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Rockwell Automation Publication 20P-TG001C-EN-P - February 2018
Chapter 2
Component Test Procedures
A malfunctioning thyristor is connected to the relative gate. For example, if the
tested signal is at XR25 and the positive bridge is active (MP high) from the
following figure you can deduce that SCR connected to gate G6 is open.
Figure 5 - Open Thyristor Example
Troubleshoot a Field Current
Loss Fault
If the drive faults with a “Field Current Loss” fault (F6) and there is low or
incorrect field current present at the motor, as seen in parameter 351 [Field
Current], complete the steps in Low or Incorrect Field Current on page
. If
the drive faults with a “Field Current Loss” fault (F6) and there is no field
current present at the motor, as seen in parameter 351 [Field Current],
complete the steps in No Field Current on page
5V
0V
XY19
