Independent manufacturer reference

Rockwell AutomationAllen-Bradley product families & fault codes

Rockwell Automation supplies industrial automation systems, including Allen-Bradley products. This reference covers ControlLogix 5580, CompactLogix 5380 and PowerFlex 750-Series, plus five drive events documented for non-Integrated Motion applications.

Last reviewed September 18, 2026

Rockwell Automation / Allen-Bradley at a glance

Manufacturer: Rockwell Automation
Brand used by selected hardware: Allen-Bradley
Relevant areas: Programmable automation controllers, machine controllers and variable-frequency drives
Selected families: ControlLogix 5580, CompactLogix 5380 and PowerFlex 750-Series
Main engineering and diagnostic environments: Studio 5000 Logix Designer for selected controllers; drive HIM and compatible Rockwell drive software/documentation for PowerFlex 753/755
Diagnostic model: Logix controllers expose controller/module faults and contextual diagnostics; PowerFlex drives use numbered events, faults and alarms organized by port/device and application mode
Manufacturer website: Rockwell Automation ↗

Selected Rockwell Automation / Allen-Bradley product families

ControlLogix 5580

Role: ControlLogix 5580 is an Allen-Bradley controller family for higher-performance and plant-wide control applications.
Typical use: ControlLogix 5580 controllers are used in modular control systems that may include local and distributed I/O, EtherNet/IP devices, motion and safety components.
Diagnostic identifiers: Controller display/indicators, major/minor faults, module properties, diagnostic web pages, Studio 5000 project context
Important: Controller major/minor faults, safety faults, module extended status, instruction errors, CIP/network codes and application-generated alarms are separate namespaces.

CompactLogix 5380

Role: CompactLogix 5380 is an Allen-Bradley controller family aimed at machine and equipment control with integrated communications, I/O and supported motion or safety options.
Typical use: The family is used in machines and smaller distributed systems where controller, Compact 5000 I/O and EtherNet/IP capacity are selected for the application.
Diagnostic identifiers: Controller display, Studio 5000 controller/module diagnostics, Compact 5000 I/O status and application alarms
Important: Both use the Logix 5000 architecture and Studio 5000, so some controller concepts and codes can overlap.

PowerFlex 750-Series

Role: The PowerFlex 750-Series includes Allen-Bradley PowerFlex 753 and PowerFlex 755 AC drives.
Typical use: PowerFlex 753 and 755 drives control AC motors in general-purpose and more advanced machine applications.
Diagnostic identifiers: Event number/text, port, event queue, HIM, parameters, host firmware and application mode
Important: Interpret the complete diagnostic message using the exact device, installed configuration and current manufacturer documentation.

How to diagnose Rockwell Automation / Allen-Bradley devices

Use the complete diagnostic identifier together with the exact device, configuration and manufacturer documentation. The number or display label alone does not establish the cause.

01Identify the device
What to check: Exact product, hardware variant, options and firmware.
Why it matters: Diagnostic meanings depend on the installed configuration.
02Capture the identifier
What to check: Complete code, full message, timestamp and operating state.
Why it matters: A short code can omit the context needed to interpret an event.
03Identify the source
What to check: Controller, module, drive, amplifier, application or connected system.
Why it matters: Similar identifiers can come from different diagnostic systems.
04Read detailed diagnostics
What to check: Device log, engineering software, display and event history.
Why it matters: Detailed records identify the affected component and event sequence.
05Match the correct manual
What to check: Documentation for the exact family, hardware and software version.
Why it matters: This avoids using the meaning from a different product or release.

ControlLogix 5580Controller display/indicators, major/minor faults, module properties, diagnostic web pages, Studio 5000 project context

CompactLogix 5380Controller display, Studio 5000 controller/module diagnostics, Compact 5000 I/O status and application alarms

PowerFlex 750-SeriesEvent number/text, port, event queue, HIM, parameters, host firmware and application mode

PowerFlex 750-Series drive faults

Direct meaning: An undervoltage condition exists when P11 [DC Bus Volts] falls below the value set in P461 [UnderVltg Level]. The event action is configurable through P460 [UnderVltg Action].

Event 4 · UnderVoltage

Event 4UnderVoltage

Documented meaning: An undervoltage condition exists when P11 [DC Bus Volts] falls below the value set in P461 [UnderVltg Level]. The event action is configurable through P460 [UnderVltg Action].