
B-63943EN-1/02 2.PREPARATIONS FOR OPERATION
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2.3 OVERTRAVEL CHECK
2.3.1 Overtravel Signals
Overview
When the tool tries to move beyond the stroke end set by the machine
tool limit switch, the tool decelerates and stops as a result of tripping
the limit switch, and an OVER TRAVEL is displayed.
Signal
Overtravel signals *+L1 to *+L8<Gn114>, *-L1 to *-L8<Gn116>
[Classification] Input signal
[Function] Indicates that the control axis has reached its stroke limit. There are
individual signals for each direction in every control axis.
The +/- in the signal name indicates the direction and the number
corresponds to the control axis.
+Lx
x
: 1 : No. 1 axis is at stroke limit.
2 : No. 2 axis is at stroke limit.
3 : No. 3 axis is at stroke limit.
:
:
8 : No. 8 axis is at stroke limit.
+ : Limit reached in + direction.
- : Limit reached in - direction.
[Operation] When it is "0" , the control unit operates as given below.
- In automatic operation, if even one axis overtravel signal turns to
"0", all axes are decelerated to stop, an alarm is given and
operation is halted.
- In manual operation, only the axis whose overtravel signal has
turned to "0" is decelerated to a stop, and the axis can be moved
in the opposite direction.
- 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.