Rockwell Automation 25B PowerFlex 520-Series Adjustable Frequency AC Drive User Manual - Manual (Page 117)

Rockwell Automation Publication 520-UM001G-EN-E - September 2014 117
Programming and Parameters Chapter 3
Advanced Program Group (continued)
A490 [Load Loss Level] Related Parameter(s): A491
PowerFlex 525 only.
Provides a software trip (Load Loss fault) when the current drops below this level for the time specified in A491 [Load Loss Time].
Values Default: 0.0 A
Min/Max: 0.0/Drive Rated Amps
Display: 0.1 A
PF 525
A491 [Load Loss Time] Related Parameter(s): A490
PowerFlex 525 only.
Sets the required time for the current to be below A490 [Load Loss Level] before a Load Loss fault occurs.
Values Default: 0 s
Min/Max: 0/9999 s
Display: 1 s
PF 525
A492 [Stall Fault Time]
Sets the time that the drive remains in stall mode before a fault is issued.
Options 0 “60 Seconds” (Default)
1 “120 Seconds”
2 “240 Seconds”
3 “360 Seconds”
4 “480 Seconds”
5 “Flt Disabled”
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
0 200 175 150 125 100 75 50 25 0 200 175 150 125 100 75 50 25 0 200 175 150 125 100 75 50 25
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”