Modbus Master Channel Data Uncertain

What does I xx .Uncertain mean?

This boolean tag indicates that the channel data for the Modbus master can be inaccurate, but the precise degree of inaccuracy is unknown. When set to 1 (Uncertain), it suggests potential issues with data integrity, though not a definitive fault. The tag automatically resets to 0 (Good data) once the condition causing uncertainty is removed.

• Intermittent communication issues affecting data reliability
• Temporary sensor anomalies or signal degradation impacting data integrity
• Environmental interference (EMI/RFI) causing occasional data corruption on the communication line

Click steps to track your progress.

1. 1

   Troubleshoot the module to correct the cause of data inaccuracy, focusing on communication stability.

2. 2

   Review module diagnostics (I xx .DiagnosticActive) for any active diagnostic conditions or prognostics threshold breaches.

3. 3

   Inspect cabling and termination for loose connections or potential sources of electromagnetic interference (EMI).