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26
Rockwell Automation Publication 20P-TG004C-EN-P - September 2021
Chapter 2
Component Test Procedures
4.
Verify that the value of parameter 280 [Nom Mtr Fld Amps] matches the
rated field current value on motor nameplate and make any necessary
corrections.
5.
Remove the bottom control panel and I/O and control terminal covers
from the drive. See Protective Cover Removal and Installation on page
6.
Measure the field current signal on the green LA-LB terminal located on
the control board: LA is the ground and LB is field current signal. The
measured value of the field current at LA-LB should be equal to the value
of parameter 374 [Drv Fld Brdg Cur]. If these values are equivalent, the
voltage across these terminals should be 1.66 VDC.
Note: For lower field current values, the voltage will be proportional.
For example, if the field is set up for 2 A and the motor is rated for 1.5 A,
the measurement at LA-LB will be 1.245 VDC (1.5 / x = 2 / 1.66).
•
If the voltage measurement is incorrect, continue with step 7 below.
•
If the voltage measurement is correct, but the “Field Current Loss” fault
still exists, replace the control board.
7.
Using an ohmmeter, measure the resistance across terminals LA-LB to
verify that the value equals the equivalent resistance as indicated in the
table below (set with DIP switch S14 on the control board).
If the resistance measurement is incorrect, replace the field board.
Field Current Scale
S14-1
S14-2
S14-3
S14-4
S14-5
S14-6
S14-7
S14-8
Equivalent
Resistance
Frame D drives with a rated field supply of 40 A
1 A
OFF
OFF
OFF
OFF
OFF
OFF
ON
Not
used
(OFF)
3333
2 A
OFF
OFF
OFF
OFF
OFF
ON
OFF
1668
4 A
OFF
OFF
OFF
OFF
ON
OFF
OFF
845
6 A
OFF
OFF
OFF
OFF
ON
ON
OFF
560.9
10 A
OFF
ON
OFF
OFF
OFF
OFF
OFF
333.3
20 A
ON
OFF
OFF
OFF
OFF
OFF
OFF
168.5
30 A
ON
ON
OFF
OFF
OFF
OFF
OFF
111.9
40 A
ON
OFF
ON
OFF
OFF
ON
OFF
83.1
Frame D drives with a rated field supply of 70 A
1 A
OFF
OFF
OFF
OFF
OFF
ON
OFF
Not
used
(OFF)
1668
5 A
OFF
ON
OFF
OFF
OFF
OFF
OFF
333.3
10 A
ON
OFF
OFF
OFF
OFF
OFF
OFF
168.5
20 A
ON
OFF
ON
OFF
OFF
ON
OFF
83.1
50 A
OFF
ON
OFF
ON
OFF
OFF
OFF
32.8
70 A
ON
ON
ON
ON
OFF
OFF
OFF
23.9
Содержание Allen-Bradley PowerFlex 20P
Страница 1: ...PowerFlex Digital DC Drive Frame D Bulletin Number 20P Hardware Service Manual Original Instructions ...
Страница 8: ...8 Rockwell Automation Publication 20P TG004C EN P September 2021 Preface Notes ...
Страница 42: ...42 Rockwell Automation Publication 20P TG004C EN P September 2021 Chapter 2 ComponentTest Procedures Notes ...
Страница 108: ...108 Rockwell Automation Publication 20P TG004C EN P September 2021 Chapter 3 Access Procedures Notes ...
Страница 136: ...136 Rockwell Automation Publication 20P TG004C EN P September 2021 Appendix D History of Changes Notes ...
Страница 140: ...140 Rockwell Automation Publication 20P TG004C EN P September 2021 Index Notes ...