Detailed Function Description
73
Terminal
Step
Multi-step speed
reference1
Multi-step speed
reference2
Multi-step speed
reference3
0 OFF OFF OFF
1 ON OFF OFF
2 OFF ON OFF
3 ON ON OFF
4 OFF OFF ON
5 ON OFF ON
6 OFF ON ON
7 ON ON ON
6.12 PB Group-- Protection Function
Function
Code
Name Description
Setting
Range
Factory
Setting
PB.00
Motor
overload
protection
0: Disabled
1: Normal motor
2: Variable frequency motor
0~2 2
1: For normal motor, the lower the speed, the poorer the cooling effect. Based on this
reason, if output frequency is lower than 30Hz, inverter will reduce the motor overload
protection threshold to prevent normal motor from overheat.
2: As the cooling effect of variable frequency motor has nothing to do with running speed,
it is not required to adjust the motor overload protection threshold.
Function
Code
Name Description
Setting
Range
Factory
Setting
PB.01
Motor overload
protection current
20.0%~120.0% 20.0~120.0 100.0%
Figure 6.27 Motor overload protection curve.
The value can be determined by the following formula:
Motor overload protection current = (motor rated current / inverter rated current) * 100%
Notice:
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