
B–63443EN/02
4. RESET & EMERGENCY STOPPMC INTERFACE
131
When the tool moves beyond the stroke end set by the machine tool limit
switch, the tool decelerates and stops because of working the limit switch
and an OVERTRAVEL alarm is displayed.
Classification
Input signal
Function Indicates that the control axis has reached its stroke limit. There
are signals in every direction for every control axis. The ( in the
signal name indicates the direction and the number corresponds
to the control axis.
+ L 1
1: No.1 axis is at stroke limit
2: No.2 axis is at stroke limit
+: Reached a + direction stroke limit
– : Reached a – direction stroke limit
Operation
When it is “0”, the control unit operates as given below.
D In automatic operation, if even one axis overtravel signal
turns to “0”, all axis are decelerated to stop, an alarm is given
and operation is halted.
D In manual operation, only the axis whose overtravel signal
has turned to “0” is decelerated to stop, and the axis can be
moved in the opposite direction.
D Once the axis overtravel signal has turned to “0”, the axis
direction is registered. Even if the signal returns to “1”, it is
not possible to move that axis in that direction until the alarm
is cleared.
4.4
OVERTRAVEL
CHECK
4.4.1
Overtravel Signal
General
Signal
Over signal
*+LI to *+L2<G1114>
*–LI to *–L2<G1116>