YASKAWA CR700, Техническое руководство, Страница: 229 / 886

Startup
Procedure
and
Test
Run
3
3.11 Problems that Can Frequently Occur during Setup and Possible Solutions
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual 229
◆
Motor Rotates in the Opposite Direction from the Run Command
Causes Possible Solutions
Phase wiring between the drive and motor is incorrect. • Check the wiring between the drive and motor.
• Connect drive output terminals U/T1, V/T2, and W/T3 in the right order to match motor
terminals U, V, and W.
• Switch two motor cables (U, V, and W) to reverse motor direction.
The forward direction for the motor is set up incorrectly. • Connect drive output terminals U/T1, V/T2, and W/T3 in the right order to match motor
terminals U, V, and W.
• Switch two motor cables (U, V, and W) to reverse motor direction.
A - Forward direction B - Load Shaft
Figure 3.12 Forward Rotating Motor
Note:
• For Yaskawa motors, forward is designated as being counterclockwise when looking from
the motor shaft.
• Refer to the specifications of the motor being used, and confirm the forward rotation
direction. The forward rotation direction of motors may differ depending on manufacturer
and type.
The signal connections for forward run and reverse run on the drive control
circuit terminals and control panel side are incorrect.
Correctly wire the control circuit.
◆
Motor Rotates in One Direction Only
Causes Possible Solutions
The drive prohibits reverse rotation. Set
b1-04 = 0 [Reverse Operation Selection = Reverse Enabled]
.
◆
Motor Stops When Operating at the Brake Release Frequency Speed
Causes Possible Solutions
Too much motor slip.
The settings of
S1-01 [Brake Release Frequency(FWD)]
and
S1-02 [Break
Release Frequency(REV)] are incorrect.
Increase the setting value of S1-01 and S1-02 .
◆
Response Is Slow at Start
Causes Possible Solutions
The torque compensation setting is not correct while using Open Loop
Vector Control, Closed Loop Vector Control, or Advanced Open Loop
Vector Control.
Set S1-09 ≒ 50 to 80 [Torque Compensation (FWD) ≒ 50% to 80%] .
Brake release settings are not correct while using Open Loop Vector Control,
Closed Loop Vector Control, or Advanced Open Loop Vector Control.
Set S1-07 ≒ 70 to 80 [Brake Release Torque (FWD) ≒ 70% to 80%] .
Brake release settings are not correct while using V/f Control. • Decrease the setting values of S1-01 [Brake Release Frequency(FWD)] and S1-02 [Brake
Release Frequency(REV)] .
• Decrease the setting values of S1-05 [Brake Release Current (FWD)] and S1-06 [Brake
Release Current (REV)] .
◆
Motor Stalls during Acceleration or Accel/Decel Time Is Too Long
Causes Possible Solutions
The value set in
S1-04 [Brake Delay Time]
is too high. Decrease the setting value of
S1-04
.
Torque limit has been reached or current suppression keeps the drive from
accelerating.
• Decrease the load.
• Use a larger motor.
Note:
Although the drive has a Stall Prevention function and a Torque Compensation Limit
function, accelerating too quickly or trying to drive an excessively large load can exceed the
capabilities of the motor.
Torque limit is not set correctly. Set the torque limit correctly.
The acceleration time setting is too short. Increase the value set in C1-01, C1-03, C1-05, or C1-07 [Acceleration Times] .
B
A