EMERGENCY OFF (N2)
14.2 EMERGENCY STOP sequence
Turning, Milling, Nibbling
262 Function Manual, 11/2012, 6FC5397-1CP10-5BA0
14.2 EMERGENCY STOP sequence
Requirements
Actuation of the EMERGENCY STOP pushbutton or a signal derived directly from the button
must be taken to the control system (PLC) as a PLC input. In the PLC user program, this
PLC input must be transferred to IS "EMERGENCY STOP" (V2600 0000.1) in the NC.
Resetting of the EMERGENCY STOP pushbutton or a signal derived directly from the button
must be taken to the control system (PLC) as a PLC input. In the PLC user program, this
PLC input must be transferred to IS "Acknowledge EMERGENCY STOP" (V2600 0000.2) in
the NC.
Sequence in the NC
The predefined (in EN 418) sequence of internal functions implemented to obtain the
EMERGENCY STOP state is as follows in the control system:
1. Part program execution is interrupted. All axes and spindles are braked along a braking
ramp defined in MD36610 AX_EMERGENCY_STOP_TIME.
2. The IS "802-READY" (V3100 0000.3) is reset.
3. The IS "EMERGENCY STOP active" (V2700 0000.1) is set.
4. Alarm 3000 is set.
5. On expiry of a delay that is set for specific axes/spindles in MD36620
SERVO_DISABLE_DELAY_TIME (shutdown delay, controller enable), the controller
enable is cancelled. It must be noted that MD36620 must be specified at least as long as
MD36610.
Sequence on the machine
The sequence of EMERGENCY STOP functions on the machine is determined solely by the
machine manufacturer. Attention should be paid to the following points in connection to the
sequence on the NC:
● The sequence of operations in the NC is started with IS "EMERGENCY STOP" (V2600
0000.1). When the axes and spindles have come to a halt, the power supply must be
interrupted, in compliance with EN 418.
● The PLC I/Os (digital outputs) are not affected by the sequence in the NC. If individual
outputs are required to attain a particular state in the event of an EMERGENCY STOP,
the machine manufacturer must include functions for this purpose in the PLC user
program.
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