Siemens SINUMERIK 840D Simodrive 611 digital

6 Pro
g
rammin
g
the control
6
03/2006
6.6 System data
6-69
© Siemens AG 2006 All Rights Reserved
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
Index No.
Physical variable Input/output Internal unit Scaling factor
0 Linear position 1 mm 1 mm 1
1 Angular position 1 degree 1 degree 1
2 Linear velocity 1 mm/min 1 mm/s 0.016666667
3 Angular velocity 1 rev/min 1 degree/s 6
4 Linear acceleration 1 m/s
2
1 mm/s
2
1000
5 Angular acceleration 1 rev/s
2
1 degree/s
2
360
6 Linear jerk 1 m/s
3
1 mm/s
3
1000
7 Angular jerk 1 rev/s
3
1 degree/s
3
360
8 Timer 1 s 1 s 1
9 Position controller loop gain 1 m/min∗mm 1/s 16.66666667
10 Revolutional feedrate 1 mm/rev 1 mm/degree 1/360
11 Linear position (compensation value) 1 mm 1 mm 1
12 Angular position (compensation value) 1 degree 1 degree 1
13 Cutting velocity 1 m/min 1 m/min 1
Input values for machine data
Internal physical variable
MD 10230
Scaling factor
MD 10220
Scaling factor
activated?
Internal scaling
no
yes
Fig. 6-2 Changing physical variables
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:
min * 1 m * 60 s
= 1000/60 [mm/s] = 16.666667
1 m * 1000 mm * 1 min
[m/min] =
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.
Example