HEIDENHAIN ND 760 E - Manual (Page 31)

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P20E1-E3
Define the functions of the switching inputs E1, E2, E3.
EXT. SET TO ZERO (default setting)
The axes X, Y, or Z are set to zero with a switching pulse
(0V at inputs E1, E2 or E3).
AXIS SELECTION
Depending on the condition of the switching inputs E1 and
E2, the EDM axis varies.
E1
E2 EDM axis
Low Low Z
High Low Y
Low High X
High High Z
The input E3 allows you to select the trigger point to be
effective for the output A2 (trigger point defined in P17 or
P18).
E3
Trigger point off
Low P18
High P17
The axes can no longer be set to zero.
P21 DEF.TP
Define the functions of the trigger points.
STANDARD (default setting)
Standard switching function
(switching functions TP3 and TP4 are not used)
TP3 + 4
The output A6 is assigned to switching point TP3 (no longer
to HOME). The output A7 is assigned to switching point TP4.
Both trigger points are referenced to workpiece datum = 0
(they can be used, for example, to change the generator
settings).
TP3 + 4 CODE
Function as described above (TP3 + 4).
The trigger points at the outputs A3, A4, A6, and A7 are
transmitted in coded form:
Output
Code Value
A3 Bit 0 2 0 = 1
A4 Bit 1 2 1 = 2
A6 Bit 2 2 2 = 4
A7 Bit 3 2 3 = 8
The assignment of code values to trigger points is described
in parameters P22 to P25.
P22 CODE 1
Code value for trigger point TP3.
Input range: 0 to 15
Default setting: 0
P23 CODE 2
Code value for trigger point TP4.
Input range: 0 to 15
Default setting: 0
Operating
Parameters
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