EL
ErrorLib
Brands
||
  1. Home
  2. Fanuc
  3. Alpha i Series Servo Amplifier
  4. DS0022
About·Privacy·Terms

ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

DS0022

DUAL CHECK SAFETY IS NOT WORKED

Fanuc · Alpha i Series Servo Amplifier

What does DS0022 mean?

The Dual Check Safety function is unavailable because parameter No.1902#6 is set to 0. This disables a critical safety feature of the system, potentially reducing safety integrity.

Common Causes

  • Dual Check Safety (DCS) function did not perform its verification task correctly.
  • Safety signal path interruption between redundant safety circuits.
  • Mismatched safety parameters in the DCS configuration.
  • Failure in the redundant encoder or speed feedback system.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Set parameter No.1902#6 to 1 to enable the Dual Check Safety function.

Browse all codes in this manual (101)
Verified technical data. Last updated: April 2026

Related Faults

0233Velocity Pulse Count Exceeded0243Position Pulse Count Exceeded0434Velocity Loop Integral Gain Overflow
Source: Fanuc Alpha i Series Servo Amplifier
Open Manual (Page 125)Search more codes in this manual