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Expert Allen-Bradley PLC & Control System Repair Services

Is a malfunctioning Allen-Bradley PLC or control system component causing disruptions in your automation system? ROC Industrial specializes in the repair of Allen-Bradley PLCs, including ControlLogix, CompactLogix, SLC 500, MicroLogix, and PLC-5 systems. We offer a fast, reliable, and cost-effective alternative to replacement, minimizing downtime and getting your equipment back in operation quickly. Our technicians are experienced in diagnosing and repairing a wide range of Allen-Bradley PLC issues.


About Allen-Bradley PLCs


Allen-Bradley (Rockwell Automation) is a leading provider of industrial automation solutions, and their PLCs are widely used in a vast array of industries. From large-scale ControlLogix systems to smaller MicroLogix controllers, Allen-Bradley PLCs are known for their reliability, performance, and integration with the Rockwell Automation ecosystem.


Allen-Bradley PLC Models We Repair


  • ControlLogix:1756-L81E, 1756-L82E, 1756-L83E, 1756-L84E, 1756-L85E (ControlLogix 5580)
    1756-L71, 1756-L72, 1756-L73, 1756-L74, 1756-L75 (ControlLogix 5570)
    1756-L61, 1756-L62, 1756-L63, 1756-L64, 1756-L65 (ControlLogix 5560)

  • CompactLogix:5069-L306ER, 5069-L310ER, 5069-L320ER, 5069-L330ER, 5069-L340ER, 5069-L350ER, 5069-L380ER (CompactLogix 5380)
    1769-L36ERM, 1769-L33ERM, 1769-L30ERM, 1769-L27ERM, 1769-L24ERM, 1769-L18ERM, 1769-L16ERM (CompactLogix 5370)

  • SLC 500:1747-L551, 1747-L552, 1747-L553, 1747-L541, 1747-L542, 1747-L543, 1747-L531, 1747-L532, 1747-L533

  • MicroLogix:MicroLogix 1100 (1763-L16...)
    MicroLogix 1200 (1762-L...)
    MicroLogix 1400 (1766-L...)
    MicroLogix 1500 (1764-LSP, 1764-LRP)
    MicroLogix 1000 (1761-L...)

  • PLC-5:1785-L40B, 1785-L40L, 1785-L80B, 1785-L80C, 1785-L60B

  • Other Allen-Bradley Control System Components: We also repair communication modules, I/O modules, power supplies, and other related components.


Common Allen-Bradley PLC Problems We Solve


  • Processor Faults: CPU failures, memory errors, watchdog timer issues.

  • I/O Module Failures: Faulty input or output modules.

  • Communication Problems: Issues with Ethernet/IP, DH+, ControlNet, DeviceNet, or other communication protocols.

  • Power Supply Issues: PLC won't power on, intermittent power.

  • Programming Errors: While we don't typically fix programming errors, we can often identify them as the source of a problem.

  • Component Failures: Failure of internal electronic components.

  • Battery problems


Common Allen-Bradley PLC Fault Codes/Indicators We Fix


Our technicians are experienced in diagnosing and resolving a wide range of Allen-Bradley PLC fault codes and indicator lights, including (but not limited to) the following:


  • ControlLogix/CompactLogix Major Faults: Fault Code 61 (Non-Recoverable Fault), Fault Code 78 (I/O Module Communication Fault), Fault Code 60 (Recoverable Fault).

  • SLC 500 Fault Codes: S:6 status bits indicating processor faults, I/O faults, and communication errors.

  • MicroLogix Fault Indicators: Flashing Fault LED, solid Fault LED, specific blink patterns indicating different fault types.

  • PLC-5 Fault Indicators: Processor Fault LED, Battery Low LED, communication fault LEDs.

  • Communication Fault Indicators: NET LED flashing on an Ethernet module, status indicators on other communication modules.


Don't see your specific fault code or indicator? Don't worry! We can still diagnose and repair your Allen-Bradley PLC. Contact us with the fault information and PLC model for a free evaluation.


Our Allen-Bradley PLC Repair Process


  1. Free Evaluation & Quote: Describe the problem, including any fault codes or indicators, and your Allen-Bradley PLC model. We provide a free, no-obligation quote.

  2. Shipping: Ship the PLC or control system component to our facility.

  3. Diagnosis & Repair: Our technicians use specialized diagnostic equipment, including Rockwell Automation software (RSLogix 5, RSLogix 500, Studio 5000) and hardware, to pinpoint the fault and perform expert repairs.

  4. Testing & Quality Assurance: We thoroughly test the repaired PLC, often using a dedicated test system with compatible I/O modules and simulation software, to ensure it meets original performance specifications.

  5. Fast Turnaround: Minimize downtime.

  6. Warranty: We offer a comprehensive warranty on all Allen-Bradley PLC repairs.


Why Choose ROC Industrial for Allen-Bradley PLC Repair?


  • Expert Technicians: Our team has extensive experience specifically with Allen-Bradley PLCs and control systems.

  • Allen-Bradley-Specific Diagnostic Tools: We use specialized software (RSLogix 5, RSLogix 500, Studio 5000) and hardware for accurate diagnosis.

  • Genuine or Equivalent Parts: We use high-quality replacement parts.

  • Fast Turnaround Times: Minimize downtime.

  • Cost-Effective Solutions: Repair is often much cheaper than replacement.

  • Comprehensive Warranty: We stand behind our work.


Get Your Allen-Bradley PLC Repaired Today!


Contact ROC Industrial for a free quote and expert repair services.

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