Inovance MD380T5.5GB User Manual

Description of Function Codes
MD380 User Manual
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Group F9: Fault and Protection
Function Code Parameter Name
Setting Range
Default
F9-00 Motor overload protection selection
0: Disabled
1: Enabled
1
F9-01 Motor overload protection gain
0.20–10.00
1.00
• F9-00 = 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.
• F9-00 = 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 F9-01 x rated motor current (if the load remains at this value for one minute,
the AC drive reports motor overload fault), or
150% x F9-01 x rated motor current (if the load remains at this value for 60 minutes,
the AC drive reports motor overload fault)
Set F9-01 properly based on the actual overload capacity. If the value of F9-01 is set too
large, damage to the motor may result because the motor overheats but the AC drive does
not report the alarm.
Function Code Parameter Name Setting Range Default
F9-02 Motor overload warning coefcient 50%–100% 80%
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 F9-02, the DO terminal on the AC drive
allocated with function 6 (Motor overload pre-warning) becomes ON.
Function Code Parameter Name Setting Range Default
F9-03 Overvoltage stall gain 0 (no stall overvoltage)–100 0
F9-04 Overvoltage stall protective voltage 120%–150% 130%
When the DC bus voltage exceeds the value of F9-04 (Overvoltage stall protective voltage)
during deceleration of the AC drive, the AC drive stops deceleration and keeps the present
running frequency. After the bus voltage declines, the AC drive continues to decelerate.
F9-03 (Overvoltage stall gain) is used to adjust the overvoltage suppression capacity of the
AC drive. The larger the value is, the greater the overvoltage suppression capacity will be.

Inovance MD380T5.5GB Specifications

General

Brand	Inovance
Model	MD380T5.5GB
Category	DC Drives
Language	English