Supported Formats
Every Allen-Bradley file type
From modern ControlLogix to legacy SLC 500, plus FactoryTalk View HMI screens. One viewer for everything.
Studio 5000 Export
ControlLogix, CompactLogix, GuardLogix
1756-L8x, 1769-L3x
Native Project
Full Studio 5000 project files
All Logix controllers
RSLogix 500
SLC 500, MicroLogix 1000-1400
SLC 5/01-5/05, ML1000-1400
FactoryTalk View ME
Free with any PLC file -- view HMI displays, tags, and navigation
PanelView Plus, PanelView Plus 7
Instructions supported
From basic XIC/OTE to motion control. Every instruction explained in plain English.
AI Explanations
Click any rung. Get instant understanding. Choose friendly, technical, or operator mode.
Tag Browser
Search thousands of tags instantly. Filter by type, scope, or usage.
Cross Reference
Find every place a tag is used. Trace signal flow through your program.
No Installation
Runs in your browser. Works on any device. Start viewing in seconds.
Upload
Drop your L5X, ACD, RSS, or MER file
Browse
Navigate programs, routines, tags
Understand
Get AI explanations in plain English
Train
Generate operator training docs from code
Built for
Maintenance Technicians
Understand unfamiliar machine code during troubleshooting without needing Studio 5000.
Controls Engineers
Review programs from integrators or legacy systems. Document code with AI-generated explanations.
Training Teams
Auto-generate operator training documents directly from PLC code. Safety procedures, device references, alarm guides, and quizzes -- no manual writing required.
Why PLC Company
The smarter way to view PLC code
Studio 5000
- $5,000+ license cost
- Windows only
- Heavy installation required
- Version compatibility issues
- No AI explanations
- No auto-generated training docs
- Complex interface
PLC Company
- Affordable subscription
- Works on any device
- No installation needed
- Opens any version instantly
- AI-powered explanations
- Auto-generated operator training
- Clean, modern interface
Features
Everything you need to understand PLC code
AI-Powered Explanations
Click any rung and get an instant explanation in plain English. Choose from three modes: Friendly (for beginners), Technical (for engineers), or Operator (for floor personnel). Chat with AI about your entire program.
Interactive Simulation
Toggle tags and watch power flow through your ladder logic in real-time. Simulate timers and counters. Inject faults to test logic. See exactly what would happen on the real PLC.
Cross Reference & Tracing
Find every rung where a tag is read or written. Trace signal flow upstream and downstream. See call trees for JSR relationships. Find similar or duplicate rungs across your program.
Trend Charts & Watch Window
Monitor multiple tags in real-time with a floating watch window. Graph tag values over time with trend charts. Perfect for understanding timing and sequence behavior.
Safety & Alarm Analysis
Automatically detect E-stops, guard interlocks, light curtains, and safety relays. Find all ALMD and ALMA alarm instructions. Understand your safety system at a glance.
Program Diff & Compare
Compare two versions of your program to see what changed. Color-coded diff view shows added, removed, and modified rungs. Essential for version control and code review.
215+ Instructions Supported
Full support for ladder logic, timers, counters, math, compare, motion control (25+ servo instructions), sequencers, string operations, and more. Plus structured text viewing.
Export & Documentation
Export to PDF with AI explanations, color-coded rungs, and simulation state. Generate CSV tag lists. Create markdown documentation. Print-ready reports for maintenance.
Operator Training Generator
Auto-generate operator training documents from your PLC code. Safety procedures, operating sequences, device references, alarm response guides, and quizzes -- all without manual writing.
FAQ
Common questions
Can I edit PLC code with this tool?
No. PLC Company is a read-only tool designed for viewing and understanding code. For editing, you'll still need Studio 5000 or RSLogix. We focus on doing one thing exceptionally well: helping you understand PLC code.
What file versions are supported?
We support L5X exports from any Studio 5000 version, ACD project files from v20+, RSS files from RSLogix 500, and MER files from FactoryTalk View ME. MER file uploads are free when paired with a PLC project file. MER files show HMI screen layouts, display text, and tag references. Legacy formats are parsed and displayed correctly regardless of the original software version.
How accurate are the AI explanations?
Our AI is trained on PLC programming patterns and understands Allen-Bradley instruction sets deeply. It considers tag names, comments, and context to provide meaningful explanations. You can choose Technical mode for precise details or Friendly mode for simplified overviews.
Is my code secure?
Yes. Files are processed in secure, isolated environments. We don't store your PLC code permanently or share it with third parties. Your intellectual property remains yours.
Does it work offline?
Currently, PLC Company requires an internet connection for AI features. The core viewing functionality processes files locally in your browser for speed and privacy.
What about safety-rated programs?
PLC Company displays safety program structure, safety tags, and GuardLogix-specific content. Safety instructions are clearly marked and explained appropriately.
Ready to view your code?
Drop your file and start exploring in seconds.
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