Siemens SINUMERIK 840D sl Programming Manual page 176

Measuring Cycles for Milling and Machining Centers
5.3 CYCLE976 calibrate workpiece probe
The following additional parameters are also valid:
_VMS, _CORA, _TZL, _TSA, _FA and _NMSP.
_CORA only relevant for monodirectional probe.
Notice
The first time calibration is performed the default setting in the array of the probe is still "0".
For that reason _TSA>probe ball radius must be programmed to avoid alarm "Safe area
violated".
See also
Variable measuring velocity: _VMS (Page 2-14)
Offset angle position: _CORA (Page 2-14)
Tolerance parameters: _TZL, _TMV, _TUL, _TLL, _TDIF and _TSA (Page 2-15)
Measurement path: _FA (Page 2-16)
Multiple measurement at the same location: _NMSP (Page 2-19)
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Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Measuring cycles