Siemens SINUMERIK 840D sl Programming Manual page 364

Glossary
Upper tolerance limit
When measuring a dimensional deviation as the upper tolerance limit (S_TU) ranging between
"2/3 tolerance of workpiece" and "Dimensional difference control", this is regarded 100% as
tool offset. The previous average value is deleted.
Weighting factor for averaging
The weighting factor k can be applied to allow different weighting to be given to an individual
measurement. A new measurement result thus has only a limited effect on the new tool offset
as a function of k.
Work offset (WO)
In the result of a measurement, the actual-setpoint value difference is stored in the data set of
any settable work offset.
Work offset range
This tolerance range (lower limit S_TZL) corresponds to the absolute value of maximum
random dimensional deviations. If the absolute value of the actual/set difference is less than
the work offset range, the offset is not applied.
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Programming Manual, 12/2017, 6FC5398-4BP40-6BA1
Measuring cycles