Siemens SINUMERIK 840Di Function Manual page 414

Detailed Description
2.3 Setpoint/actual-value system
Direct measuring system (DM) is on machine directly:
Indirect measuring system (IM) is on motor indirectly:
Depending on the type of axis (linear axis, rotary axis) and the type of actual-value
acquisition (directly at the machine, indirectly at the motor), the following machine data must
be parameterized to calculate the actual-value resolution:
Machine data
MD30300 $MA_IS_ROT_AX
MD31000 $MA_ENC_IS_LINEAR[n]
MD31010 $MA_ENC_GRID_POINT_DIST[n]
MD34320 $MA_ENC_INVERS[n]
MD31040 $MA_ENC_IS_DIRECT[n]
MD31044 $MA_ENC_IS_DIRECT2[n]
MD31020 $MA_ENC_RESOL[n]
MD31030 $MA_LEADSCREW_PITCH
MD31050 $MA_DRIVE_AX_RATIO_DENOM[n]
MD31060 $MA_DRIVE_AX_RATIO_NUMERA[n]
MD31070 $MA_DRIVE_ENC_RATIO_DENOM[n]
MD31080 $MA_DRIVE_ENC_RATIO_NUMERA[n]
- = Does not apply to this combination
* The encoder on the motor side is a built-in encoder and, therefore, does not have a measuring gear unit.
The transmission ratio is always 1:1.
2-40
Linear axis Linear axis
Linear scale/ Encoder
or as direct on
measuring motor
system
0 0
1 0
Spacing -
Opposite -
direction
- / (1) 0
- / (1) 0
- Pulses/
rev
- mm/rev.
- Load
rev.
- Motor
rev. if
infeed
gear
available
- Encoder
rev.
- Motor-
side
encoder*
Velocities, Setpoint/Actual-Value Systems, Closed-Loop Control (G2)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Load-side encoder
Motor-side encoder
Rotary axis
Encoder Encoder
on on
machine motor
and/or tool
0 1
0 0
- -
- -
1 0
1 0
Pulses/ Pulses/
rev rev
mm/rev. -
- Load
rev.
- Motor
rev.
Encoder Encoder
rev. rev.
Motor Motor
rev. rev.
Encoder
on
machine
and/or tool
1
0
-
-
1
1
Pulses/
rev
-
See
note
See
note
Encoder
rev.
Load
rev.