The Starting Torque Is Not Sufficient; Motor Does Not Restart After Power Loss - YASKAWA CR700 Technical Manual

3.11 Problems that Can Frequently Occur during Setup and Possible Solutions
Causes
Auto-Tuning has just completed.
The fast stop command has been entered.
Settings are incorrect for the source that provides the Run command.
The frequency reference source is not set correctly.
There is defective wiring in the control circuit terminals.
The settings for voltage input and current input of the master frequency
reference are incorrect.
Selection for the sinking/sourcing mode and the internal/external power
supply is incorrect.
The frequency reference is too low.
The MFAI setting is incorrect.
was pushed.

The Starting Torque Is Not Sufficient

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Causes
Auto-Tuning has not been done in vector control method.
The control method was changed after doing Auto-Tuning.
Stationary Auto-Tuning for Line-to-Line Resistance was done.

Motor Does Not Restart after Power Loss

◆
Causes
The Run command was not issued again when power was restored.
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Possible Solutions
Switch the keypad to the Home screen.
Note:
When Auto-Tuning completes, the drive is switched back to the Programming Mode. The
Run command will not be accepted unless the drive is in the Drive Mode.
Turn off the fast stop input signal.
Set b1-02 [Run Command Selection 1] correctly.
Set b1-01 [Frequency Reference Selection 1] correctly.
• Correctly wire the drive control circuit terminals.
• Check the input terminal status using U1-10 [Input Terminal Status].
Check the analog input terminal signal level settings.
• Terminal A2: DIP switch S1 and H3-09 [Terminal A2 Signal Level Select]
• For sinking mode, short circuit terminals SC-SP using a wire jumper.
• For sourcing mode, short circuit terminals SC-SN using a wire jumper.
• In the case of an external power supply, remove the wire jumper.
• Check U1-01 [Frequency Reference].
• Make the frequency reference higher than E1-09 [Minimum Output Frequency].
• Check if the functions set to the analog input terminals being used are correct. When H3-02,
H3-10, H3-06 = 1 [MFAI Function Selection = Frequency Gain] has been set and voltage
(current) is not input, the frequency reference will be 0.
• Check if the analog input values set to terminals A1, A2, and A3 are appropriate using U1-13
to U1-15 [Terminal A1, A2, A3 Level].
Turn off the Run command from external input, and then turn it on again.
Note:
during operation, the drive will ramp to stop. When you set o2-02 =
When you push
0 [STOP Key Function Selection = Disabled], the
Possible Solutions
Do Auto-Tuning.
Do Auto-Tuning again.
Do Rotational Auto-Tuning.
Possible Solutions
Check the sequence and wiring that has been set up to enter the Run command.
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
function can be disabled.