Modbus Master Command Parity Error

What does I xx .Command yy .ParityError mean?

This boolean tag indicates that a parity error occurred during the communication of a specific Modbus master command (Command yy). A value of 1 (Occurrence) means a data transmission error was detected due to incorrect parity. This suggests corruption in the serial data stream, preventing reliable data exchange.

• Incorrect parity setting on the module or Modbus slave device
• Noise or electromagnetic interference (EMI) on the serial communication line
• Damaged or improperly connected serial communication cable

Click steps to track your progress.

1. 1

   Verify the parity setting in the module's configuration matches the Modbus slave device's setting.

2. 2

   Inspect the serial communication cable for physical damage or loose connections at both ends.

3. 3

   Check for sources of electromagnetic interference (EMI) near the communication line and implement shielding if necessary.