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I x .DF1Master.PriorityPollError

DF1 Master Priority Poll Error

Allen-Bradley · Compact 5000 I/O Serial Module

What does I x .DF1Master.PriorityPollError mean?

This boolean tag for DF1 Master module 'x' indicates that an error occurred during a priority polling cycle. A value of 1 signifies that the priority poll did not complete successfully, potentially disrupting critical, time-sensitive data exchange with a high-priority slave device.

Common Causes

  • No response received from the polled priority node within the configured communication timeout period.
  • Invalid or malformed response received from the priority node.
  • Communication interference or excessive noise on the DF1 channel preventing reliable data transmission.
  • Priority slave device address configured incorrectly or not powered on.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the configured address of the Priority Poll Node (e.g., in the `Ox.DF1Master.PriorityPollNode` array) matches the physical address of the slave device.

  2. 2

    Check communication settings for DF1 Master channel 'x', including baud rate, parity, and stop bits, to ensure they match all connected slave devices.

  3. 3

    Ensure the priority slave device is powered, operational, and properly connected to the DF1 network.

  4. 4

    Measure signal integrity on the DF1 bus for channel 'x' to detect excessive noise or signal degradation.

Browse all codes in this manual (28)
Verified technical data. Last updated: April 2026

Related Faults

Flashing redRecoverable Module Fault / Firmware Update Issue / Connection TimeoutI x .ASCII.FaultGeneric ASCII Channel Data FaultI x .DF1.ConnectionFaultedDF1 Connection Faulted
Source: Allen-Bradley Compact 5000 I/O Serial Module
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