Yaskawa i80M Connecting Manual - Manual (Page 139)

20.2.20 DISPLAY LOCK (DLK # 30062) INPUT
This input is for preventing the output pulses of the control from being displayed on the external
current value display. While the DLK input contact is closed, even when the machine is con-
trolled automatically or manually, the external current value display (CRT-POS “EXTERNAL”)
does not change.
20.2.21 PROGRAM RESTART # 30063) INPUT
This input is used when a part program is to be started again after interruption, Close the
PRST input contact, turn on the memory mode, and search No. of program restart by the NG
operator’s station. The M/S/T codes present between the leading end of the program and the
searched sequence No. are displayed on the CRT.
20.2.22 DRY RUN (DRN #30064) INPUT
This input is for changing the feed rates of the tools during the execution of part programs in
the automatic mode to the rates selected by the manual continuous feed selection inputs (JV1,
JV2,
JV8 and
While the DRN input contact is closed, the feedrate during the execution of part programs in
the automatic mode are changed from the programmed ones to the ones selected by the manu-
al continuous feed selection inputs.
When the DRN input contact is closed or opened during the automatic operation of the con-
trol, the following changes take place.
During mm/rev feeding: No change of feedrate for the current block.
During mm/min feeding: Feedrate changes even during the current block.
During tapping, however, no changes occur in the middle of the current block. The input
takes effect after the execution of the current block is completed. For rapid traverse, either
rapid traverse or JOG speed can be chosen using a parameter. As for rapid traverse speed,
the rapid traverse override feature works.
The time constant is not affected by Dry Run ON/OFF.
●
Dry Run internal toggle switch D3
●
Dry Run ON/OFF for rapid traverse-Pm2000 DO
20.2.23 MACHINE LOCK (MLK #30066)
This is the input for preventing the output of control output pulses to the servo unit. While the
MLK input contact is closed, even when the logic circuit distributes pulses on the automatic and
manual operation modes, the machine does not move.
As the logic circuits distribute pulses,
the current value display changes with the instructions.
The control must be stopped while the MLK input is closed or opened. In other words, the
MLK input works only in the block stop or feedhold state.
This function can be used when final program check is to be performed with the actual
machine without moving the axes. With the AMLKX # 30840 to AMLK5 # 30844 inputs, it is
possible to activate the machine lock feature variously for all axes. When the MLK is turned
ON during SBK operations, the MLK input works on the next block after current-block stop.
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