5 Troubleshooting
5
- 55 -
Cause
Confirming Methods
Corrective Action
2. UVW cable or
encoder cable breaks.
Check wirings.
Reconnect the UVW cable. Power
cables of servo motor and power cables
UVW of servo drive must be one-to-one
correspondence. If necessary, replace a
new cable and ensure reliable connection.
3. Motor rotor is locked
due to mechanical
factors.
Check running reference and motor speed
(H0B-00) by using the drive debugging
platform of Inovance or operating panel.
Running reference in the position control
mode: H0B-13 (input reference pulse
counter)
Running reference in speed control: H0B-
01 (speed reference)
Running reference in torque control: H0B-
02 (internal torque reference)
Check running reference in corresponding
mode is not 0 but the motor speed is 0.
Eliminate mechanical factors.
4. Servo drive gain is
low.
Check servo drive position loop gain and
speed loop gain.
1st gain: H08-00 to H08-02
2nd gain: H08-03 to H08-05
Adjust gain manually or perform automatic
gain auto-tuning according to Chapter 6 in
the IS650P User Manual.
5. Input pulse frequency
is high.
Check whether input pulse frequency is too
high if position reference source is pulse.
Acceleration/deceleration time is 0 or too
small.
Reduce position reference frequency or
decrease electronic gear ratio.
When host computer is used to output
position pulses, set acceleration/
deceleration time in host computer.
If host computer is not allowed to set
acceleration/deceleration time, increase
parameters H05-04 and H05-06 to
smoothen position reference.
6. Relative to running
condition, H0A-10
(threshold of position
deviation fault) is too
small.
Check whether the setting of H0A-10 is too
small.
Increase the setting of H0A-10.
7. The servo drive/
motor is faulty.
Monitor running curve on the drive
debugging platform of Inovance:
Position reference, position feedback,
speed reference, torque reference
If position reference is not 0, but position
feedback is always 0, replace servo drive/
motor.
Summary of Contents for IS650P Series
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