EL
ErrorLib
Brands
||
  1. Home
  2. Mitsubishi Electric
  3. MELSEC iQ-R I/O Module
  4. 90  H
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.

90  H

Number of output ON times alarm detection count reached

Mitsubishi Electric · MELSEC iQ-R I/O Module

What does 90  H mean?

The number of output ON times has reached the pre-configured alarm detection count. This alarm indicates that a specific output has been activated a set number of times, potentially signaling that a connected actuator or contactor is nearing its operational lifespan or a process requires monitoring.

Common Causes

  • Output ON times count reached the alarm detection count threshold configured for monitoring output activations.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Set the corresponding bit of 'Number of output ON times value clear request' to 1 (Requested) to clear the accumulated number of output ON times.

Browse all codes in this manual (56)
Verified technical data. Last updated: April 2026

Related Faults

00A12HFailure of Disabling Safety Module1000HPower Shutoff1100HTransmission Interval Monitoring Time Range Error
Source: Mitsubishi Electric MELSEC iQ-R I/O Module
Open Manual (Page 72)Search more codes in this manual