64
Digitax ST User Guide
Issue: 5
7.2 Quick Start set-up
For simplicity only an incremental quadrature encoder will be considered here. For information on setting up one of the other supported speed
feedback devices, refer to section 7.3
Action
Detail
Before power-
up
Ensure:
•
Drive Enable signal is not given (terminal 31)
•
Run signal is not given
•
Motor is connected
•
Feedback device is connected
Power-up the
drive
If a motor thermistor is not connected and the drive trips on ‘th’ set Pr
0.21
= VOLt and press the red reset button.
Ensure:
•
SMARTCARD is installed (first power-up only)
•
Drive displays ‘inh’
If the drive trips, see Chapter 14
* If no internal braking resistor is installed, then the drive will trip ‘br.th’. If no internal braking resistor is required, then
set Pr
0.51
to 8 to disable the trip.
Set motor
feedback
parameters
Incremental encoder basic set-up
Enter:
•
Drive encoder type in Pr.
3.38
= Ab.SErVO (3): Quadrature encoder with commutation outputs
•
Encoder power supply in Pr.
3.36
= 5 V (0), 8 V (1) or 15 V (2).
If Ab encoder voltage is greater than 5 V, then the termination resistors must be disabled Pr
3.39
to 0.
•
Drive encoder Pulses Per Revolution in Pr.
3.34
(set according to encoder)
•
Drive encoder termination resistor setting in Pr.
3.39
:
0
= A-A\, B-B\, Z-Z\ termination resistors disabled
1
= A-A\, B-B\, termination resistors enabled, Z-Z\ termination resistors disabled
2
= A-A\, B-B\, Z-Z\ termination resistors enabled
Enter motor
nameplate
details
Enter:
•
Motor rated current in Pr
0.46
(A)
Ensure that this equal to or less than the Heavy Duty rating of the drive otherwise It.AC trips may occur during
the autotune.
•
Number of poles in Pr
0.42
Set maximum
speed
Enter:
•
Maximum speed in Pr
0.02
(rpm)
Set
acceleration /
deceleration
rates
Enter:
•
Acceleration rate in Pr
0.03
(s/1000 rpm)
•
Deceleration rate in Pr
0.04
(s/1000 rpm) (If braking resistor installed, set Pr
0.15
= FAST. Also ensure Pr
10.30
and Pr
10.31
are set correctly, otherwise premature ‘It.br’ trips may be seen.)
Autotune
Digitax ST is able to perform a short low speed, a normal low speed or a minimal movement autotune. The motor
must be at a standstill before an autotune is enabled. A normal low speed autotune will measure the encoder phase
offset angle and calculate the current gains.
The motor must not be loaded when attempting an autotune.
•
The short low speed and normal low speed tests will rotate the motor by up to 2 rotations in the direction selected
and the drive measures the encoder phase angle and updates the value in Pr
3.25
. The normal low speed test also
measures the stator resistance, and inductance of the motor. These are used to calculate the current loop gains,
and at the end of the test the values in Pr
0.38
and Pr
0.39
are updated. The short low speed test takes
approximately 2 s and the normal low speed test approximately 20 s to complete.
•
The minimal movement autotune will move the motor through an angle defined by Pr
5.38
. The motor must not
be loaded for this test although it will operate correctly when the load is an inertia.
To perform an autotune:
•
Set Pr
0.40
= 1 for a short low speed autotune, Pr
0.40
= 2 for a normal low speed test or Pr
0.40
= 5 for a
minimal movement autotune.
•
Close the run signal (terminal 26 or 27).
•
Close the Drive Enable signal (terminal 31). The lower display will flash 'Auto' and 'tunE' alternatively, while the
drive is performing the test.
•
Wait for the drive to display 'rdy' or ‘inh’ and for the motor to come to a standstill.
If the drive trips it cannot be reset until the drive enable signal (terminal 31) has been removed. See Chapter
14
Remove the drive enabled and run signal from the drive.
Save
parameters
Enter 1000 in Pr
xx.00
Press the red
reset button or toggle the reset digital input (ensure Pr
xx.00
returns to 0)
Run
Drive is now ready to run
NOTE
Setting the encoder voltage supply too high for the encoder could result in damage to the feedback device.
CAUTION
Model No: 95UXXXXXXXXXXXX
Volts: 380/480
Cont: 7.7Nm:4.81Arms
Stall: 9.5Nm:5.91Arms
Speed: 3000rpm Poles:6
Kt: 1.6Nm/Arms
Ins Class: H
Brake: 12Nm
24V
0.67A
Serial No: XXXXXXXXXXX
Control Techniques
Dynamics Ltd
ANDOVER, HANTS.
ENGLAND. SP10 5AB
0.02
t
1000rpm
0.03
t
0.04
The short low speed and normal low speed tests will rotate the motor by up to 2 revolutions in the direction
selected, regardless of the reference provided. The minimal movement test will move the motor through an
angle defined by Pr
5.38
.
Once complete the motor will come to a standstill. The enable signal must be removed before the drive can
be made to run at the required reference.
The drive can be stopped at any time by removing the run signal or removing the Drive Enable.
WARNING
0
0
Summary of Contents for Digitax ST
Page 1: ...User Guide AC variable speed drive for servo motors Part Number 0475 0001 05 Issue 5 ...
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