80 Rockwell Automation Publication D2-3518-4 - January 2020
Chapter 9 Parameter Descriptions
Set to the motor nameplate rated power. The motor nameplate power is used
with the other nameplate values to calculate default values for motor parameters
to assist the commissioning process. This is entered in horsepower or in kilowatts
as selected in parameter 46.
Set to the power units shown on the motor nameplate. This parameter
determines the units for parameter 45.
Selects the output frequency below which the motor operating current is derated.
The motor thermal overload then generates a fault at lower levels of current. For
all settings of overload Hz other than zero, the overload capacity is reduced to
70% when output frequency is zero.
Sets the RMS amps threshold for motor overload fault. In order for the motor
overload fault (48) to occur, it must be enabled using inverter parameter Fault
Config 1 (238).
The drive output current is visible in inverter parameter Output Current (3).
The motor overload fault occurs under these conditions:
• If the drive output (motor) current is 138% of Motor OL Amps, the fault
occurs at 1.5 seconds.
• If the drive output (motor) current is greater than 138% of Motor OL
Amps, the fault occurs in less than 1.5 seconds.
• If the drive output (motor) current is between 102% and 138% of Motor
OL Amps, the fault occurs in greater than 1.5 seconds.
• If the drive output (motor) current is less than 102% of Motor OL Amps,
the fault does not occur.
46
Mtr NP Pwr Units
Range: 0 = Horsepower
1 = kilowatts
Default: Based on Drive Type
Access: 0 Path: Motor Control > Motor Data
See also:
47
Motor OL Hertz
Range: 0.0...400.0 Hz [0.1 Hz]
Default: 0
Access: 0 Path: Motor Control > Motor Data
See also: 42, 48, 220
48
Motor OL Amps
Range: 1.0...2000.0 [0.1 A]
Default: Based on Drive Type
Access: 1 Path: Motor Control > Motor Data
See also: 42, 47, 220
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