97
Auto Tach Switch
Allen-Bradley · PowerFlex 750 AC Drive
What does 97 mean?
This fault indicates a problem with the drive's feedback system, where either the tach switch has occurred while the alternate feedback device failed, or the tach switch has not occurred, the Auto Tach Switch option is enabled, and both primary and alternate devices have failed. This condition directly impacts speed control and feedback integrity, potentially leading to unstable operation or unexpected drive behavior if not resolved.