Emergency Stop Acknowledgement - Siemens SINUMERIK 840D sl Function Manual

N2: Emergency stop

11.5 Emergency stop acknowledgement

5. After the expiry of a paramaterized delay time, the servo enables of machine axes are reset.
The setting of the delay time is programmed in machine data:
MD36620 $MA_SERVO_DISABLE_DELAY_TIME (OFF delay of the controller enable)
The following setting rule must be observed: MD36620 ≥ MD36610
6. All machine axes are switched in the follow-up mode within the controller.
The machine axes are no longer in position control.
Emergency stop sequence at the machine
The emergency stop sequence 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 process in the NC is started using the interface signal:
DB10 DBX56.1 (Emergency stop)
After the machine axes have come to a standstill, the power supply must be interrupted, in
compliance with EN 418.
Note
The responsibility for interrupting the power supply rests with the machine manufacturer.
● The digital and analog outputs of the PLC I/O are not influenced by the emergency stop
sequence in the NC.
If individual outputs are required to attain a particular state or voltage level in the event of
an emergency stop, the machine manufacturer must implement this in the PLC user
program.
● The fast digital outputs of the NCK I/O system are not influenced by the emergency stop
sequence in the NC.
If individual outputs must assume a specific state in case of emergency stop, the machine
manufacturer must transmit the desired state to the NC in the PLC user program via
interface signals:
DB10 DBB4-7
Note
If the sequence in the NC is not to be executed as described above, then the interface
signal DB10 DBX56.1 (emergency stop) must not be set until an emergency stop state
defined by the machine manufacturer in the PLC user program is reached.
As long as the interface signal is not set and no other alarm is pending, all interface signals
are operative in the NC. Any emergency stop state defined by the manufacturer (including
axis-, spindle- and channel-specific emergency stop states) can therefore be assumed.
11.5 Emergency stop acknowledgement
The emergency stop control element may only be reset as a result of manual manipulation of
the emergency stop control element according to EN 418.
Resetting of the emergency stop control element alone must not trigger a restart command.
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions