Siemens SINUMERIK 840D sl Function Manual page 952

Detailed description
2.3 Emergency stop sequence
Sequence on 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:
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
• The fast digital outputs of the NCK I/O system are not influenced by the emergency stop
Note
If the sequence in the NC is not to be executed during an emergency stop as described
above, then the interface signal must not be set until an emergency stop state defined by
the machine manufacturer in the PLC user program is reached.
DB10 DBX56.1 (Emergency stop).
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.
10
DB10, DBX 56.1 (Emergency stop).
After the machine axes are at standstill, the energy supply must be interrupted in
accordance with EN 418.
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.
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 to DBB7.
Basic logic functions: Emergency Stop (N2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0