Siemens SINUMERIK 840Di Function Manual page 877

2.4 Emergency stop acknowledgement
2.4
EN 418 standard
The emergency stop control element may only be reset as a result of manual manipulation of
the emergency stop control element. Resetting of the emergency stop control element alone
must not trigger a restart command.
A machine restart must be impossible until each of the actuated emergency stop control
elements has been deliberately reset by hand.
Emergency stop acknowledgement
1. Interface signal DB10, DBX56.2 (acknowledge emergency stop) = 1
2. Interface signal DB11, ... DBX0.7 (Mode Group reset) = 1
Emergency Stop (N2)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Note
Both interface signals:
DB10, DBX56.2 (acknowledge emergency stop)
and
DB21, ... DBX7.7 (Reset)
must remain set together until the interface signal:
DB10, DBX106.1(emergency stop active)
has been reset.
The emergency stop state cannot be reset with the interface signal DB21, ... DBX7.7
(Reset) alone.
Detailed Description
2.4 Emergency stop acknowledgement
2-5