Eurotherm Drives 590 DRV Digital, Руководство по эксплуатации продукта

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4
Chapter 4 Start-up and Adjustment
590 DRV Digital drive Product Manual
AUTOTUNE Procedure
WARNING!
Make sure it is safe to power and turn the motor and that operation of the motor and the drive will not
pose a danger to personnel or equipment.
1. Stop the drive (remove the START/RUN signal) then disconnect the main supply power.
2. The motor shaft may need to be clamped to prevent rotation during the AUTOTUNE procedure. If you
are using a permanent magnet motor, it must be clamped.
3. Turn on the main supply power. Make sure the PROGRAM STOP and COAST STOP LEDs are on
(+24 VDC at terminals B8 and B9).
4. Disable the drive by re24 VDC from terminal C5 (ENABLE). This can also be done with the
MMI under SETUP PARAMETERS:: AUX I/O.
5. Set SETUP PARAMETERS:: CURRENT LOOP:: CURRENT LIMIT to 100%, the MMI default
setting.
6. Start the drive, then enable AUTOTUNE by setting SETUP PARAMETERS:: CURRENT LOOP::
AUTOTUNE to ON. The drive should start but should not generate motor current.
7. Enable the armature current. At this point, the drive performs the AUTOTUNE function automatically,
setting the following parameters:
a. SETUP PARAMETERS:: CURRENT LOOP:: PROP. GAIN
b. SETUP PARAMETERS:: CURRENT LOOP:: INT. GAIN
c. SETUP PARAMETERS:: CURRENT LOOP:: DISCONTINUOUS
These parameters give optimum performance of the current loop and should not be adjusted outside the
AUTOTUNE algorithm.
8. Once AUTOTUNE is finished, the main contactor should open automatically, signaling the end of the
procedure. The controller returns to a safe, stopped condition with the HEALTH, RUN and START
CONTACTOR LED's turned off. If the motor rotates during the procedure, AUTOTUNE ceases automati-
cally causing an AUTOTUNE FAILURE alarm. Removing the RUN or ENABLE signals during
AUTOTUNE also aborts this procedure (in both cases, the armature current is disabled and the main
contactor opens).
9. Remove the clamp, if fitted, from the motor.
10.SAVE PARAMETERS when finished.
Armature Current Waveform Check
Because there is no field voltage, the drive conducts full load current
through the armature during an AUTOTUNE. You can monitor the
armature current waveform with an oscilloscope to verify correct
operation of the controller. Attach the oscilloscope leads to the Armature
Current test point and the Sig. Ground test point. Refer to Figure 5.21 in
Chapter 5 for the drive's test point locations. At full rated current, the
armature current signal should average 5.0 volts. There should be six
current pulses per mains cycle at all times. The pulses should be
uniformly shaped and evenly spaced (see Figure 5.1), each with a width
of 2.8 mS on 60 Hertz supplies, and 3.3 mS on 50 Hertz supplies.
Disconnect Main
Power
Clamp Shaft if PM
Motor
Apply Power
Stop Drive
Disable Drive
Set Main Current
Limit to 100%
Start Drive
Enable Drive
Enable AUTO-
TUNE
Remove
Mechanical
Clamp
Save Parameters
Figure 4.1 - Armature Current
Waveform