
B-63943EN-1/02 2.PREPARATIONS FOR OPERATION
- 325 -
2.1 EMERGENCY STOP
Overview
If you press Emergency Stop button on the machine operator's panel,
the machine movement stops in a moment.
Fig. 2.1 (a) EMERGENCY STOP
This button is locked when it is pressed. Although it varies with the
machine tool builder, the button can usually be unlocked by twisting
it.
Signal
Emergency stop (input) *ESP<X008#4> (for the first machine group), <X008#0> (for the
second machine group), <X008#1> (for the third machine group), <Gn008#4>
[Classification] Input signal
[Function] Activating an emergency stop signal stops the machine instantly.
[Operation] When the emergency stop signal *ESP turns to "0", the emergency
stop is applied to the machine and the CNC is reset. This signal is
controlled by the B contacts of a pushbutton switch. The emergency
stop signal turns the servo ready signal (SA) to "0".
Overtravel detection by this CNC is handled by the stored stroke
check function, and a limit switch for normal overtravel detection is
not needed.
To prevent the machine from moving beyond the software limit
through servo feedback error, always install a stroke end limit switch
(shown in Fig. 2.1 (b) as follows).