Channel Data Uncertain / Operating Temperature Out of Range

What does Ptxx.Uncertain mean?

This boolean tag indicates that the channel data for Ptxx might be inaccurate, though the degree of inaccuracy is unknown. A tag value of '1' is set when the module has reached a critical operating temperature or is operating higher than the acceptable temperature range. For standard modules, it can also indicate data under manual or override control.

• Module operating temperature is at or above its critical threshold, potentially affecting sensor accuracy.
• Module operating temperature is higher than the acceptable operating temperature, stressing components.
• Module operating outside its specified environmental or electrical range for channel Ptxx.
• Channel Ptxx data being manually overridden or under manual control (for standard modules).

Click steps to track your progress.

1. 1

   Verify the ambient temperature around the module is within the specified operating range (refer to module technical data for limits).

2. 2

   Ensure proper airflow around the module and remove any obstructions blocking ventilation to the module.

3. 3

   Allow the module to cool down naturally; the tag automatically resets to '0' once the over-temperature condition is removed.

4. 4

   For standard modules, check for any manual overrides or control actions on channel Ptxx data in Studio 5000 Logix Designer.