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Description of Function Codes
Group F9: Fault and Protection
Motor overload protection
P9-00
Setting Range
Motor overload protection gain
P9-01
Ÿ
P9-00 =0
The motor overload protective function is disabled. The motor is exposed to potential damage
due to overheating. A thermal relay is suggested to be installed between the AC drive and the
motor.
Ÿ
P9-00 =1
The AC drive judges whether the motor is overloaded according to the inverse time-lag curve of
the motor overload protection.
The inverse time-lag curve of the motor overload protection is:
220% x P9-01 x rated motor current (if the load remains at this value for one minute, the AC drive
reports motor overload fault), or 150% x P9-01 x rated motor current (if the load remains at this
value for 60 minutes, the AC drive reports motor overload fault)
Set P9-01 properly based on the actual overload capacity. If the value of P9-01 is set too large,
damage to the motor may result because the motor overheats but the AC drive does not report the
alarm.
Motor overload warning
P9-02
This function is used to give a warning signal to the control system via DO before motor
overload protection. This parameter is used to determine the percentage, at which pre- warning is
performed before motor overload. The larger the value is, the less advanced the pre-warning will
be.
When the accumulative output current of the AC drive is greater than the value of the overload
inverse time-lag curve multiplied by P9-02, the DO terminal on the AC drive allocated with function
6 (Motor overload pre-warning) becomes ON.
selection
0
1
Setting Range
coefficien
Setting Range
Default
Default
Default
50% - 100%
142
PE6000 User Manual
1
Disabled
Enabled
1.00
0.20–10.00
80%
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