Chxx.Underrange

Channel Output Underrange (5069-OF4, 5069-OF4K, 5069-OF8)

Allen-Bradley · Compact 5000 I/O Analog Modules

What does Chxx.Underrange mean?

This boolean tag indicates that the channel (xx) data is beneath the underrange threshold for this channel. For example, when operating in the 4-20 mA output range, the underrange threshold is <3.6 mA, and an output signal of 0 mA would set this tag to 1.

Common Causes

  • Output signal from channel (Chxx) is below the specified underrange threshold (e.g., <3.6 mA for a 4-20 mA output).

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Measure the output signal at channel (Chxx) terminals to verify it is within the expected operating range (e.g., >3.6 mA for 4-20 mA).

  2. 2

    Check the output configuration and commanded value for channel (Chxx) in the Logix Designer application.

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Verified technical data. Last updated: March 2026

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Source: Allen-Bradley Compact 5000 I/O Analog Modules