Modbus Master Command Data Uncertain

What does I xx .Command yy .Uncertain mean?

This boolean tag indicates that the data associated with a specific Modbus master command (Command yy) might be inaccurate, though the extent of the inaccuracy is not quantified. A value of 1 (Uncertain data) points to potential reliability issues with the command's data output. The tag automatically resets to 0 (Good data) once the condition causing uncertainty is removed.

• Intermittent response or inconsistent data from the Modbus slave for Command yy
• Temporary data corruption during transmission of Command yy data
• Timing issues with the execution or reception of data for Command yy

Click steps to track your progress.

1. 1

   Troubleshoot the module to correct the cause of data inaccuracy for Command yy.

2. 2

   Review the Modbus slave device's status and response for Command yy execution.

3. 3

   Check for any underlying Modbus communication issues (e.g., parity, framing, timeout) specifically related to Command yy.