Siemens SINUMERIK 828D Function Manual page 821

• 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 the 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 channel­specific emergency stop states) can therefore be
assumed.
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
N2: Emergency stop
11.4 Emergency stop sequence
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