
B–62073E–1/042. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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(d) Incremental Feed Distance Selection Signals: DIST0 to DIS26
[Classification]
Input signals
[Function] Selects the feed distance per step of incremental feed. Twenty seven binary code signals
correspond to feed distances as follows:
Feed distance = Least increment unit ×
26
i0
(2
i
Vi)
where
Vi = 0 when the DISTi signal is low
Vi = 1 when the DISTi signal is high
The feed distance can be specified in the range of 0 to 99,999,999. When a value outside
this range is specified, zero is assumed.
[Operation] Each time a step of incremental feed is executed (the feed axis and direction selection signal
is set low, then high), the tool is fed the distance specified by the signal.
CAUTION Since a value is entered in a specified increment unit, the actual feed distance depends on
the increment unit and the input system, metric or inch. An identical value may result in
different feed distances if the axes have different increment units.
NOTE A parameter can be specified so that the feed distance of incremental feed can be determined
by manual handle feed distance signals, MP1, MP2, MP4 instead of the DIST signals. See
Section 2.3.7, “Manual Handle Feed Signals.”
2.3.7 Manual handle feed signals
(a) Manual handle feed axis selection signals: HS1A, HS1B, HS1C, HS1D; HS2A, HS2B, HS2C, HS2D;
HS3A, HS3B, HS3C, HS3D
[Classification]
Input signals
[Function] Selects the axis of manual handle feed. A set of four code signals, A, B, C, and D is provided
for each manual pulse generator. (Up to three generators can be used.) The number in the
signal name indicates the number of the manual pulse generator to be used.
H S 1 A
1 ……First manual pulse generator
2 ……Second manual pulse generator
3 ……Third manual pulse generator
Code signals A, B, C, and D correspond to the feed axes as listed in the following table:
Manual handle feed axis selection
HSnD HSnC HSnB HSnA
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
No selection
(None of axis is fed)
1st axis
2nd axis
3rd axis
4th axis
5th axis
6th axis
(0: Signal low 1: Signal high)