
12. AUTOMATIC OPERATION
B–63443EN/02
PMC INTERFACE
176
When the machine lock signal MLK turns to “1”, operation is controlled
and the moving command does not output to the servo whatever in
manual or automatic operation. The program continues to execute,
performing all operations except the output of servo commands. The
modal G codes and the position display are updated. This function is used
to check the program, and is only performed for move commands. M, S,
or T function is executed normally, and the FIN signal is sent to the CNC.
When the MLK signal turns to “1”, then “0”, during pulse distribution,
it is enabled immediately. The machine axes’ movement are accelerated
(“1”) and decelerated (“0”) by the signal changes.
When the MLK signal turns to “1” and automatic reference position return
(G28) is commanded, positioning command value is displayed on the
CRT but reference position return distance is not shown.
Command
speed
Position
display
MLK
OFF
Machine
movement
MLK
ON
12.7
MACHINE LOCK
SIGNAL (INPUT) MLK
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