YASKAWA AC Drive-A1000 User Manual

6.4 Fault Detection
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Fault Displays, Causes, and Possible Solutions
Faults are detected for drive protection, and cause the drive to stop while triggering the fault output terminal MA-MB-MC.
Remove the cause of the fault and manually clear the fault before attempting to run the drive again.
Table 6.14 Detailed Fault Displays, Causes, and Possible Solutions
Digital Operator Display Fault Name
boL
Braking Transistor Overload Fault
The braking transistor reached its overload level.
Cause Possible Solution
The wrong braking resistor is installed Select the correct braking resistor.
Digital Operator Display Fault Name
bUS
Option Communication Error
• The connection was lost after establishing initial communication.
• Only detected when the run command frequency reference is assigned to an option card.
Cause Possible Solution
No signal was received from the PLC • Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits and repair as needed.
Faulty communications wiring or an existing
short circuit
Communication data error occurred due to
noise
• Check the various options available to minimize the effects of noise.
• 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 the
drive input power side.
• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drive
power supply input.
The option card is damaged Replace the option card if there are no problems with the wiring and the error continues to occur.
The option card is not properly connected to
the drive
• The connector pins on the option card do not line up properly with the connector pins on the drive.
• Reinstall the option card.
Digital Operator Display Fault Name
CE
MEMOBUS/Modbus Communication Error
Control data was not received for the CE detection time set to H5-09.
Cause Possible Solution
Faulty communications wiring or an existing
short circuit
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits and repair as needed.
Communication data error occurred due to
noise
• Check the various options available to minimize the effects of noise.
• 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 the
drive input power side.
• Ensure that other equipment such as switches or relays do not cause noise. Use surge suppressors if
required.
• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drive
power supply input.
Digital Operator Display Fault Name
CF
Control Fault
The torque limit was reached continuously for three seconds or longer while ramping to stop in OLV
Control.
Cause Possible Solution
Motor parameters are improperly set 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).
6.4 Fault Detection
300
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual

YASKAWA AC Drive-A1000 Specifications

General

Brand	YASKAWA
Model	AC Drive-A1000
Category	Controller
Language	English