Modbus Slave Channel Data Uncertain

What does I x .Slave.Uncertain mean?

This boolean tag indicates that the channel data for the Modbus slave might be inaccurate, with an unknown degree of unreliability. A value of 1 (Uncertain data) 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 from the Modbus master to the slave
• Temporary internal data processing anomalies in the slave module
• Marginal operating conditions (e.g., fluctuating power, environmental factors) affecting data integrity

Click steps to track your progress.

1. 1

   Troubleshoot the Modbus slave module to identify and correct the cause of data inaccuracy.

2. 2

   Verify the stability and quality of the communication link from the Modbus master.

3. 3

   Inspect physical connections and environmental factors that might affect data integrity at the slave module.