Chapter 5 Function parameter
99
Ch
ap
ter 5
in advance.
When the cumulative amount of inverter output current is greater than the product of the
inverse time curve of overload and F8.04, the inverter multi-function digital DO will output
"Motor Overload Pre-Alarm" ON signal.
F8.05 Overvoltage stall gain
0(no overvoltage stall) ~100
0
☆
F8.06
Overvoltage stall protection voltage /
energy consumption brake voltage
120%~150%(three-phase)
130%
☆
In the process of the inverter deceleration, when the DC bus voltage exceeds the overvoltage
stall protection voltage/the energy consumption brake voltage, the inverter stops deceleration and
maintains at the current operating frequency(if F3.12 is not set to 0, the braking signal is outputted
the energy consumption brake can be implemented by an external braking resistor.) and then
continues to decelerate upon decline of the bus voltage
Overvoltage stall gain is used for adjusting inhibition overvoltage capability during
deceleration. The greater this value, the stronger inhibition overvoltage capability under the
premise that the overvoltage does not occur, the best is the smaller gain setting.
For the small inertia load, the overvoltage stall gain should be small, otherwise which cause
the slower system dynamic response. For the big inertia load, the overvoltage stall gain should be
large, otherwise the poor inhibitory effect may cause overvoltage fault.
When the overvoltage stall gain is set to 0, the overvoltage stall function will be canceled.
F8.07
Input phase loss
protection
Units
digit
Input phase loss protection selection
11
☆
Prohibit
0
Allow
1
Tens digit Contactor actuation protection
Prohibit
0
Allow
1
The input phase loss protection function is only for ST500 G type inverter with 18.5kW or
above, not for the F type inverter with 18.5kW or below and however F8.07 is set to 0 or 1.
F8.08
Output phase loss
protection selection
Prohibit
0
1
☆
Allow
1
Select whether the output phase loss protection is done or not.
F8.09
Power-on short
circuit to ground
Invalid
0
1
☆
Valid
1
You can detect whether the motor is shorted to ground when the inverter is powered on.
If this function is active, the inverter's UVW terminal will output voltage after power-on for a
while.
F8.10 Number of automatic fault reset
0~32767
0
☆
When the inverter selects automatic fault reset, it is used to set the number of times of
automatic fault reset. If the set number of times is exceeded, the inverter remains a failed state.
When set F8.10 (number of automatic fault reset) ≥ 1, inverter will run automatically when
repower after instantaneous power-off.
When fault self-recovery restart uptime over an hour later, it will restore the original setting
of automatic fault reset.
F8.11
Fault DO action selection
during automatic fault reset
OFF
0
0
☆
ON
1
If the inverter automatic fault reset function is set, F8.10 can be used to set whether DO
action is active or not during the automatic fault reset
F8.12 Automatic fault reset interval 0.1s~100.0s
1.0s
☆
It is the waiting time from the inverter fault alarm to automatic fault reset.
F8.13 Overspeed detection value
0.0%~50.0%(maximum frequency)
20.0%
☆
F8.14 Overspeed detection time
0.0s~60.0s
1.0s
☆
This feature is only available when the inverter runs with speed sensor vector control.
When the inverter detects that the actual motor speed exceeds the set frequency, and the excess is
