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Siemens SINUMERIK 840D sl Function Manual page 1562

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Z1: NC/PLC interface signals
19.1 Various interface signals and functions (A2)
DB19
DBX20.4
Recall alarm deleted
Edge evaluation: No
Signal state 1
Recall alarm deleted inactive
Signal state 0
Recall alarm deleted inactive
Note: The signal is not reset automatically, it must be set by the user via the PLC user program.
Application exam‐
Applies only to HMI Advanced
ple(s)
DB19
DBX20.6
Simulation active
Edge evaluation: No
Signal state 1
On entry to simulation = 1
Signal state 0
On exit from simulation = 0
Application exam‐
Can be evaluated by machine manufacturer in order to activate the test on NC start.
ple(s)
DB19
DBX20.7
Switch over MCS/WCS
Edge evaluation: No
Signal state 1
The coordinate system is switched over from workpiece coordinate system (WCS) to machine coor‐
dinate system (MCS) or from MCS to WCS.
After it has been set, the signal is active for one PLC cycle.
Signal state 0
No effect
Application exam‐
The interface signal:
ple(s)
DB19, DBX20.7 (switch over MCS/WCS)
must be transferred to the interface signal:
DB19, DBX0.7 (actual value in WCS)
in order that the switchover becomes effective.
Corresponding to ...
DB19, DBX0.7 (actual value in WCS)
DB19
DBB22
Displayed channel number from HMI
Edge evaluation: No
DB19
DBB24
Actual image number of the JobShop interface
Edge evaluation: No
DB19
DBX26.1
OK Part program handling status)
Edge evaluation: No
Signal state 1
Transfer correctly completed
1562
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions

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