
2.SIGNAL DESCRIPTIONS HANDLING B-65395EN/01
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2.3.15 Direct Input Signals
NOTE
The following signals are not host-to-servo amplifier
module FANUC I/O Link interface signals.
(1) Emergency stop signal *ESP
[Classification] Servo amplifier module direct input signal
[Function] The host stops the servo amplifier module immediately.
[Operation] When the signal becomes 0, the servo amplifier module behaves as
follows:
1. Hosts stops servo amplifier module immediately.
2. A reset is performed after a stop.
3. The servo system cannot operate for as long as the emergency stop
signal is 0. So, the servo preparation completion signal SA is held
at 0. If the machine is shifted while the SA is 0, the shift is
reflected in the current coordinates in the servo amplifier module;
the current position will not be lost (follow-up).
4. Neither jog feed nor a function code command can be issued while
the emergency stop signal is 0.
(2) Overtravel signals *-OT and *+OT
[Classification] Servo amplifier module direct input signal
[Function] The host indicates that the controlled axis has reached the stroke limit
described below.
*-OT: The stroke limit in the negative direction has been reached.
*+OT: The stroke limit in the positive direction has been reached.
[Operation] When the signal becomes 0, the servo amplifier module behaves as
follows:
1. The controlled axis is stopped immediately by zero-speed-based
deceleration, and an OT alarm for the input direction is output. A
movement in the opposite direction can be made by jog feed or
handle feed. The execution of function code commands and the
reading of commands are stopped.
2. The direction in which the signal becomes 0 is memorized. Even
after the signal is returned to 1, the controlled axis is prevented
from operating in that direction until the OT alarm is reset.
(3) High-speed interlock signal *RILK
[Classification] Servo amplifier module direct input signal
[Function] The host stops all movement command-specified feed.
[Operation] While the signal is 0, the servo amplifier module resets the all
movement command-specified feed to 0 to stop controlled axis feed.
Axis movement is decelerated to a stop.
A move command remains valid even when the signal is 0. Movement
can be resumed immediately when the signal is set to 1 again. This does
not affect non-move commands.