Details about Function Parameters
127
Motor overload
protection value
Fb-01
90%
75%
Conventional motor
0.7 times rated
rotation speed
Rated
rotation
speed
Rotation speed
Variable-frequency motor
or conventional motor
with a separate fan
Action
time (m
)
0
0.1
50%
100%
150%
200%
0.4
1
3
7
10
Motor current
Hot startup
Cold startup
Overload protection
value(%)
After overload protection becomes effective, the motor will not resume operation until the motor
cools down over a period of time.
CAUTION: Motor overload protection only applies to cases where one motor is driven by one
inverter. In cases where more than one motor is driven by the same inverter, heat protection must
be provided for each motor.
Fb-03
Motor Overload Protection
Options
Factory
Settings
00
Modification
×
Units digit: overload detection options
0: Always on 1: During only constant-speed operation
Setting
Range
Tens digit: Overload action options:
0: No action 1: Alarm and continue operation 2: Alarm and free shutdown
Fb-04
Motor Overload Detection Level
Factory
Settings
130.0%
Modification
×
Setting
Range
20.0
~
200.0
%
; the rated motor current is taken as 100
%
Fb-05
Motor Overload Detection Time
Factory
Settings
5.0s
Modification
×
Setting
Range
0.0
~
30.0s
Motor Overload: When the motor current exceeds Fb-04 and is maintained in excess of the time
settings of Fb-05, a response will be made according to the action mode set by Fb-03. This
function may be used to check if any abnormal mechanical load causes an overcurrent.
Fb-06
Motor Underload Protection
Factory
Settings
0
Modification
×
Setting
Range
0: No action 1: Alarm and continue operation 2: Fault and free shutdown
Fb-07
Motor Underload Protection Level
Factory
Settings
30.0%
Modification
×
Setting
Range
0.0
~
100.0
%
; the rated motor current is taken as 100%