Siemens SINUMERIK 840D Simodrive 611 digital Startup Manual page 69

03/2006
Index No. Physical variable
0 Linear position
1 Angular position
2 Linear velocity
3 Angular velocity
4 Linear acceleration
5 Angular acceleration
6 Linear jerk
7 Angular jerk
8 Timer
9 Position controller loop gain
10 Revolutional feedrate
11 Linear position (compensation value)
12 Angular position (compensation value)
13 Cutting velocity
Fig. 6-2
Example In our example the user wishes to enter the linear velocity in m/min.
The internal physical variable is mm/s.
The scaling factor is calculated using the following formula:
The machine data must be entered as follows:
MD 10220: SCALING_USER_DEF_MASK = 'H4' (activates the new factor) and
MD 10230: SCALING_FACTORS_USER_DEF [2] = 16.6666667 (scaling factor
for linear velocity in m/min)
The machine data is automatically converted to these physical variables after
input of the new scale and power ON. The new values are displayed and can
then be saved.
The unit of the physical variables for programming in the part program is
specified in the Programming Guide.
© Siemens AG 2006 All Rights Reserved
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
Input/output
1 mm
1 degree
1 mm/min
1 rev/min
2
1 m/s
2
1 rev/s
3
1 m/s
3
1 rev/s
1 s
1 m/min∗mm
1 mm/rev
1 mm
1 degree
1 m/min
Input values for machine data
MD 10220
Scaling factor
activated?
yes
MD 10230
Scaling factor
Internal physical variable
Changing physical variables
1 m * 1000 mm * 1 min
[m/min] =
min * 1 m * 60 s
6 Programming the control
6.6 System data
Internal unit Scaling factor
1 mm 1
1 degree 1
1 mm/s 0.016666667
1 degree/s 6
2
1 mm/s 1000
2
1 degree/s 360
3
1 mm/s 1000
3
1 degree/s 360
1 s 1
1/s 16.66666667
1 mm/degree 1/360
1 mm 1
1 degree 1
1 m/min 1
no
Internal scaling
= 1000/60 [mm/s] = 16.666667
6
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