Cold Junction Data Uncertain (5069-IY4, 5069-IY4K)

What does CJChxx.Uncertain mean?

This boolean tag indicates that the cold junction data for a specific channel (xx) can be inaccurate, though the exact degree of inaccuracy is not known. A value of 1 means the data is uncertain. The tag automatically resets to 0 once the underlying condition is resolved.

• Cold junction data signal slightly outside the channel operating range
• Cold junction channel (CJChxx) is slightly over temperature
• Invalid sensor offset value configured for the cold junction channel
• Calibration fault on the cold junction channel
• Calibration is currently in process on the cold junction channel

Click steps to track your progress.

1. 1

   Verify the cold junction data signal is within the specified channel operating range.

2. 2

   Check the module's operating environment temperature and the cold junction temperature for any slight over-temperature conditions.

3. 3

   Review the sensor offset value configured for the cold junction channel (CJChxx) in the module configuration.

4. 4

   Check the calibration status of the cold junction channel (CJChxx) in the Logix Designer application.

5. 5

   Wait for any ongoing calibration process on the cold junction channel (CJChxx) to complete.