Video: What is the status code "PRA" on ATV61 or ATV71 drives?


21 July 2022

PRA code on ATV61 or ATV71 drives? 

Product Line:
Altivar ATV61 ATV71

All models

Drive status is showing PRA on the HMI display.

PRA is not a fault code.  It is a state of the drive.  It means that the power removal function is active. The drive is not detecting 24Vdc on the PWR terminal.

Measure for 24Vdc between +24 to COM to verify the internal power supply. If you don't have 24 Vdc present on the +24 terminal, measure DC voltage between PA+ and PC- to check your DC bus voltage.
Confirm that the factory installed jumper between +24 and PWR is solidly connected.  The jumper is removed if a safety circuit is installed.  Verify continuity of the safety circuit (if installed).

When the voltage on PWR is re-established, the drive status will return to RDY if there is not an active run command, or NST if a run command is active.  To clear NST, remove the run command.