Fuji Electric FRENIC-Ace series - 5 ] Driving a Fuji Dedicated IM (MVK Series) under Vector Control with Speed Sensor

4.8 Configuring Function Codes for Drive Controls
4-20
■ Tuning errors (For IM)
If the inverter finds any abnormality in the tuning results or any error in the tuning process, it displays
er7 and
discards the tuning data.
When the tuning error (
er7 ) appears, check that:
- The inverter's output (secondary) circuit is opened or not.
- The mechanical brake is applied or not.
- The terminal command BX (“Coast to a stop”) is turned ON or not.
- Any function code is wrongly configured.
Listed below are possible causes that trigger tuning errors and measures.
Possible tuning
error causes
er7
error subcode
Details and Measures
Sequence error
7
8
9
Before completion of tuning, a run command has been turned OFF. Or
during tuning, terminal command STOP (“Force to stop”) or BX (“Coast
to a stop”) has been entered.
 Do not stop the inverter running until completion of tuning.
Output current
error
6
10
During tuning, an excessively large current has flown.
 Release a mechanical brake or take any other measure to remove the
cause resulting in overcurrent.
Error in tuning
results
1
2
3
4
An interphase voltage unbalance or output phase loss has been
detected.
Tuning has resulted in an abnormally high or low value of a parameter
due to the output circuit opened.
 Check motor cable (disconnection, short circuit or grounded).
Tuning frequency
error
(only when P04=2)
13
The maximum frequency or the frequency limiter (high) has limited the
output frequency.
 Increase the F03 and F15 settings to values greater than 50% of the
base frequency 1 (F04).
Occurrence of
alarm
15
During tuning, any alarm has occurred.
 Check the contents of the multiple alarm and remove the error cause.
For details, refer to Chapter 6 “TROUBLESHOOTING.”
Acceleration
timeout
(only when P04=2)
18
The output frequency has not reached 50% of the base frequency within
the specified acceleration time “F07×300%”.
 Increase the F07 setting.
If any of these errors occurs, remove the error cause and perform tuning again, or consult your Fuji Electric
representative.
If a filter other than the Fuji optional output filter (OFL-

-

A) is connected to the inverter's output
(secondary) circuit, the tuning result cannot be assured. When replacing the inverter connected with such
a filter, make a note of the old inverter’s settings for the primary resistance %R1, leakage reactance %X,
no
-load current, and rated slip frequency, and specify those values to the new inverter’s function codes.
Vibration that may occur when the motor's coupling is elastic can be regarded as normal vibration due to
the output voltage pattern applied in tuning. The tuning does not always result in an error; however, run the
motor and check its running state.
[ 5 ] Driving a Fuji dedicated IM (MVK series) under vector control with speed sensor
(1) Configuring the function codes of motor parameters
If the motor is driven under vector control with speed sensor (F42* = 6), it is necessary to set the motor parameters.
If the dedicated motor for Fuji vector control (MVK series) is used, the motor parameters will be notified separately.
After setting P99 = 4 and initializing by H03 = 2, set the notified parameters.
(2) Configuring the function codes concerning a PG (pulse generator) and PG signals
For details, refer to “4.8.1 [ 3 ] (2) Configuring the function codes concerning a PG (pulse generator) and PG
signals.”