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
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
Check the output configuration and commanded value for channel (Chxx) in the Logix Designer application.
Verified technical data. Last updated: March 2026
Related Faults
Source: Allen-Bradley Compact 5000 I/O Analog Modules