8-8 CHAPTER 8: OPERATION
ALPHA ST320 S2
4. EMERGENCY STOP BUTTON
When there is an dangerous situation arising, pressing one of the emergency stop buttons starts actions
below and interrupts the bar feed system and the lathe (if interface wired accordingly):
• The 3 phases 220V AC to servo amplifier is interrupted;
• All the output signals of PLC are interrupted except Y04 (input signal of relay R1);
• An alarm e01 is arising at HMI.
When the emergency situation is fixed, release the emergency stop button and press the manual key on
the remote control to restart the bar feed system.
Emergency stop button on the remote control STP1
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