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OperReqInv (Status.4)

D3SD Multiple Operator State Requests

Allen-Bradley · Logix 5000 Advanced Process Control and Drives

¿Qué significa OperReqInv (Status.4) ?

The D3SD instruction received simultaneous requests from multiple operator state bits. This creates a conflict, making it impossible for the instruction to determine the intended operator command.

Causas comunes

  • Multiple OperReq inputs (e.g., Oper0Req, Oper1Req) are active concurrently, indicating conflicting operator requests.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Review the operator interface and associated logic for the D3SD instruction — confirm that only one operator state request bit can be active at any given time, as described in the 'Commanded State in Program Control' section.

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Datos técnicos verificados. Última actualización: March 2026

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Fuente: Allen-Bradley Logix 5000 Advanced Process Control and Drives