Fault Detection; Fault Detection; Fault Displays, Causes, And Possible Solutions - YASKAWA V1000 Series Technical Manual

6.4

Fault Detection

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Fault Displays, Causes, and Possible Solutions

LED Operator Display
Cause
No signal received from the PLC.
The communication cable is faulty or a short circuit exists.
A communications data error occurred due to noise.
The option card is damaged.
The option card is not properly connected to the drive.
LED Operator Display
Cause
Faulty communications wiring, or a short circuit exists.
A communications data error occurred due to noise.
LED Operator Display
Cause
Motor parameters are not set properly.
Torque limit is too low.
Load inertia is too big.
LED Operator Display
Cause
While the drive automatically adjusted the current offset, the
calculated value exceeded the allowable setting range. This
problem may occur when attempting to restart a coasting PM
motor.
The drive attempted to write parameter values when the
drive input power was shut off (use communications option
card).
LED Operator Display
Cause
Control circuit is damaged.
Control circuit terminals have shorted out (+V, AC).
Control terminal input current has exceeded allowable
levels.
LED Operator Display
Cause
Drive hardware is damaged.
LED Operator Display
Cause
Control circuit is damaged.
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
Table 6.8 Detailed Fault Displays, Causes, and Possible Solutions
Option Communication Error
bUS
• After establishing initial communication, the connection was lost.
• Only detected when the run command frequency reference is assigned to an option card.
• Check for faulty wiring.
• Correct the wiring.
• Check for loose wiring and short circuits. Repair as needed.
• Check the various options available to minimize the effects of noise.
• Counteract noise in control circuit, main circuit, and ground wiring.
• Ensure that other equipment such as switches or relays do not cause noise and use surge suppressors if required.
• Use cables recommended by Yaskawa or another type of shielded line. Ground the shield on the controller side or on the drive input
power side.
• Separate all wiring for communications devices from drive input power lines. Install a noise filter to the input side of the drive input
power.
• Replace the option card if there are no problems with the wiring and the error continues to occur.
• The connector pins on the option card are not properly lined up with the connector pins on the drive.
• Reinstall the option card.
MEMOBUS/Modbus Communication Error
CE
Control data was not received for the CE detection time set to H5-09.
• Check for faulty wiring.
• Correct the wiring.
• Check for loose wiring and short circuits. Repair as needed.
• 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 a noise filter to the input side of the drive input
power.
Control Fault
CF
A torque limit was reached continuously for three seconds or longer during a ramp to stop while in Open Loop Vector Control.
Check the motor parameter settings and repeat Auto-Tuning.
Set the torque limit to the most appropriate setting (L7-01 through L7-04).
• 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.
Current Offset Fault
CoF
There is a problem with the current detection circuit or the drive attempted to start a coasting PM motor.
Enable Speed Search at start (b3-01 = 1). Use the multi-function terminals to execute External Speed Search 1 and 2 (H1-oo = 61 or
62).
Note: When using a PM motor, both External Speed Search 1 and 2 perform the same operation.
Reinitialize the drive (A1-03).
A/D Conversion Error
CPF02
An A/D conversion error occurred.
Cycle power to the drive.If the problem continues, replace the drive.
• Check for wiring errors along the control circuit terminals.
• Correct the wiring.
Check the resistance of the speed potentiometer and related wiring.
• Check the input current.
• Reduce the current input to control circuit terminal (+V) to 20 mA.
PWM Data Error
CPF03
There is a problem with the PWM data.
Replace the drive.
EEPROM Data Error
CPF06
There is an error in the data saved to EEPROM.
Cycle power to the drive.If the problem continues, replace the drive.
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6.4 Fault Detection

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