
B-63323EN-1/03 2.PREAPARATIONS FOR OPERATION
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2.1 EMERGENCY STOP
If you press Emergency Stop button on the machine operator’s panel,
the machine movement stops in a moment.
Figure 2.1 (a) Emergency stop
For how to use the emergency stop button, see the manual provided by
the machine tool builder.
Signal
Emergency stop
*ESP<G000#4>
[Classification] Input signal
[Function] Movement of machine is stopped in emergency status.
[Operation] When this signal is set to 0, the CNC operates as described below.
1) Movement on a controlled axis is stopped immediately only when
deceleration by dynamic braking is applied.
2) After a stop, a reset occurs, and the reset in-progress signal is set to
1. See NOTE below.
3) While the *ESP signal is 0, servo control (position control) is not
applied. Therefore, servo ready signal SA is set to 0. The distance
moved by the machine during this time is reflected in the current
position of the CNC, so that the position data is not lost (follow-
up). After emergency stop clearance, operation can be restarted
without having to perform reference position return again.
4) While the *ESP signal is 0, automatic operation and manual
operation cannot be performed.
NOTE
By setting bit 0 (ENR) of parameter No. 2001, an
alarm can be issued instead of performing reset
based on the emergency stop signal. In this case,
operation 2 (reset) is not performed. An emergency
stop is cleared when the reset key on the MDI panel
is pressed or another reset signal (ERS, RRW) is set
to 1 after the emergency stop signal is reset to 1.
Even if the emergency stop signal is reset to 1, the
emergency stop signal is assumed to be 0 until a
reset is applied by some other means.
EMERGENCY STOP
Red