Siemens SINUMERIK 840Di Function Manual page 876

Detailed Description
2.3 Emergency stop sequence
5. After elapse of a time configurable in machine data:
6. All machine axes are switched to follow-up mode within the control.
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 sequence of operations in the NC is started with interface signal
• 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
2-4
MD36620 $MA_SERVO_DISABLE_DELAY_TIME (cutout delay servo enable),
the servo enables of the machine axes are cancelled.
Please note the configuration rule below:
MD36620 $MA_SERVO_DISABLE_DELAY_TIME ≥
MD36610 $MA_AX_EMERGENCY_STOP_TIME
The machine axes are therefore no longer in position control.
DB10 DBX 56.1 (emergency stop).
After the machine axes are at standstill, the energy supply must be interrupted in
accordance with EN 418.
Note
The responsibility for interrupting the power supply rests with the machine manufacturer.
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.
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.
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Emergency Stop (N2)