06.03
10.3 System data
10-284
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
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
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
Timer
8
8
KV factor
9
9
Rotational feedrate
10
10
Compensation value of linear position
11
11
Compensation value of angle position
12
12
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]
Selected input
output unit
internal unit
MD : SCALING_FACTORS_USER_DEF[n]
1
m
min
1
mm
secs
1000mm
60secs
1
mm
secs
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/sec
2
, instead of m/sec
2
(default).
(The internal unit is mm/sec
2
.)
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