EL
ErrorLib
Brands
||
  1. Home
  2. Allen-Bradley
  3. Logix 5000 Controllers
  4. Subscript Overflow
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.

Subscript Overflow

Subscript Expression Overflow

Allen-Bradley · Logix 5000 Controllers

What does Subscript Overflow mean?

An overflow occurred during the evaluation of a subscript expression. This condition generates a Major Recoverable Fault, indicating that an out-of-range condition exists within the expression's calculation. It may also be recorded as a minor overflow fault if enabled. Calculation of subscript expressions no longer silently produces invalid results, making this fault detection more predictable.

Common Causes

  • Calculation of a subscript expression results in an overflow condition
  • Divide-by-zero error within a subscript expression
  • Subscript expression producing an out-of-range result that exceeds integer limits

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Review all subscript expressions in the application program for potential overflow conditions

  2. 2

    Identify specific expressions that could produce an overflow result, such as division by zero

  3. 3

    Modify the logic of affected subscript expressions to prevent overflow conditions (e.g., add range checks, adjust data types)

  4. 4

    Update any major fault recovery logic in the application to appropriately handle this Major Recoverable Fault

Browse all codes in this manual (17)
Verified technical data. Last updated: April 2026

Related Faults

4/20SFC Array Fault (Suppressible)4/83SFC Array Fault (Suppressible)CVFaulted (Status1.2)Control Variable (CV) Health Bad
Source: Allen-Bradley Logix 5000 Controllers
Open Manual (Page 160)Search more codes in this manual