YASKAWA A1000 Technical Manual page 130

5.2 Fault Detection
Cause
There is an error in EEPROM control circuit
The power supply was switched off while
parameters were being saved to the drive
Digital Operator Display
CPF20 or CPF21
or
to CPF26 to CPF34
CPF40 to CPF45
to
Cause
Hardware is damaged
Digital Operator Display
<1>
Cause
An external fault was received from the PLC
with other than F6-03 = 3 "alarm only" (the
drive continued to run after external fault)
Problem with the PLC program
Digital Operator Display
130
• Turn off the power and check the connection between the control board and the drive.
• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
Reinitialize the drive (A1-03).
CPF07
Terminal Board Connection Error
CPF08
Control Circuit Error
CPF22 Hybrid IC Failure
Control Board Connection Error
CPF23
Connection error between the control board and the drive
Drive Unit Signal Fault
CPF24
The drive capacity cannot be detected correctly (drive capacity is checked when the drive is powered up).
Control Circuit Error
CPU error
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
Speed Deviation (for Control Mode with PG)
dEv
The deviation between the speed reference and speed feedback is greater than the setting in F1-10 for
longer than the time set to F1-11.
Z Pulse Fault
dv1
The motor turned one full rotation without the Z Pulse being detected.
Z Pulse Noise Fault Detection
dv2
The Z Pulse is out of phase by more than 5 degrees for the number of times specified in parameter F1-17.
Inversion Detection
dv3
The torque reference and acceleration are in opposite directions and the speed reference and actual motor
speed differ by over 30% for the number of times set to F1-18.
Inversion Prevention Detection
Pulses indicate that the motor is rotating in the opposite direction of the speed reference. Set the number
dv4 of pulses to trigger inverse detection to F1-19.
Note: Set F1-19 to 0 to disable inverse detection in applications where the motor may rotate in the
opposite direction of the speed reference.
dv7 Polarity Judge Timeout
dWAL
DriveWorksEZ Fault
dWFL
SI-T3 Watchdog Timer Error
E5
The watchdog timed out.
Option Card External Fault
EF0
An external fault condition is present.
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
Check the PLC program and correct problems.
External Fault (input terminal S1)
EF1
External fault at multi-function input terminal S1.
External Fault (input terminal S2)
EF2
External fault at multi-function input terminal S2.
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
YASKAWA ELECTRIC TOEP C710616 41B YASKAWA AC Drive - A1000 Quick Start Guide