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Menu 10
Unidrive SP Advanced User Guide 165
Issue Number: 7 www.controltechniques.com
Enc3 Drive encoder trip: UVW phase offset incorrect whilst running
191
Check the encoder signal for noise
Check encoder shielding
Check the integrity of the encoder mechanical mounting
Repeat the offset measurement test
Enc4 Drive encoder trip: Feedback device comms failure
192
Ensure encoder power supply is correct
Ensure baud rate is correct
Check encoder wiring
Replace feedback device
Enc5 Drive encoder trip: Checksum or CRC error
193
Check the encoder signal for noise
Check the encoder cable shielding
With EnDat encoders, check the comms resolution and/or carry out the auto-configuration Pr 3.41
Enc6 Drive encoder trip: Encoder has indicated an error
194
Replace feedback device
With SSI encoders, check the wiring and encoder supply setting
Enc7 Drive encoder trip: Initialisation failed
195
Re-set the drive
Check the correct encoder type is entered into Pr 3.38
Check encoder wiring
Check encoder power supply is set correctly
Carry out the auto-configuration Pr 3.41
Replace feedback device
Enc8 Drive encoder trip: Auto configuration on power up has been requested and failed
196
Change the setting of Pr 3.41 to 0 and manually enter the drive encoder turns (Pr 3.33) and the equivalent number of lines per
revolution (Pr 3.34)
Check the comms resolution
Enc9
Drive encoder trip: Position feedback selected is selected from a Solutions Module slot which does not have a speed /
position feedback Solutions Module fitted
197 Check setting of Pr 3.26 (or Pr 21.21 if the second motor parameters have been enabled)
Enc10 Drive encoder trip: Servo mode phasing failure because encoder phase angle (Pr 3.25 or Pr 21.20) is incorrect
198
Check the encoder wiring.
Perform an autotune to measure the encoder phase angle or manually enter the correct phase angle into Pr 3.25 (or Pr 21.20).
Spurious Enc10 trips can be seen in very dynamic applications. This trip can be disabled by setting the speed threshold in Pr 3.08 to
a value greater than zero. Caution should be used in setting the over speed threshold level as a value which is too large may mean
that an encoder fault will not be detected.
Enc11
Drive encoder trip: A failure has occurred during the alignment of the analog signals of a SINCOS encoder with the digital
count derived from the sine and cosine waveforms and the comms position (if applicable). This fault is usually due to noise
on the sine and cosine signals.
161
Check encoder cable shield.
Examine sine and cosine signals for noise.
Enc12 Drive encoder trip: Hiperface encoder - The encoder type could not be identified during auto-configuration
162
Check encoder type can be auto-configured.
Check encoder wiring.
Enter parameters manually.
Enc13
Drive encoder trip: EnDat encoder - The number of encoder turns read from the encoder during auto-configuration is not a
power of 2
163 Select a different type of encoder.
Enc14
Drive encoder trip: EnDat encoder - The number of comms bits defining the encoder position within a turn read from the
encoder during auto-configuration is too large.
164
Select a different type of encoder.
Faulty encoder.
Enc15
Drive encoder trip: The number of periods per revolution calculated from encoder data during auto-configuration is either
less than 2 or greater than 50,000.
165
Linear motor pole pitch / encoder ppr set up is incorrect or out of parameter range
i.e. Pr 5.36 = 0 or Pr 21.31 = 0.
Faulty encoder.
Trip Diagnosis
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