Machine Data Numbers - Siemens SINUMERIK FM-NC Installation And Startup Manual

11 Data Backup
11.8 Line checksums and MD numbers in MD files (software version 3.2 and higher)
Evaluation of line
checksums
11.8.2

Machine data numbers

Archive files
Evaluation of MD
numbers
11.8.3 Aborting MD import
Control reactions
11-282
No write authorization is required to read in machine data files with valid line
checksums.
To load
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machine data without line checksum,
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modified MD values with deleted line checksum and
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MD files from SW version 1 or 2,
it is necessary to have the "Manufacturer" write authorization.
When loading machine data files, the user can select how the system should
respond to errors in the machine data file. See Aborting of MD import 11.8.3.
If the file contains incorrect values, then the current values are never overwrit-
ten.
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Machine data numbers are positioned as block numbers (e.g. N20070) in
front of an MD assignment line.
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There is a blank between the machine data number and MD assignment.
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The MD number refers to the machine data in total. Any existing field values
are not represented in the MD number.
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It is possible to select/deselect the generation of MD numbers in front of MD
assignment lines in INI and TEA files.
– MD 11230 MD_FILE_STYLE Bit 1 = 1
– MD 11230 MD_FILE_STYLE Bit 1 = 0
When machine data files are read back in, the control evaluates the MD num-
bers as follows:
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If errors are detected in the MD files when they are read in, the MD number
is displayed as the block number with the corresponding alarm.
If, during the import of machine data files (INI files) to controls with machine data
are read in
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which contain errors
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which do not match the checksum,
then alarms are generated and the import process aborted in some cases. You
can use MD 11220 INI_FILE_MODE to select the control behavior as follows:
SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
generate MD number
do not generate MD number.
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