EM11 User’s Manual
5. Description of Function Codes
87
Code
Parameter Name
Setting Range
Default
bb-28
Overvoltage
threshold
200.0~2500.0 V
830.0 V
It is used to set the overvoltage threshold of the frequency inverter. The default values of different voltage
classes are listed in the following table.
Voltage Class
Default Overvoltage
Threshold
Single-phase 220 V
400.0 V
Three-phase 220 V
400.0 V
Three-phase 380 V
830.0 V
Three-phase 480 V
890.0 V
Three-phase 690 V
1300.0 V
Note:
The default value is also the upper limit of the frequency inverter's internal overvoltage protection
voltage. The parameter becomes effective only when the setting of bb-28 is lower than the default value. If
the setting is higher than the default value, use the default value.
Code
Parameter Name
Setting Range
Default
bb-29
Under voltage
threshold
50.0%~150.0%
100.0%
It is used to set the under voltage threshold of Err09. The under voltage threshold 100% of the frequency
inverter of different voltage classes corresponds to different nominal values, as listed in the following table.
Voltage Class
Nominal Value of under
voltage threshold
Single-phase 220 V
200 V
Three-phase 220 V
200 V
Three-phase 380 V
350 V
Three-phase 480 V
450 V
Three-phase 690 V
650 V
Three-phase 1140V
1350V
Code
Parameter Name
Setting Range
Default
bb-30
Brake unit use ratio
0%~100%
100%
It is valid only for the frequency inverter with internal braking unit and used to adjust the duty ratio of the
braking unit. The larger the value of this parameter is, the better the braking result will be. However, too
larger value causes great fluctuation of DC bus voltage during the braking process.
Code
Parameter Name
Setting Range
Default
bb-31
Rapid current limit
0: Disabled
1: Enabled
1
The rapid current limit function can reduce the frequency inverter over current faults at maximum,
guaranteeing uninterrupted running of the frequency inverter.
However, long-time rapid current limit may cause the frequency inverter to overheat, which is not allowed.
In this case, the frequency inverter will report Err40, indicating the frequency inverter is overloaded and
needs to stop.
5. Description of Function Codes
EM11 User’s Manual
88
Code
Parameter Name
Setting Range
Default
bb-32
Fault protection
action selection 1
Unit's digit: Motor overload, Err11.
0: Free stop
1: Stop according to the stop mode
2: Continue to run
Ten's digit: Power input phase loss, Err12.
Same as unit's digit
Hundred's digit: Power output phase loss, Err13.
Same as unit's digit
Thousand's digit: External equipment fault, Err15.
Same as unit's digit
Ten thousand's digit: Communication fault, Err16.
Same as unit's digit
00000
bb-33
Fault protection
action selection 2
Unit's digit: Encoder/PG card fault, Err20.
0: Free stop
Ten's digit: EEPROM read-write fault, Err21.
0: Free stop
1: Stop according to the stop mode
Hundred's digit : Reserved
Thousand's digit: Motor Overheat, Err25.
Same as unit's digit in bb-32
Ten thousand's digit: Running time reached, Err26.
Same as unit's digit in bb-32
00000
bb-34
Fault protection
action selection 3
Unit's digit: User-defined fault 1,Err27.
Same as unit's digit in bb-32
Ten's digit: User-defined fault 2,Err28.
Same as unit's digit in bb-32
Hundred's digit: Accumulative power-on time
reached,Err29.
Same as unit's digit in bb-32
Thousand's digit: Off load, Err30.
0: Free stop
1: Stop according to the stop mode
2: reduce to 7% of rated motor frequency and continue
running. If the load recovers and it will auto regain to
setting frequency.
Ten thousand's digit: PID feedback lost during running,
Err31.
Same as unit's digit in bb-32
00000
bb-35
Fault protection
action selection 4
Unit's digit: Speed deviation too large, Err42
Same as unit's digit in bb-32
Ten's digit: Motor over-speed, Err43.
Same as unit's digit in bb-32
Hundred's digit: Initial position fault, Err51.
Same as unit's digit in bb-32
00000
If "free stop" is selected, the frequency inverter displays Err** and directly stops.
If "Stop according to the stop mode" is selected, the frequency inverter displays A** and stops according
to the stop mode. After stop, the frequency inverter displays Err**.
If "Continue to run" is selected, the frequency inverter continues to run and displays A**. The running
