Pid Output Fault; Insufficient Motor Torque; Motor Rotates After The Drive Output Is Shut Off; Ov Or Speed Loss Occurs When Starting Into A Rotating Load - YASKAWA V1000 Series Installation & Start-Up Manual

5.9 Troubleshooting without Fault Display

PID output fault

■
Cause
No PID feedback input.
The level of detection and the target
value do not correspond with each other.
Reverse drive output frequency and
speed detection. When output frequency
rises, the sensor detects a speed decrease.

Insufficient Motor Torque

■
Cause
Auto-Tuning has not yet been performed
(required for OLV Control).
The control mode was changed after
performing Auto-Tuning.
Only Line-to-Line Resistance
Auto-Tuning was performed.

Motor Rotates After the Drive Output is Shut Off

■
Cause
Low DC Injection Braking and the drive
cannot decelerate properly.

OV or Speed Loss Occurs When Starting into a Rotating Load

■
Cause
The load is already rotating when the
drive is trying to start it.
238
• Check the multi-function analog input terminal settings.
• Set multi-function analog input terminal A1 or A2 for PID feedback
(H3-02 or H3-10 = "B").
• A signal input to the terminal selection for PID feedback is necessary.
• Check the connection of the feedback signal.
• Check the various PID-related parameter settings.
• No PID feedback input to the terminal causes the value detected to be 0,
causing a PID fault and the drive to operate at max frequency.
• PID control keeps the difference between target and detection values at
0. Set the input level for the values relative to one another.
• Use analog input gains H3-03/11 to adjust PID target and feedback
signal scaling.
Set PID output for reverse characteristics (b5-09 = "1").
Perform Auto-Tuning.
Perform Auto-Tuning again.
Perform Rotational Auto-Tuning.
• Adjust the DC Injection braking settings.
• Increase the value of b2-02 (DC Injection Braking Current).
• Increase the b2-04 (DC Injection Braking Time at Stop).
• Stop the motor using DC Injection braking. Restart the motor.
• Increase the value of b2-03 (DC Injection Braking Time at start).
• Enable Speed Search at start (b3-01 = "1").
• Set a multi-function input terminal for external Speed Search command
(H1-
YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual
Possible Solutions
Possible Solutions
Possible Solutions
Possible Solutions
="61"or "62" during restart). Figure 4.17 on on page 130.