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Velocities, Setpoint/Actual Value Systems, Closed-Loop Control (G2)
7.3 Setpoint/actual-value system
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
129
If settings beyond the limit are made, the value in MD36210 is used as the limiter, an alarm
is output and the axes brought to a halt. See Chapter "Axis monitoring functions" for more
details.
With an analog spindle the maximum speed that can be output is limited by the maximum
setpoint output voltage of 10 V. The value in MD36210 CTRLOUT_LIMIT should not be
greater than the speed value that is reached at this voltage (100%).
Note
For special considerations for controlling a spindle, see Chapter "Spindles (S1)".
7.3.5
Actual-value processing
Actual-value resolution
In order to be able to create a correctly closed position closed-loop control, the control
system must be informed of the valid actual-value resolution.
Depending on the type of axis (linear axis, rotary axis/spindle, analog spindle) and the type
of actual-value resolution (direct, indirect), the following machine data must be
parameterized to calculate the actual-value acquisition for the main applications:
Linear axis
Rotary axis
Spindle
Machine data
Encoder on
motor
Encoder on
motor
Encoder on
motor
Encoder on
machine
Without
measuring
system
MD30200 NUM_ENCS
(number of encoders)
1
1
1
1
0
MD30300 IS_ROT_AX
(rotary axis)
0
1
1
1
1
MD31040 ENC_IS_DIRECT[0]
(encoder is connected directly at the
machine)
0
0
0
1
1
MD31020 ENC_RESOL[0]
(encoder pulses per revolution)
Pulses/rev
Pulses/rev
Pulses/rev
Pulses/rev
-
MD31030 LEADSCREW_PITCH
(leadscrew pitch)
mm/rev.
-
-
-
-
MD31080
DRIVE_ENC_RATIO_NUMERA[n]
(measuring gearbox numerator)
1
1
1
load revs
-
MD31070
DRIVE_ENC_RATIO_DENOM[n]
(measuring gearbox denominator)
1
1
1
encoder revs
-
MD31060
DRIVE_AX_RATIO_NUMERA[n]
(load gearbox numerator)
motor revs
motor revs
motor revs
See
note *)
-