Siemens SINUMERIK 840Di Manual page 284

10 NC Start-Up with HMI Advanced
10.3 System data
10-284
The following applies:
Selected input output unit +
MD : SCALING_FACTORS_USER_DEF[n] * internal unit
Enter the selected input/output unit expressed in the internal units 1mm,
1 degree and 1 sec in MD 10230: SCALING_FACTORS_USER_DEF[n].
Table 10-7 Bit number and index for user definition
Physical quantity
Linear position
Angular position
Linear velocity
Angular velocity
Linear acceleration
Angular acceleration
Linear jerk
Angular jerk
Timer
KV factor
Rotational feedrate
Compensation value of linear position
Compensation value of angle position
Example 1:
The machine data input/output of linear velocities is to be carried out in m/min,
instead of mm/min (default). The internal unit is mm/sec.
Via 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] +
MD : SCALING_FACTORS_USER_DEF[n] +
å 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/sec
(The internal unit is mm/sec
MD 10220: MD 10230:
Bit number Index n
0
1
2
3
4
5
6
7
8
9
10
11
12
Selected input output unit
internal unit
m 1000mm
1
min + 60secs
mm
1 1
secs
2
, instead of m/sec
2
.)
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
06.03
0
1
2
3
4
5
6
7
8
9
10
11
12
+ 1000
+ 16, 667;
mm
60
secs
2
(default).