Siemens SINUMERIK 840Di sl - Page 454

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Appendix 01/2008
B Terms
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© Siemens AG 2008 All rights reserved.
A-454 SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition
Messages
All messages programmed in the part program and → alarms
detected by the system are displayed on the operator panel in plain
text with date and time, as well as the appropriate symbol for the
delete criterion. Alarms and messages are displayed separately.
Metric measurement
system
Standardized system of units: for lengths in millimeters (mm),
meters (m), etc.
N
NC
Numerical Control: Numerical control (NC) includes all components of
machine tool control: → NCK, → PLC, → HMI COM.
Note: CNC (computerized numerical control) would be more
appropriate for the SINUMERIK 840D or FM-NC controls:
computerized numerical control.
NCK
Numerical Control Kernel: Component of the NC control, which
executes → part programs and essentially coordinates the
movements on the machine tool.