Chapter 5 Function parameter
71
Code
Parameter name
Setting range
Factory
default
Change
limiting level
F8.01
Frequency fall rate at
current limiting
0.00 to 100.00Hz/s
10.00Hz/s
☆
During the operation of Inverter, due to the load is too large, the actual rising rate of
motor speed is lower than the rising rate of output frequency of, if no measures are
taken, it will result in acceleration overcurrent fault and afterwards cause that the
inverter trips.
During the operation of inverter, automatic current limiting function detects the output
current, and compares with the current limiting point defined by F8.00, and if the
output current exceeds the current limiting point, the output frequency of inverter will
fall in accordance with the falling rate (F8.01
）
of over current frequency, when it is
detected again that the output current is below the current limiting point, then it
resumes normal operation.
Frequency fall
rate depends on
F8.01
t
t
Output
frequency
Output
current
F8.02
Current limiting action
selection
Current limiting always
valid
0
0
☆
Current limiting invalid at
constant speed
1
Automatic current limiting function is always valid at the state of acceleration and
deceleration, automatic current limiting action selection (F8.02) is used to determine
whether automatic current limiting function is valid or not at constant speed.
F8.02 = 0 indicates that automatic current limiting is valid at constant speed;
F8.02 = 1 indicates that automatic current limiting is invalid at constant speed;
When performing automatic current limiting action, the output frequency may vary, so
the automatic current limiting function is not suitable for the occasion that the more
stable output frequency at constant speed is required.
When the automatic current limiting function is valid, the lower limit setting may affect
the overload capacity of inverter.
F8.03 Motor overload
OFF
0
2
★
