NCK start-up
10.2 System data
CNC Part 1 (NCK, PLC, drive)
100 Commissioning Manual, 11/2006, 6FC5397-2AP10-2BA0
10.2.2 Normalization of phys. units of machine data and setting data
Standard
Machine and setting data having a physical unit are interpreted in the input/output units listed
in the table "Scaling physical units of machine and setting data" by default, depending on the
scaling system (metric/inch).
The internally used units which the NC uses are independent and fixed.
Table 10-2 Normalization of phys. units of machine data and setting data
Physical unit Input/output units for the standard basic system Internally used unit
Metric Inch
Linear position 1 mm 1 inch 1 mm
Angular position 1 degree 1 degree 1 degree
Linear velocity 1 mm/min 1 inch/min 1 mm/s
Angular velocity 1 rpm 1 rpm 1 deg./s
Linear acceleration 1 m/s
2
1 inch/s
2
1 mm/s
2
Angular acceleration 1 rev/s
2
1 rev/s
2
1 degree/s
2
Linear jerk 1 m/s
3
1 inch/s
3
1 mm/s
3
Angular jerk 1 rev/s
3
1 rev/s
3
1 degree/s
3
Time 1 sec 1 sec 1 sec
Position controller servo gain 1 s
-1
1 s
-1
1 s
-1
Rev. feedrate 1 mm/rev 1 inch/rev 1 mm/degree
Compensation value linear position 1 mm 1 inch 1 mm
Compensation value angular position 1 degree 1 degree 1 degree
User-defined
The user can define different input/output units for machine and setting data.
For this purpose,
• MD10220 SCALING_USER_DEF_MASK (activation of scaling factors) and
• MD10230 SCALING_FACTORS_USER_DEF[n] (scaling factors of the physical
quantities)
allow you to set the adaptation between the newly selected input/output units and the
internal units.
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