Yaskawa J1000 Compact Vector Control Drive - Manual (Page 132)

Digital Operator Display Fault Name
A communications data error
occurred due to noise.
• Check the various options available to minimize the effects of noise.
• Counteract noise in control circuit, main circuit, and ground wiring.
• Use Yaskawa-recommended cables, or another type of shielded line. Ground
the shield on the controller side or on the drive input power side.
• Ensure that other equipment such as switches or relays do not cause noise and
use surge suppressors if required.
• Separate all wiring for communications devices from drive input power lines.
Install an EMC noise filter to the input side of the drive input power.
Digital Operator Display Fault Name
CF
Control Fault
A torque limit was reached continuously for three seconds or longer during a ramp
to stop while in Open Loop Vector Control.
Cause Possible Solution
Motor parameters are not set
properly.
Check the motor parameter settings and repeat Auto-Tuning.
Torque limit is too low. Set the torque limit to the most appropriate setting (L7-01 through L7-04).
Load inertia is too big.
• Adjust the deceleration time (C1-02, -04, -06, -08).
• Set the frequency to the minimum value and interrupt the run command when
the drive finishes decelerating.
Digital Operator Display Fault Name
CoF
Current Offset Fault
The current sensor is damaged or there was residual induction current in the motor
(e.g., during sudden deceleration or when coasting) when the drive attempted to
start the motor.
Cause Possible Solution
Due to residual induction current in
the motor when the drive attempted
to start the motor, the drive
attempted to adjust the current
offset value beyond the allowable
range.
• Create a motor restart sequence that allows enough time for the residual
induction voltage to dissipate.
• Enable Speed Search at start (b3-01 = 1). Use the multi-function terminals to
execute External Speed Search 1 and 2 (H1- = 61 or 62).
Note: When using a PM motor, both External Speed Search 1 and 2 perform the
same operation.
Digital Operator Display Fault Name
CPF02
A/D Conversion Error
An A/D conversion error occurred.
Cause Possible Solution
Control circuit is damaged. Cycle power to the drive. If the problem continues, replace the drive.
5.2 Fault Detection
132 YASKAWA ELECTRIC TOEP C710606 47C YASKAWA AC Drive – V1000 Quick Start Guide