Rockwell Automation Allen-Bradley PowerFlex 4, User Manual

Page: 56 / 94

3-20 Programming and Parameters
Advanced Program Group
(continued)
A089 [Current Limit]
Maximum output current allowed before current limiting occurs.
Values Default Drive Rated Amps
×
1.5
Min/Max: 0.1/(Drive Rated Amps
×
1.8)
Display: 0.1 Amps
A090 [Motor OL Select]
Related Parameter(s): P032
Drive provides Class 10 motor overload protection. Settings 0-2 select the derating factor for the I
2
t
overload function.
Options 0 “No Derate” (Default)
1 “Minimum Derate”
2 “Maximum Derate”
Min Derate
0
80
100
60
40
20
No Derate
0
80
100
60
40
20
% 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
0 200 175 125 100 75 50 25
0 200 175 150 125 100 75 50 25
A091 [PWM Frequency]
Sets the carrier frequency for the PWM output waveform. The chart below provides derating
guidelines based on the PWM frequency setting.
Important: Ignoring derating guidelines can cause reduced drive performance.
Values Default 4.0 kHz
Min/Max: 2.0/16.0 kHz
Display: 0.1 kHz
68
84
88
80
76
96
100
92
72
64
60
56
52
8
7
6 5 4 3 2 1 15
14
16 13 12 11 10 9
userman.book Page 20 Friday, June 21, 2002 2:48 PM