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11.92
2
Description of Functions
2.1
General
2.1.1
Overview
Hardware structure/data structure
The data relating to tool management are divided up as follows in the SINUMERIK 840/880
system:
SINUMERIK 880,
SINUMERIK 840 or
SINUMERIK 840C
operator panel
COM
Display program
NC
TO
Tool offset
Fig. 2.1
Distribution of the data required for tool management
The TO memory is assigned to the NC area; it is physically located in the link RAM. The tool
offsets for the individual cutting edges are stored in the TO memory. The current assignment
of the tool-holding magazine is kept in data blocks in the PLC area. The COM area contains,
amongst other things, the UMS (user memory submodule) where the display descriptions (link
© Siemens AG 1991 All Rights Reserved
SINUMERIK 840/880 (PJ)
DBs
Current
magazine
assign-
ment
6FC5 197-0AA40-1BP1
2 Description of Functions
2.1 General
UMS
PLC
2–1
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