Siemens SINUMERIK 840D sl Commissioning Manual page 232

NC commissioning
8.1 Machine and setting data
Effectiveness
The effectiveness of a machine data item specifies when the change becomes active:
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Changes to the setting data always take effect immediately.
A complete description of the machine data and setting data is provided in the List Manual
Machine Data and Parameters
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232
The SINUMERIK Operate Online Help provides a context-related description of the
machine data and setting data.
The changed machine data require an "NCK Reset" to become effective.
The changed machine data must be activated by pressing the <RESET> key.
The changed machine data must be activated by pressing the "Apply MD" softkey.
The changed machine data becomes active immediately.
(https://support.industry.siemens.com/cs/ww/en/view/
Commissioning Manual, 12/2019, A5E48312804B AA
CNC Commissioning: NC, PLC, Drive