Siemens sinumerik 840D sl Function Manual page 172

Example
4.4 Setting warning and trip limits
4.4 Setting warning and trip limits
As soon as the gantry grouping is set and synchronized, the following machine data must
still be set to correspond:
MD37110 $MA_GANTRY_POS_TOL_WARNING (gantry warning limit)
MD37120 $MA_GANTRY_POS_TOL_ERROR (gantry trip limit)
Proceed as follows
• Set the machine data for all axes with a large value to begin with:
• Set a very small value in the machine data:
• Now increase the following machine data:
In case the monitoring still only chimes very sporadically, one can program a centering
maker into the PLC user program.
Enter the value calculated for the warning limit + a small safety provision in the following
machine data:
MD37120 $MA_GANTRY_POS_TOL_ERROR (gantry trip limit)
Error limit values
Values are entered in the following machine data:
MD37110 $MA_GANTRY_POS_TOL_WARNING (gantry warning limit)
MD37120 $MA_GANTRY_POS_TOL_ERROR (gantry trip limit)
40
MD37120 $MA_GANTRY_POS_TOL_ERROR (gantry trip limit)
MD37110 $MA_GANTRY_POS_TOL_WARNING (gantry warning limit)
When you put a heavy, dynamic strain on the axes, always be careful to re-enter the self-
canceling alarm "10652 channel %1 axis %2 gantry warning limit exceeded".
MD37110 $MA_GANTRY_POS_TOL_WARNING (gantry warning limit)
Do this until the alarm no longer appears. The interface indicates the status specified
below. (That must occur in the appropriate window, according to production.)
Special functions: Gantry Axes (G1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0