Chapter 5 Function parameter
92
Ch
ap
ter 5
alarm of motor overload will be prompted.
User shall correctly set the value of F8.03 according to the Actual motor overload capacity, if
the value is set to too large , which may easily lead to motor overheating and damage while the
inverter will not alarm!
F8.04 Motor overload pre-alarm coefficient
50%~100%
80%
☆
This function is used in the front of motor overload fault protection, and sends a pre-alarm
signal to the control system by DO. The warning coefficient is used to determine the extent of pre-
alarm prior to motor overload protection. The higher the value, the smaller the extent of pre-alarm
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 Over-voltage stall gain
0(no over-voltage stall) ~100
0
☆
F8.06
Over-voltage 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 over-voltage
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
Over-voltage stall gain is used for adjusting inhibition over-voltage capability during
deceleration. The greater this value, the stronger inhibition over-voltage capability under the
premise that the over-voltage does not occur, the best is the smaller gain setting.
For the small inertia load, the over-voltage stall gain should be small, otherwise which cause
the slower system dynamic response. For the big inertia load, the over-voltage stall gain should be
large, otherwise the poor inhibitory effect may cause over-voltage fault.
When the overvoltage stall gain is set to 0, the over-voltage 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 PI500-E 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
re-power 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
