Siemens SINUMERIK 840D sl Function Manual page 951

Connection Conditions
See the hardware configuration guide (Operator Components Manual) for information on
connecting the emergency stop button.
References:
/BH/ Equipment Manual Operator Components
2.3 Emergency stop sequence
EN 418 standard
After actuation of the emergency stop control element, the emergency stop device must
operate in the best possible way to prevent or minimize the danger.
"In the best possible way" means that the most favorable delay rate can be selected and the
correct stop category (defined in EN 60204) can be determined according to a risk
assessment.
Emergency stop sequence
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.
2. Reset interface signal
3. Set the interface signal:
4. Alarm: "3000 Emergency Stop" is displayed.
5. The controller enables of the machine axes are reset, once a parameterized time has
6. All machine axes are switched to follow-up mode within the control.
Basic logic functions: Emergency Stop (N2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
All machine axes are braked in the relevant axis-specific parameterized time:
MD36610 $MA_AX_EMERGENCY_STOP_TIME (time of braking ramp in event of errors).
The maximum brake ramp that can be achieved is defined by the maximum brake current
of the respective drive. The maximum brake current is achieved by setting a setpoint = 0
(fast braking).
DB11, ... DBX6.3 (Mode group ready).
DB10, DBX106.1 (Emergency stop active).
lapsed in the machine data:
MD36620 $MA_SERVO_DISABLE_DELAY_TIME (switchoff delay controller enable).
Please note the configuration rule below:
MD36620 ≥ MD36610
The machine axes are no longer in position control during this.
Detailed description
2.3 Emergency stop sequence
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