Siemens SINUMERIK 840D sl Function Manual page 736

Z3: NC/PLC interface signals
21.2 Gantry Axes (G1)
DB31, ...
DBX101.5
Application example(s)
Corresponding to ....
DB31, ...
DBX101.6
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
Corresponding to ....
DB31, ...
DBX101.7
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
Corresponding to ....
736
Gantry grouping is synchronized
Machining should be enabled only if the gantry axes are already synchronized. This can be
implemented in the PLC user program by combining NC Start with IS "Gantry grouping is
synchronized".
DB31, ... DBX29.4 (gantry synchronization ready to start)
DB31, ... DBX60.4 and 60.5 (referenced/synchronized 1 / 2)
MD37140 $MA_GANTRY_BREAK_UP (invalidate gantry axis grouping)
Gantry leading axis
The axis is defined as the leading axis within a gantry axis grouping (see MD37100).
Note:
The following interface signals are evaluated or output to the PLC via the PLC interface of the
gantry leading axis:
DB31, ... DBX29.4 (gantry synchronization ready to start)
DB31, ... DBX101.5 (gantry grouping is synchronized)
The axis is defined as the synchronized axis within a gantry axis grouping (see MD37100).
It is not possible to traverse a synchronized axis directly by hand (in JOG mode) or to program
it in a part program.
Note:
The following interface signals are output to the PLC via the PLC interface of the gantry
synchronized axis:
DB31, ...DBX101.3 (gantry warning limit exceeded)
DB31, ...DBX101.2 (gantry trip limit exceeded)
The NCK does not evaluate individual axial PLC interface signals for the synchronized axis.
MD37100 $MA_GANTRY_AXIS_TYPE (gantry axis definition)
DB31, ...DBX101.7 (gantry axis)
Gantry axis
The axis is defined as a gantry axis within a gantry axis grouping (see MD37100).
The PLC user program can read IS "Gantry leading axis" to detect whether the axis has been
declared as a leading or synchronized axis.
The axis is not defined as a gantry axis (see MD37100).
MD37100 $MA_GANTRY_AXIS_TYPE (gantry axis definition)
DB31, ... DBX101.6 (gantry leading axis)
Signal(s) updated: Cyclic
Signal(s) updated: Cyclic
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions