Fault Detection; Fault Detection; Fault Displays, Causes, And Possible Solutions - YASKAWA T1000A Technical Manual

6.4

Fault Detection

u Fault Displays, Causes, and Possible Solutions
Faults are detected for drive protection, and cause the drive to stop. When a fault occurs, the fault output terminal MA-
MB-MC is triggered. Faults have to be cleared manually after removing the cause to start running the drive again.
Table 6.14 Detailed Fault Displays, Causes, and Possible Solutions
Digital Operator Display
Cause
The wrong braking resistor is installed.
Digital Operator Display
Cause
No signal received from the PLC.
Faulty communications wiring 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.
Digital Operator Display
Cause
Faulty communications wiring or a short circuit exists.
Communication data error occurred due to noise.
Digital Operator Display
Cause
Motor parameters are not set properly.
Torque limit is too low.
Load inertia is too big.
Digital Operator Display
or
CPF00 or CPF01
<1>
Cause
There is a self diagnostic error in control circuit.
Connector on the operator is damaged.
Digital Operator Display
Cause
Control circuit is damaged.
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
Braking Transistor Overload Fault
boL
The braking transistor has reached its overload level.
Select the optimal braking resistor.
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 disconnected cables and short circuits. Repair as needed.
• Check the various options available to minimize the effects of noise.
• Take steps to counteract noise in the control circuit, main circuit, and ground wiring.
• Ensure that other equipment such as switches or relays do not cause noise. Use surge suppressors if necessary.
• Use only recommended cables or other shielded line. Ground the shield on the controller side or on the drive input power side.
• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drive power supply input.
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 disconnected cables and short circuits. Repair as needed.
• Check the various options available to minimize the effects of noise.
• Take steps to counteract noise in the control circuit, main circuit, and ground wiring.
• Use only recommended cables or other 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 communication wiring from drive power lines. Install an EMC noise filter to the drive power supply input.
Control Fault
CF
A torque limit was reached continuously for three seconds or longer while ramping to stop 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.
Control Circuit Error
• Cycle power to the drive.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
• Replace the operator.
A/D Conversion Error
CPF02
An A/D conversion error or control circuit error occurred.
• Cycle power to the drive.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.

6.4 Fault Detection

Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
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