No-Load Operation Test Run; During Operation - YASKAWA U1000 Series Technical Manual

4.8 No-Load Operation Test Run

4.8 No-Load Operation Test Run
◆ No-Load Operation Test Run
This section explains how to operate the drive with the motor decoupled from the load during a test run.
Before Starting the Motor
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Check the following items before operation:
• Ensure the area around the motor is safe.
• Ensure external emergency stop circuitry is working properly and other safety precautions have been taken.

During Operation

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Check the following items during operation:
• The motor should rotate smoothly (i.e., no abnormal noise or oscillation).
• The motor should accelerate and decelerate smoothly.
No-Load Operation Instructions
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The following example illustrates a test run procedure using the digital operator.
1. Turn on the power to the drive. The initial display appears.
2.
Press the key to select LOCAL. The LO/RE light will turn on.
3. Set the frequency reference to 6 Hz. Refer to
4.
Press to give the drive a Run command. RUN will light and the motor will rotate at 6 Hz.
5. Ensure the motor is rotating in the correct direction and that no faults or alarms occur.
If there is no error in step 4, increase the frequency reference. Refer to
to change the frequency reference. Increase the frequency in increments of 10 Hz, verifying smooth operation
6.
at all speeds. For each frequency, check the drive output current using monitor U1-03. The current should be
well below the motor rated current.
168
Step
Figure 4.6 (page 138) for the setting procedure.
Figure 4.6 (page 138) for the procedure
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YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
Display/Result
- MODE - DRV Rdy
FREF (AI)
U1-01= 0.00Hz
U1-02= 0.00Hz RSEQ
U1-03= 0.00A RREF
FWD
JOG
ALM
DIGITAL OPERATOR JVOP-180
- MODE - DRV Rdy
FREF (OPR)
U1-01= 0.00Hz
U1-02= 0.00Hz LSEQ
U1-03= 0.00A LREF
JOG FWD FWD/REV
F1 F2
LO
ESC
RE
RESET ENTER
RUN STOP
Off On
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ALM
DIGITAL OPERATOR JVOP-180
- MODE - DRV Rdy
FREF (OPR)
U1-01= 6.00Hz
U1-02= 0.00Hz
LSEQ
U1-03= 0.00A LREF
JOG FWD FWD/REV
F1 F2
LO
ESC
RE
RESET ENTER
RUN STOP
RUN RUN
Off On
Motor
Forward
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