate the minimum/
maximum measurement for measurement series
if the signal
at pin 6 remains permanently LOW. The SELECT DISPLAY soft
key for selecting the display mode becomes ineffective. Pin 7
sets the display to MIN, pin 8 to MAX and pin 9 to DIFF. The
display can only be set to ACTL if either none of the pins 7, 8 or 9
or more than one of the pins carries a signal. A signal (pulse) at
pin 5
starts a new series of measurements if the signal at pin 6
is permanently LOW.
 VERSION 2: If pins 5, 6, 7, 8 or 9 are activated, the display modes
are switched to operation with two axes
. Pin 6 switches to
axis X1, pin 7 to axis X2, pin 8 to the sum of the two axes X1+X2,
pin 9
to the difference between the two axes X1-X2 and pin 5
switches to the definable relationship between the two axes
f(X1,X2)
, see "Formula for coupled position" on page 78.
An overview of the switching inputs and outputs is provided on
Page 93.
Danger to internal components!
 The power supply of external circuits must comply with
EN 50178 requirements for low voltage electrical
separation
.
 Connect inductive loads only with a quenching diode
parallel to the inductance
.
Danger to internal components!
Use only shielded cables and connect the shield to the
connector housing
.
The function for hiding possible display modes of the axes
(see page 78) is always active.
Fig. I.33 External inputs function