Siemens SINUMERIK 840D sl Function Manual page 1557

DB19
DBX0.2 Key disable
Edge evaluation: No
Signal state 1 or edge The keyboard is disabled for the user.
change 0 → 1
Signal state 0 or edge The keyboard is enabled for the user.
change 1 → 0
Application exam‐ If the screen is darkened with the interface signal: DB19 DBX0.1 (darken screen), the keyboard
ple(s) should be actuated simultaneously with the interface signal: DB19 DBX0.2 (key disable) to avoid an
unintended operation.
Corresponding to ... DB19 DBX0.1 (darken screen)
DB19
DBX0.3 Clear cancel alarms
Edge evaluation: No
Signal state 1 or edge Clear error key on the machine control panel is pressed.
change 0 → 1 All cancel alarms of the NCKs and the control panel are then acknowledged. The PLC application
acknowledges the PLC alarms itself.
Power On and Reset alarms remain active on the NCK until the cause of the error has been removed.
Signal state 0 or edge Clear error key on the machine control panel is not pressed.
change 1 → 0
Functionality Only valid for HMI Advanced.
Corresponding to ... DB19 DBX20.3 (cancel alarm cleared)
DB19
DBX0.4 Clear recall alarms
Edge evaluation: No
Signal state 1 or edge Clear error key on the machine control panel is pressed.
change 0 → 1 All cancel alarms of the NCKs and the control panel are then acknowledged. The PLC application
acknowledges the PLC alarms itself. POWER On and Reset alarms remain active on the NCK until
the cause of the error has been removed.
Signal state 0 or edge Clear error key on the machine control panel is not pressed.
change 1 → 0
Application exam‐ Applies to HMI Advanced only
ple(s)
Corresponding to ... DB19 DBX20.4 (recall alarm cleared)
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Z1: NC/PLC interface signals
19.1 Various interface signals and functions (A2)
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