Code P10-10201: I2 Comm Loss
Issue Description & Safety Warning
The Allen-Bradley PowerFlex 750 Drive has triggered a critical I2 Comm Loss alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Type: Non-Reset Fault Coast Indicates that the communication connection from the fiber optic interface board to the power layer interface board has been lost. Once the root cause of the communication fault has been resolved, power must be cycled or a drive reset must be initiated to clear this fault. • Verify the status of the Fiber Loss pin segment of the power-layer interface board LED. • Verify that the fiber optic cables are properly connected to the transceivers. • Verify that the transceivers are properly seated in the ports. • Verify that the fiber optic cable is not cracked or broken. • Verify that power is applied to the fiber optic interface board and power layer interface board.
Source: Allen-Bradley PowerFlex 750-Series AC Drives Programming Manual (750-PM001)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Allen-Bradley PowerFlex 750 Drive Alarms
Allen-Bradley controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code P10-10201 on the PowerFlex 750 Drive identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Allen-Bradley's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 663 Allen-Bradley PowerFlex 750 Drive codes.
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