Siemens SINUMERIK 840D sl Function Manual page 934

Z2: NC/PLC interface signals
19.10 Positioning axes (P2)
DB31, ...
DBX63.1
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Corresponding to ...
DB31, ...
DBX63.2
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
Corresponding to ...
DB31, ...
DBX76.5
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
DB31, ...
DBD78
Edge evaluation: No
Function
Signal irrelevant for ...
Special cases,
errors, ...
Corresponding to ...
934
PLC-controlled axis
Signal(s) updated: Cyclic
Confirmation of the NC to the PLC that the axis is now controlled by the PLC.
DB31 ... DBX28.7 (PLC controls the axis)
System variable: $AA_SNGLAX_STAT
Axis stop active
Signal(s) updated: Cyclic
Signal from the NC to the PLC that the axis will be stopped.
Confirmation from the NC to the PLC that the axis has been stopped.
System variable: $AA_SNGLAX_STAT = 3 (single axis is interrupted)
DB31, ... DBX60.6 (exact stop coarse)
DB31, ... DBX60.7 (exact stop fine)
DB31 ... DBX63.2 (axis stop active)
DB31, ... DBX64.6 (traversing command minus)
DB31, ... DBX64.7 (traversing command plus)
System variable: $AA_SNGLAX_STAT
Positioning axis
Signal(s) updated: Cyclic
Confirmation from the NC to the PLC that the axis is a positioning axis.
F function (feedrate) for positioning axis
Signal(s) updated: when change
The axial feedrate programmed for the positioning axis.
The value specified by FC18 for 840D sl is not output.
DB31, ... DBX76.5 == 0 (axis is not a positioning axis)
If the positioning axis is traversed with the feedrate from the machine data, the NC does not
output an F function (feed) to the PLC:
MD32060 $MA_POS_AX_VELO (initial setting for positioning axis velocity)
DB31, ... DBX76.5 (positioning axis)
MD22240 $MC_AUXFU_F_SYNC_TYPE (output time of F functions)
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions