Siemens Sinumerik 840DiE sl - Page 295

01/2007
11.3 System data
11-295
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
The following applies:
Defined inputoutput unit 
MD : SCALING_FACTORS_USER_DEF[n]*internal unit
Enter the actual value corresponding to the approached position in MD 10230:
SCALING_FACTORS_USER_DEF[n].
Table 11-7 Bit number and index for user definition
Physical unit
MD 10220:
Bit number
MD 10230:
Index n
Linear position 0 0
Angular position 1 1
Linear velocity 2 2
Angular velocity 3 3
Linear acceleration 4 4
Angular acceleration 5 5
Linear jerk 6 6
Angular jerk 7 7
Time 8 8
K
V
factor 9 9
Rev. feedrate 10 10
Compensation value linear position 11 11
Compensation value angular position 12 12
Example 1:
Machine data input/output of the linear velocities is to be in m/min instead of
mm/min (initial setting). The internal unit is mm/s.
MD 10220: SCALING_USER_DEF_MASK Bit2 = 1 is used to enter the scaling
factor for linear velocities as a user–defined value.
The scaling factor is calculated using the following formula:
MD : SCALING_FACTORS_USER_DEF[n] 
Defined inputoutput unit
internal unit
MD : SCALING_FACTORS_USER_DEF[n] 
1
m
min
1
mm
s

1000mm
60s
1
mm
s

1000
60
 16.667;
 MD : SCALING_FACTORS_USER_DEF[2]  16.667
Index 2 specifies the ”linear velocity” (see above).
Example 2:
In addition to the change of example 1, the machine data input/output
of linear accelerations, is to be performed in ft/s
2
, instead of m/s
2
(default). (the
internal unit is mm/s
2
).
11 NCK Commissionin
g
with HMI Advanced