510

Positive Soft Stroke Limit Exceeded

Fanuc · αi series AC Servo Motor

What does 510 mean?

The machine has exceeded its positive soft stroke limit, which is a software-defined limit. This indicates incorrect parameter settings for soft limits (No.142) or an invalid move command, potentially causing an unexpected stop.

Common Causes

  • Appropriate values have not been specified for parameter No.142
  • An invalid move command has been specified

Repair Steps

  1. 1

    Check whether appropriate values have been specified for parameter No.142

  2. 2

    Check whether a valid move command is specified

  3. 3

    Move the tool in the opposite direction in jog mode, then perform a reset

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Verified technical data. Last updated: March 2026
Source: Fanuc αi series AC Servo Motor