YASKAWA A1000 Series Technical Manual

6.4 Fault Detection
308 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Digital Operator Display Fault Name
dEv
Speed Deviation (for Control Mode with PG)
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.
Cause Possible Solution
Load is too heavy. Reduce the load.
Acceleration and deceleration times are set too short. Increase the acceleration and deceleration times (C1-01 through C1-08).
The load is locked up. Check the machine.
Parameters are not set appropriately. Check the settings of parameters F1-10 and F1-11.
Incorrect speed feedback scaling if terminal RP is used
as speed feedback input in V/f control.
• Set H6-02 to the same value as the speed feedback signal frequency when the motor runs at maximum speed.
• Adjust the speed feedback signal using parameters H6-03 through H6-05.
• Make sure the speed feedback signal frequency does not exceed the maximum input frequency of terminal RP.
Motor brake engaged. Ensure the motor brake releases properly.
Digital Operator Display Fault Name
dv1
Z Pulse Fault
The motor turned one full rotation without the Z pulse being detected.
Cause Possible Solution
PG encoder is not connected, not wired properly, or is
damaged.
• Make sure the PG encoder is properly connected and all shielded lines are properly grounded.
• If the problem continues after cycling power, then replace either the PG option card or the PG encoder itself.
Digital Operator Display Fault Name
dv2
Z Pulse Noise Fault Detection
The Z pulse is out of phase by more than 5 degrees for the number of times specified in parameter F1-17.
Cause Possible Solution
Noise interference along the PG cable. Separate the PG cable lines from the source of the noise (very possibly drive output wiring).
PG cable is not wired properly. Rewire the PG encoder and make sure all shielded lines are properly grounded.
PG option card or the PG encoder is damaged. If the problem continues after cycling power, then replace either the PG option card or the PG encoder itself.
Digital Operator Display Fault Name
dv3
Inversion Detection
The torque reference and acceleration are in opposite directions from one another (one is in reverse and the other is forward)
while at the same time the speed reference and actual motor speed differ by over 30% for the number of pulses set to F1-18.
Cause Possible Solution
The Z pulse offset is not set properly to E5-11.
Set the value for Δθ to E5-11 as specified on the motor nameplate. Replacing the PG encoder or changing the application so that
the motor rotates in reverse instead requires readjustment of the Z pulse offset.
An external force on the load side has caused the motor
to move.
• Make sure the motor is rotating in the right direction.
• Look for any problems on the load side that might be causing the motor to rotate in the opposite direction.
Noise interference along the PG cable affecting the A or
B pulse.
Rewire the PG encoder and make sure all lines including shielded line are properly connected.
PG encoder is disconnected, not wired properly, or the
PG option card or PG itself is damaged.
Rotational direction for the PG encoder set to F1-05 is
the opposite of the order of the motor lines.
Make sure motor lines for each phase (U, V, W) are connected properly.
Digital Operator Display Fault Name
dv4
Inversion Prevention Detection
Pulses indicate that the motor is rotating in the opposite direction of the speed reference. Set the number of pulses to trigger
inverse detection to F1-19.
Note: Disable inverse detection in applications where the motor may rotate in the opposite direction of the speed reference.
Setting F1-19 to 0 disables this feature.
Cause Possible Solution
The Z pulse offset is not set properly to E5-11.
• Set the value for Δθ to E5-11 as specified on the motor nameplate.
• If the problem continues after cycling power, then replace either the PG option card or the PG encoder itself. Replacing the PG
encoder or changing the application so that the motor rotates in reverse instead requires readjustment of the Z-pulse offset.
Noise interference along the PG cable affecting the A or
B pulse.
• Make sure the motor is rotating in the correct direction.
• Look for any problems on the load side that might be causing the motor to rotate in the opposite direction.
PG encoder is disconnected, not wired properly, or the
PG option card or PG itself is damaged.
• Rewire the PG encoder and make sure all lines including shielded line are properly connected.
• If the problem continues after cycling power, then replace either the PG option card or the PG encoder itself.
Digital Operator Display Fault Name
dWAL
DriveWorksEZ Fault
dWFL
Cause Possible Solution
Fault output by DriveWorksEZ • Correct whatever caused the fault.
Digital Operator Display Fault Name
E5
SI-T3 Watchdog Timer Error
The watchdog has timed out.
Cause Possible Solution
Data has not been received from the PLC, triggering the
watchdog timer.
⇒ Execute DISCONNECT or ALM_CLR, then issue a CONNECT command or SYNC_SET command and proceed to phase 3.

YASKAWA A1000 Series Specifications

General

Series	A1000
Type	AC Drive
Altitude	Up to 1000m without derating
Output Frequency	0-400 Hz
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Communication Options	Modbus, DeviceNet, Profibus, Ethernet/IP
Ambient Temperature	-10 to 50°C
Storage Temperature	-20 to 60°C
Humidity	5% to 95% (non-condensing)
Enclosure Rating	IP20
Horsepower	0.5 to 1000 HP
Power Range	0.4 - 630 kW (varies by voltage and model)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Cooling Method	Fan Cooled
Safety	Safe Torque Off (STO)