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Fault code 181 in allen bradley PowerFlex 753 drive

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Cause : Fwd End Limit comes when the selected digital input for one of the end limit switches, P196 [DI Fwd End Limit] or P198 [DI Rev End Limit], has detected a falling edge and P313 [Actv SpTqPs Mode] is not set to 1 “Speed Reg.”

  • If digital limits (hardware signals) are in use, ensure that the digital inputs are connected to normally closed contacts. When the end limit is reached the contacts open.
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