Description of Fault Codes
‑79‑
Cause
Troubleshooting
Solution
The servo drive gain is too
low.
Check the position loop gain
and speed loop gain of the
servo drive.
1st gain set: H08.00...H08.02
2nd gain set: H08.03...H08.05
Adjust the gain values
manually or use gain auto‑
tuning.
5. The input pulse frequency
is high.
When the position reference
source is pulse reference,
check whether the input
pulse frequency is too high
or whether the acceleration/
deceleration time is set to 0
or an excessively low value.
Reduce the position
reference frequency or the
electronic gear ratio.
If position pulses are
outputted through the host
controller, you can set the
acceleration/deceleration
time through the host
controller directly. If not,
increase the values of
H05.04 and H05.06.
6. The value of H0F.08
(Threshold of excessive
position deviation) is too
low under current operating
conditions.
Check whether the value of
H0F.08 is too low.
Increase the setpoint of
H0F.08.
7. The servo drive/motor is
faulty.
Monitor the operation
waveform through the
oscilloscope function in the
software tool: position
references, position
feedback, speed references,
and torque references.
If the position reference is
not 0 but the position
feedback is always 0, replace
the servo drive or motor.
● EB03.0: Electronic gear ratio beyond the limit ‑ H05.02
Description:
The electronic gear ratio exceeds the limit: (0.001–4000 x Encoder resolution/
10000).
Cause
Troubleshooting
Solution
The electronic gear ratio
converted by converted
exceeds the maximum gear
ratio or is less than the
minimum gear ratio.
Check if the electronic gear
ratio is within the range of
0.001–4000 × Encoder
resolution/10000.
Change the value of H05.02.
● EB03.1: Electronic gear ratio beyond the limit ‑ Electronic gear ratio 1
Description:
The electronic gear ratio exceeds the limit: (0.001–4000 × Encoder resolution/
10000).
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