108 Rockwell Automation Publication 520-UM001A-EN-E - February 2013
Chapter 3 Programming and Parameters
Advanced Program Group (continued)
A493 [Motor OL Select] Related Parameter(s): P032, P033
Drive provides Class 10 overload protection. Settings 0...2 select the derating factor for the I
2
t overload function.
Options 0“No Derate” (Default)
1“Min. Derate”
2 “Max. Derate”
Min Derate
0
80
100
60
40
20
% of [Motor OL Curent]
No Derate
0
80
100
60
40
20
% of [Motor NP Hertz]
% of [Motor OL Curent]
% of [Motor NP Hertz]
% of [Motor OL Curent]
% of [Motor NP Hertz]
Max Derate
0
80
100
60
40
20
0
200
175
150
125100755025
0
200
175
150
125100755025
0
200
175
150
125100755025
A494 [Motor OL Ret]
Selects whether the motor overload counter is saved on power-down or reset on power-up.
Options 0“Reset” (Default)
1“Save”
A495 [Drive OL Mode]
Determines how the drive handles overload conditions that would otherwise cause the drive to fault.
Options 0“Disabled”
1“Reduce CLim”
2 “Reduce PWM”
3 “Both-PWM 1st” (Default)
A496 [IR Voltage Drop] Related Parameter(s): P040
Value of volts dropped across the resistance of the motor stator (autotune) for induction motor.
Values Default: Based on Drive Rating
Min/Max: 0.0/230.0V AC
Display: 0.1V AC
A497 [Flux Current Ref] Related Parameter(s): P040
This is the current necessary for full motor flux. The value should be set to the full speed no-load current of the motor.
Values Default: Based on Drive Rating
Min/Max: 0.00/[Motor NP FLA]
Display: 0.01 A
A498 [Motor Rr]
Rotor resistance of induction motor.
Values Default: Based on Drive Rating
Min/Max: 0.00/655.35 ohm
Display: 0.01 ohm
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