PLC Assistant — Allen-Bradley PLCs
Ask Your PLC
Program Anything
Upload your Allen-Bradley file and ask questions in plain English. The PLC Assistant reads your logic, tags, and I/O, then answers with clickable citations back to the exact rung, all without Studio 5000.
- The PLC Assistant answers questions about your Allen-Bradley program in plain English, with citations back to the exact rung.
- Three modes cover ladder logic (Code), FactoryTalk View screens (HMI), and uploaded manuals and wiring diagrams (Docs).
- It answers from your real file (tags, I/O, recovered comments, and alarm messages), not generic PLC theory.
- No Studio 5000 required. Upload an ACD, L5X, or RSS file and ask questions directly in your browser.
What the Assistant
Can Do
Ask in Plain English
No query syntax to learn. Ask what a rung does, why an output is off, or what a tag controls, and get a direct answer written from your actual program.
Answers With Rung Citations
Every answer about code links back to the exact rung and routine it came from, so you can click through and verify the logic instead of trusting a black box.
Three Focused Modes
Code mode explains and traces ladder logic. HMI mode explores FactoryTalk View screens and their tags. Docs mode answers questions about manuals and wiring diagrams you upload.
Reads Your Documentation
The assistant sees recovered rung comments, tag descriptions, and even alarm messages from the file, so it answers with the original engineer's intent, not generic theory.
Troubleshoot Faster
Point it at a stuck output or an unexpected fault and it walks the interlocks and conditions that control that point, so you find the blocking condition in seconds.
Attach Images and Keep History
Attach a photo of a panel or fault screen, keep a searchable history of every conversation per project, and export answers to share with your team.
What is the PLC Assistant?
The PLC Assistant is a chat interface built on top of your parsed Allen-Bradley program. When you upload a file, the tool reads every program, routine, rung, tag, and I/O module, plus any comments and documentation it can recover. You can then ask it:
- What does this rung or routine do, in plain language?
- Where is a given tag read, and where is it written?
- Which conditions and interlocks control a specific output?
- What module is in a given slot, and what is wired to it?
- How does a sequence step through its states?
In our testing, the most useful part is the citations: every answer about logic links back to the rung it came from, so you are never guessing whether the assistant made something up. You click through and see the real ladder. It answers from the actual file, which means it reflects how your machine is really built, not a textbook example.
How to Ask Your Program Questions
Upload your PLC file
Upload your Allen-Bradley ACD, L5X, or RSS file to plc.company. The PLC Assistant reads the whole program automatically.
Open the assistant
Open the chat panel and pick a mode: Code for ladder logic, HMI for screens, or Docs for uploaded manuals.
Ask in plain English
Type a question the way you would ask a colleague: "what turns on the infeed conveyor?" or "where is Motor_Run written?"
Verify against the logic
Click the rung citations in the answer to jump straight to the referenced ladder logic and confirm it yourself.
Ask Your PLC Program Anything
Upload your Allen-Bradley ACD, L5X, or RSS file and start asking questions in plain English
Drop your PLC file here
or browse to select
Frequently Asked Questions
What is a PLC Assistant?
A PLC Assistant is a tool that reads your Allen-Bradley program and answers questions about it in plain English. Instead of manually scrolling through hundreds of rungs, you can ask things like "what does this rung do?", "where is this tag used?", or "why won't this output turn on?" and get a direct answer, with links back to the exact ladder logic it is describing.
Can I ask questions about my PLC program without Studio 5000?
Yes. Upload your ACD, L5X, or RSS file to plc.company and the PLC Assistant reads the whole program, including tags, I/O, routines, and comments, in your browser. You do not need Studio 5000, RSLogix, or any Rockwell license to ask questions and get answers about your logic.
What can the PLC Assistant answer?
It explains what a rung or routine does, traces where a tag is read and written, describes I/O module assignments, walks through a sequence step by step, and helps troubleshoot why a condition is or is not met. It answers from your actual program (the tags, addresses, and recovered comments in your file), not generic PLC theory.
Does the assistant cite the actual ladder logic?
Yes. Answers about code include clickable citations that jump straight to the referenced rung, so you can verify the answer against the real logic instead of taking it on faith. The assistant works from the parsed program, so it points at the rung and routine that actually contains the logic it describes.
Which Allen-Bradley files does the PLC Assistant support?
The assistant works with ACD and L5X files from Studio 5000 (ControlLogix, CompactLogix, GuardLogix) and RSS files from RSLogix 500 (SLC 500, MicroLogix). It can also answer questions about FactoryTalk View ME (.MER) HMI screens and about equipment manuals or wiring diagrams you upload alongside the program.
Pro plans are now available
Starts at $300/month per file. View ladder logic, trace tags, compare versions, and chat with AI about your code — no Studio 5000 license required.