01.99 1 Introduction - SINUMERIK 840C and its Operation
© Siemens AG 1999 All Rights Reserved 6FC5198-6AA60-0BP1
SINUMERIK 840C, OEM Version for Windows (BA)
1-7
1.5 NCK and MMC areas
Most of the individual user areas on the SINUMERIK 840C are in two main
groups:
• NCK areas
• MMC areas
The operating principle differs slightly for each of the groups. While the
SYSTEM 800 operating principle is used in the NCK, the user interface in the
MMC areas is oriented to the MS-Windows operating system.
The NC screen contains "machine displays" which present the user with
information communicated from the NCK or PLC. Reciprocally, all keyboard
input on the operator panel is relayed to the NCK or PLC.
The selection of an NCK area is indicated by the appearance of the mode in the
display.
Fig. 1-4 NCK area: Machine
NCK areas
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