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. 1

    Replace the Main Control Board.

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Verified technical data. Last updated: March 2026

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