084B0000
Encoder Communications Error
Omron · NJ/NX-series Machine Automation Controller
What does 084B0000 mean?
The Servo Drive received illegal or corrupted data from the encoder multiple times, exceeding a specified error threshold. This suggests a problem with data integrity during communication, possibly due to electrical interference or power issues.
Common Causes
- Electrical noise interfering with the encoder cable data transmission
- Contact failure of encoder signal lines
- Physical disconnection affecting encoder data
- Power supply undervoltage to the encoder
Repair Steps & Checklist
Click steps to track your progress.
- 1
Measure the power supply voltage provided to the encoder at its input terminals.
- 2
Verify the integrity of all encoder signal lines by checking continuity and checking for proper termination.
- 3
Visually inspect all physical cable connections between the encoder and Servo Drive for disconnection or contact failure.
- 4
Verify proper grounding and shielding of the encoder cable to mitigate noise.
Verified technical data. Last updated: March 2026
Related Faults
Source: Omron NJ/NX-series Machine Automation Controller