Option Communication Error

What does BUS mean?

After initial communication was established, the connection to the option board was lost. This indicates a broken connection or the master device has stopped communicating, leading to loss of control or monitoring through the option card.

• Intermittent or loose connection of the option board within the drive's 2CN slot, causing temporary signal loss.
• Degradation or damage to the communication cable connecting the option board to the network master (e.g., vibration-induced wear, broken conductors).
• External network master device stopping communication or experiencing a fault, leading to a loss of expected messages from the option board.
• Temporary power supply fluctuations or brownouts affecting the option board's operation, causing communication dropouts.
• High levels of electromagnetic interference (EMI) disrupting the communication signals on the network bus.

Click steps to track your progress.

1. 1

   Power cycle the drive and firmly re-seat the option communication board into the 2CN connector, verifying secure attachment.

2. 2

   Inspect the communication cable for signs of wear, physical damage, or loose connections at both the option board and the network master.

3. 3

   Monitor the status of the external network master and other devices on the communication bus to identify if the issue is external to the drive.

4. 4

   Verify stable power supply voltage to the drive and external communication devices using a multimeter or power quality analyzer.

5. 5

   Check for proper grounding and shielding of the communication cable, ensuring separation from high-current power lines.

6. 6

   Review the drive's event log for any other related faults that might indicate a power instability or internal hardware issue affecting the option board.