Rockwell Automation Allen-Bradley PowerFlex 4M, Руководство по обслуживанию оборудования

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Rockwell Automation Publication 20P-TG003B-EN-P - September 2021 21
Component Test Procedures Chapter 2
• If the voltage measurements above are correct but the value of
parameter 466 [AC Line Voltage] is incorrect, replace the control
board.
5. Remove the ribbon cable connected to XR on the control board and pulse
transformer board and test the continuity of the cable using the
measurements in
Table 25 on page 134 .
If the measurements on the XR cable are correct, replace the pulse
transformer board.
Troubleshoot an Armature
Bridge Failure If the drive is running unstable or faults with an Overcurrent Fault (F13) an
armature bridge failure may have occurred. All of the signals going to and coming
from the SCR bridges are transmitted via the ribbon cable connected to XR on
the control board and can be measured at these points. See
Figure 29 on page 136
for location of the XR connector on the control board.
1.
Read the General Safety Precautions on page 10 .
2. Remove the protective covers from the drive. See Protective Cover
Removal and Installation on page 43 .
3. If using a DC output contactor, disconnect the cable from XR on the
control board and measure the signal for each SCR gate as indicated in the
table below:
IMPORTANT These checks cannot be completed with an AC contactor in use.
Signal Name XR Cable Pin Gate Note
MP MN
IT1 27 G1 G04
IT2 29 G2 G05
IT3 31 G3 G06
IT4 21 G4 G01
IT5 23 G5 G02
IT6 25 G6 G03
MN 33 – – Negative bridge MN - active when high (+5V)
MP 34 – – Positive bridge MP - active when high (+5V)