G2: Velocities, setpoint / actual value systems, closed-loop control
7.4 Setpoint/actual-value system
Basic Functions
364 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Machine data Linear axis Linear axis Rotary axis
Linear scale/
or as direct
measuring
system
Encoder
on
motor
Encoder
on
machine
and/or tool
Encoder
on
motor
Encoder
on
machine
and/or tool
MD30300 $MA_IS_ROT_AX 0 0 0 1 1
MD31000 $MA_ENC_IS_LINEAR[n]
MD31010 $MA_ENC_GRID_POINT_DIST[n]
MD34320 $MA_ENC_INVERS[n]
1
Spacing
◆
0
-
-
0
-
-
0
-
-
0
-
-
MD31040 $MA_ENC_IS_DIRECT[n] - / 1 0 1 0 1
MD31044 $MA_ENC_IS_DIRECT2[n] - / 1 0 1 0 1
MD31020 $MA_ENC_RESOL[n] - Pulses/
rev
Pulses/
rev
Pulses/
rev
Pulses/
rev
MD31025 $MA_ENC_PULSE_MULT[n] Encoder multiplication
MD31030 $MA_LEADSCREW_PITCH - mm/rev. mm/rev. - -
MD31050 $MA_DRIVE_AX_RATIO_DENOM[n] - Load
rev.
-/1 Load
rev.
●
MD31060 $MA_DRIVE_AX_RATIO_NUMERA[n] - Motor
rev. if
infeed
gear
available
-/1 Motor
rev.
●
MD31070 $MA_DRIVE_ENC_RATIO_DENOM[n] - Encoder
rev.
Encoder
rev.
Encoder
rev.
Encoder
rev.
MD31080 $MA_DRIVE_ENC_RATIO_NUMERA[n] - Motor-
side
encoder*
Motor
rev.
Motor
rev.
Load
rev.
- = 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.
◆ For distance-coded measuring systems
● These machine data are not required for encoder matching (path evaluation).
However, they must be entered correctly for the setpoint calculation! Otherwise the
required servo gain factor (K
V
) will not be set. The load revolutions are entered into
machine data MD31050 $MA_DRIVE_AX_RATIO_DENOM and the motor revolutions
in machine data MD31060 $MA_DRIVE_AX_RATIO_NUMERA.
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