The Correct Auto-Tuning Mode Is Not Available; The Motor Stalls During Acceleration Or Accel/Decel Time Is Too Long - YASKAWA CIPR-GA50C series Technical Manual

Causes
The air around the motor is too hot.
The motor fan stopped or is clogged.
◆

The Correct Auto-Tuning Mode Is Not Available

Causes
The desired Auto-Tuning mode is not available for the selected control
mode.
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The Motor Stalls during Acceleration or Accel/Decel Time Is Too Long

Causes
The drive and motor system are at the torque limit or current suppression
will not let the drive accelerate.
Torque limit is set incorrectly.
The acceleration time setting is too short.
The load is too large.
The frequency reference is low.
The frequency reference is set incorrectly.
The motor characteristics and drive parameter settings are not compatible.
The drive is operating in vector control mode, but you did not complete
Auto-Tuning.
The Stall Prevention level during acceleration setting is too low.
The Stall Prevention level during run setting is too low.
The drive is at the limit of the V/f motor control method.
YASKAWA SIEPC71061753A GA500 Technical Manual
7.10 Troubleshooting Without Fault Display
Possible Solutions
• Measure the ambient temperature.
• Decrease the temperature in the area until it is in the specified temperature range.
• Clean the motor fan.
• Make the drive environment better.
Possible Solutions
Change the motor control method with parameter A1-02 [Control Method Selection].
Possible Solutions
• Decrease the load.
• Use a larger motor.
Note:
Although the drive has a Stall Prevention function and a Torque Compensation Limit
function, if you try to accelerate too fast or try to drive a load that is too large, it can be too
much for the limits of the motor.
Set the torque limit correctly.
Examine the values set in C1-01, C1-03, C1-05, or C1-07 [Acceleration Time] and set them to
applicable values.
• Increase the acceleration time.
• Examine the mechanical brake and make sure that it is fully releasing.
• Decrease the load to make sure that the output current stays less than the motor rated current.
• Use a larger motor.
Note:
• In extruder and mixer applications, the load can increase as the temperature decreases.
• Although the drive has a Stall Prevention function and a Torque Compensation Limit
function, if you try to accelerate too fast or try to drive a load that is too large, it can be too
much for the limits of the motor.
• Examine E1-04 [Maximum Output Frequency] and increase the setting if it is set too low.
• Examine U1-01 [Frequency Reference] for the correct frequency reference.
• Examine the multi-function input terminals to see if a frequency reference signal switch is set.
• When you use an MFAI, examine the low gain level set in H3-03, H3-11 [Terminal A1, A2
Gain Setting].
When H3-10 = 1 Terminal A2 Function Selection = Frequency Gain], see if the drive is set for
voltage (current).
• Examine the value set in H3-10.
• Use U1-14 [Terminal A2 Input Voltage] to make sure that the analog input value set to
terminal A2 is applicable.
• Set the correct V/f pattern to agree with the characteristics of the motor.
• Examine the V/f pattern set in E1-03 [V/f Pattern Selection].
• Do Rotational Auto-Tuning.
• Do Auto-Tuning.
• Calculate motor data and reset motor parameters.
• Set A1-02 = 0 [Control Method Selection = V/f Control].
Increase the value set in L3-02 [Stall Prevent Level during Accel].
Note:
If the L3-02 value is too low, the acceleration time can be unsatisfactorily long.
Increase the value set in L3-06 [Stall Prevent Level during Run].
Note:
If the L3-06 value is too low, speed will decrease before the drive outputs torque.
• When the motor cable is longer than 50 m (164 ft), do Auto-Tuning for line-to-line resistance.
• Set the V/f pattern to "High Starting Torque".
• Use a Vector Control method.
Note:
V/f control method does not supply high torque at low speeds.
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