Yaskawa YASNAC PC NC I/O Signal Function Manual - Manual (Page 40)

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YASNAC PCNC I/O Signal Function Manual Chapter 5: Coordinate Systems
(b) High-speed type reference point return
When the high-speed type (automatic, amunual) is selected, once the reference point
return is executed, the second and later reference point returns are executed by the
positioning mode to the reference point which is determined in the first reference
point operation.
Fig. 5.2 Reference Point Return Sequence
(High-speed type, Second and Later Operation)
SUPPLEMENT
By setting parameters pm4003D6 and D7, it is possible to select the grid type for the second and
later reference point return operations.
(2) Reference Point Return Signals
The reference point return signals are described as follows:
(a) Second reference point return input signal
When the second reference point is ste by the shift amount from the first reference point.
(b) At the reference point output signal
When a numerically controlled axis exists at the reference point as a result of the reference
point return operation or the positioning to the reference point, the corresponding output
signals (ZPX to ZP5) are closed. Note that the output signal is closed only when the corre-
sponding axis exits in the range of +3 pulses from the reference point position.
(c) At the second reference point output signal
In the automatic operation, when an axis is positioned at the second reference point by the
execution of the “G30” command in a part program, the corresponding output signals
(2ZPX to 2ZP5) are closed to indicate that the axis is at the second reference point.
Feedrate Rapid traverse
Feedrate sequence