Siemens SINUMERIK 840D sl Function Manual page 148

G1: Gantry axes
2.2 "Gantry axes" function
Monitoring the synchronism difference
2 limit values can be specified for the synchronism difference.
Gantry warning limit
The gantry warning limit is set using the following machine data:
MD37110 $MA_GANTRY_POS_TOL_WARNING (gantry warning limit)
The "Alarm limit exceeded" message is displayed if the synchronism difference exceeds the
gantry warning limit. In addition, the NC/PLC-interface signal is set:
DB31, ... DBX101.3 == 1 (gantry warning limit exceeded)
After the alarm limit has been fallen below, the message and interface signal are
automatically reset.
Note
Gantry warning limit
If the "Alarm limit exceeded" message is not to be displayed, then a value of 0 should be
entered into MD37110.
Gantry trip limit
The gantry trip limit is set using the following machine data:
• for the synchronized gantry grouping:
MD37120 $MA_GANTRY_POS_TOL_ERROR
• for the non-synchronized gantry grouping:
MD37130 $MA_GANTRY_POS_TOL_REF
Alarm 10653 "Error limit exceeded" is displayed if the synchronism difference exceeds the
gantry trip limit. In addition, the NC/PLC-interface signal is set:
DB31, ... DBX101.2 == 1 (gantry trip limit exceeded)
The alarm is also displayed if the gantry grouping is jammed (no controller enable, gantry
grouping in the "Hold" state).
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Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions