Siemens SINUMERIK 840D sl Commissioning Manual page 106

NCK start-up
10.2 System data
The following applies:
Input/output unit selected=
MD: SCALING_FACTORS_USER_DEF[n] * internal unit
In MD10230 SCALING_FACTORS_USER_DEF[n], the selected I/O device must be entered
expressed in the internal units mm, 1 degree and 1 sec.
Table 10-3
Physical unit
Linear position
Angular position
Linear velocity
Angular velocity
Linear acceleration
Angular acceleration
Linear jerk
Angular jerk
Time
K
V
Rev. feedrate
Compensation value linear position
Compensation value angular position
Example 1:
Machine data input/output of the linear velocities is to be in m/min instead of mm/min (initial
state). The internal unit is mm/s.
MD10220 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:
106
Bit number and index for user definition
factor
MD10220 bit number MD10230 index n
0
1
2
3
4
5
6
7
8
9
10
11
12
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
0
1
2
3
4
5
6
7
8
9
10
11
12
IBN CNC: NCK, PLC, drive