
29. SAFETY FUNCTIONS
B–63682EN/01
NC FUNCTION
226
When the movable section has gone beyond the stroke end, a signal is
output, the axis decelerates to a stop, and overtravel alarm is displayed.
All directions on all axes has overtravel signals.
The movable section of the machine is parameter set in machine
coordinates value. If the machine moves beyond the preset range, it
decelerates to a stop and alarm is displayed. This function is valid after
manual reference point return at power on.
(X
2
, Y
2
)
(X
1
, Y
1
)
The shaded part is the
inhibition area.
This function can be used instead of hardware overtravel limit switch.
When both is equipped with, both are valid.
In the case of rapid traverse rate when the end point of positioning is in
the forbidden area, an alarm is given without moving the axis. (Previous
check)
An inhibition area can be specified inside or outside an area set by
parameter or by program. Command distance from the machine
coordinates zero point for limit positions. This function is valid after
manual reference point return right after the power on. When specifying
the limits with program, limits or axes X, Y can be set.
The inhibition area can be changed according to the workpiece. The
parameter decides whether the inhibition area is outside or inside the
specified area.
(I, J)
(X, Y)
(I, J)
(X, Y)
Outside is forbidden area Inside is forbidden area
29.2
OVERTRAVEL
FUNCTIONS
29.2.1
Overtravel
29.2.2
Stored Stroke Check 1
29.2.3
Stored Stroke Check 2
(G22, G23)