Yaskawa YASNAC PC NC I/O Signal Function Manual - Manual (Page 55)

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YASNAC PCNC I/O Signal Function Manual Chapter 6: Operation Support Functions
6.9 Dry Run Input Signal
The input signal uses the manual jog feedrate selection input signals (JV1, JV2, JV4, JV8, JV16)
for the execution of a part program in automatic mode.
When a part program is executed in automatic mode with the DRN input signal “closed”, axis
feed is executed not by the feedrate specified in the part program but by the feedrate defined by
the manual jog feedrate selection input signals.
If the DRN input signal changes from “open” to “close” or from “closed” to “open” while the
PCNC isexecuting automatic operation, feedrate is changed according to the selected feed mode
as indicated below:
• In the “mm/rev” mode: The feedrate is not changed for the block presently executed.
• In the “mm/min” mode: The feedrate is changed even during the execution of commands in a
block.
Note: During the execution of a tapping cycle, the feedrate is not changed during the execution
of commands in a block and a new feedrate becomes valid after the completion of the
commands in the block.
Concerning a rapid feed, whether the rapid feedrate or jog feedrate is used can be selected
by the setting for a parameter. If rapid feedrate is selected, rapid feedrate override function
is not valid.
The acceleration/deceleration time constant is not influenced by whether or not the dry run
is turned ON.
<Parameters>
• Dry run internal toggle switch ON/OFF pm0000 D3
• Valid/invalid dry run for rapid feed pm2000 D0
Dry Run Input Signal DRN #30064