Nidec Control Techniques Digitax-SF Series User Manual

13
8
Troubleshooting
8. Troubleshooting
Digitax SF Instruction Manual
3. Alarms and Remedies
3. Alarms and Remedies
Alarm No.
14 Overvoltage
Symptom
and
Possible Cause
The power supply to the control components has exceeded the drive circuit limits.
Remedy
If the alarm occurs only during deceleration
By using the Setup Panel or Digitax SF Connect, check the regeneration status, which
tells you if a braking resistor is necessary. If necessary, install a braking resistor.
Check the motion patterns of commands.
Use a command filter and gradually decrease the speed.
If the alarm occurs regardless of deceleration
Verify that the AC Supply is within specification. Check for voltage
changes while the whole system is operating.
Reset Method
Alarm No.
15
Power supply (AC Supply)
Symptom
and
Possible Cause
The AC Supply voltage is abnormally high or low.
The AC Supply was not present.
The AC Supply was not within the input range.
The power supply fluctuated and exceeded the rated range.
SVON signal was input without AC supply being present.
Anomaly of the regenerative control circuit operating time lasted longer than a specic
amount of time.
Regeneration ON status too long
Remedy
If the alarm occurred between servo on and operation startup
Verify that the AC Supply is connected to the drive. Check
the AC supply.
Check the timing of AC Supply input and SVON signal input.
If the alarm occurred during motor operation
Check for no voltage uctuations due to the whole system operation.
Provide enough power supply so that the system experiences no voltage uctuations.
If the alarm occurs during deceleration
Check the regenerative voltage warning signal on the Setup Panel or Digitax
SF Connect. If a regenerative voltage warning occurs, install a braking
resistor. Check the motion patterns directed by commands.
Gradually decrease speeds by using a command smoothing lter.
Reset Method
RESET Signal
① Eliminate the cause.
② input RESET signal to the RESET terminal
on the connector CN1.
Control-power cycle
① Eliminate the cause.
② Cycle control-power.
CLEAR Encoder
① Eliminate the cause.
② Execute CLEAR Encoder
③ Cycle control-power.
After power cycle, perform Homing.

Nidec Control Techniques Digitax-SF Series Specifications

General

Brand	Nidec
Model	Control Techniques Digitax-SF Series
Category	Servo Drives
Language	English