88
Software Handshake Error
Allen-Bradley · PowerFlex 700
What does 88 mean?
A microprocessor handshake error has occurred. This indicates an internal communication or processing issue within the drive's control software/hardware, preventing proper execution.
Common Causes
- Failure in the software communication handshake protocol.
- Synchronization issue between control units or modules.
- Data mismatch during inter-process communication.
- Timing violation in software message exchange.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Replace the Main Control Board.
Verified technical data. Last updated: March 2026
Related Faults
Source: Allen-Bradley PowerFlex 700