Problems That Can Frequently Occur During Setup And Possible Solutions - YASKAWA CIPR-CR70A Series Technical Manual

Related Parameters
No.
S2-18 Rapid Deceleration Selection
S2-19 Rapid Deceleration Time
◆

Problems That Can Frequently Occur during Setup and Possible Solutions

If the drive or motor operates abusually but a fault code or error code is not displayed on the keypad, refer to this
section and take appropriate measures.
• Motor hunting and oscillation
• Poor motor torque
• Poor speed precision
• Poor motor torque and speed response
• Motor noise
Note:
The method for making adjustments is different when synchronizing 2 drives, and when using a single drive that switches between
multiple motors. For such operations, consult with Yaskawa about drive settings and drive adjustments.
Type
Keypad Operation
Motor Does Not Operate Correctly
Suspension Drops or Load Slips
YASKAWA ELECTRIC SIEP C710617 19A YASKAWA AC Drive CR700 Technical Manual
Name
Enables and disables rapid deceleration.
When rapid deceleration is enabled, and a Run command in reverse to the
current direction of motor rotation is input during the ramp to stop process,
the motor rapidly decelerates per the time set to S2-19 [Rapid Deceleration
Time].
0: Disabled
1: Enabled
Sets the rapid deceleration time.
Table 3.27 List of Problems
Cannot Change Parameter Settings
The Correct Auto-Tuning Mode Is Not Available
Crane Sequence Does Not Operate
Motor Does Not Rotate After Entering Run Command
Insufficient Starting Torque
Motor Does Not Restart after Power Loss
Motor Rotates in the Opposite Direction from the Run Command
Motor Rotates in One Direction Only
Motor Stops When Operating at the Brake Release Frequency Speed
Response Is Slow at Start
Motor Stalls during Acceleration or Accel/Decel Time Is Too Long
Output Frequency Is Not As High As Frequency Reference
Drive Frequency Reference Differs from the Controller Frequency Reference
Command
Large Inconsistency in Stopping Position Due to the Load Rate
Deceleration Takes Longer Than Expected with Dynamic Braking Enabled
Motor Rotates after the Drive Output is Shut Off
Suspension Drops (Falls)
Load Slips at Start
Load Slips at Stop
Slipping Occurs During Extremely Fast Inching
Load Falls When Brake Is Applied
3 Startup Procedure and Test Run
Adjustment Method
Problem Ref.
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