Signals From Axis/Spindle (Db31 - Siemens SINUMERIK 840D sl Function Manual

Z3: NC/PLC interface signals
25.2 G1: Gantry axes
DB31, ...
DBX29.5
Signal irrelevant for ...
Application example(s)
25.2.2

Signals from axis/spindle (DB31, ...)

DB31, ...
DBX101.2
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
Signal irrelevant for ...
Corresponding to ....
DB31, ...
DBX101.3
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
Signal irrelevant for ...
806
Disable automatic synchronization
Gantry synchronized axis
The automatic synchronization process can be disabled by sending a VDI signal to the axial
PLC → NC interface of the master axis. This always makes sense when the axes are not
activated by default. In this case, the synchronization process should also be started explicitly.
Gantry trip limit exceeded
The difference between the position actual values of the leading and synchronized axes has
exceeded the maximum permissible limit value. The axes in the gantry grouping are shut down
internally in the control. Alarm 10653 "Error limit exceeded" is also output.
The monitored limit value is derived from the following machine data:
● MD37120 $MA_GANTRY_POS_TOL_ERROR (gantry trip limit)
... if gantry grouping is synchronized.
● MD37130 $MA_GANTRY_POS_TOL_REF (gantry trip limit for referencing)
... if gantry grouping is not yet synchronized.
Note:
IS "Gantry trip limit exceeded" is output to the PLC via the PLC interface of the synchronized
axis.
The difference between the position actual values of the leading and synchronized axes is still
within the permissible tolerance range.
Gantry leading axis
MD37120 $MA_GANTRY_POS_TOL_ERROR (gantry trip limit)
MD37130 $MA_GANTRY_POS_TOL_REF (gantry trip limit for referencing)
DB31, ... DBX101.5 (gantry grouping is synchronized)
Gantry warning limit exceeded
The difference between the position actual values of the leading and synchronized axes has
exceeded the limit value defined by the following machine data:
MD37110 $MA_GANTRY_POS_TOL_WARNING (gantry warning limit)
The message "Warning limit exceeded" is also output.
Note:
IS "Gantry warning limit exceeded" is output to the PLC via the PLC interface of the synchron‐
ized axis.
The difference between the position actual values of the leading and synchronized axes is less
than the limit value defined with machine data:
MD37110 $MA_GANTRY_POS_TOL_WARNING (gantry warning limit)
Gantry leading axis
Signal(s) updated: Cyclic
Signal(s) updated: Cyclic
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions