Siemens SINUMERIK 840C - Manual (Page 1144)

01.99 12 Functional Descriptions
12.36.9 List of descriptions
b) Example of a special treatment in the case of axis-specific machine data:
// Conversion
//
// Special treatment of one axis (e.g. 2nd axis)
TEA1 n
// !!!TRICK 17!!!
2800 I=M · 0.3937
2801 M=I · 10
2802 I=M · 0.3937
// End of file
Section ”TEA1 n” (marked as TRICK) in example b) prevents the internal loop from being
executed, therefore allowing the conversion of each machine data individually.
General notes
• What will not be converted
Tool offsets P10-P32
Cycle data (e.g. measuring cycles)
IKA data
GI data
Inc-Var
• Rounding errors when converting
Most data to be converted are in FLP10 format and have to be converted into FXP4
format. Then data have to be converted using factor 25.4 or 1/25.4 with the following
conversion into the original FLP10 format. This may lead to rounding errors which will
become greater if more conversions are carried out.
• Overflows when converting
Overflows can incur when converting data e.g. work area limitation 9,999.9999 inch
253,999.974 mm. Input limit is 99,999.999 mm. Alarm is given and the maximum value is
stored, i.e. when next converting from the metric system to inch the work area limitation
would be at 3937.0078 inch and – apart from rounding errors – would remain there even
after further conversions.
• Tool offsets in the case of rotary axes
All tool offsets are converted. The user must himself ensure that tool offsets for rotary
axes are reconverted into ”degrees”.
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SINUMERIK 840C (IA)