Generate PLC Code with AI
In Seconds, Not Hours
Describe what you need in plain English. The AI generates production-ready SCL code, creates function blocks, and writes it directly into your TIA Portal project. No copy-paste, no manual coding.
Why Engineers Switch to AI Code Generation
10x
Faster than manual coding for repetitive blocks
60+
TIA Portal operations available via AI
0
Lines of code you need to write manually
5min
Setup time — download, install, generate
What Can AI Generate for TIA Portal?
From simple tags to complex function blocks — AI handles it all
SCL Function Blocks (FB)
Motor controllers, PID loops, valve sequences, alarm handlers, state machines — describe the behavior, get production-ready SCL with proper interface, static variables, and error handling.
Data Blocks (DB)
Instance DBs, global DBs, structured data. AI creates them with correct types, default values, and comments based on your project's existing UDTs and naming conventions.
User-Defined Types (UDT)
Define data structures in natural language: "A valve type with position, interlocks, override, and diagnostics." The AI creates IEC 61131-3 compliant UDTs ready for production.
PLC Tag Tables
Import IO lists from CSV/Excel, describe your field devices, or map signals by area. AI creates complete PLC tag tables with addresses, data types, and comments.
Organization Blocks (OB)
Main cycle OB1, startup OBs, time-interrupt OBs, error handling OBs — AI generates the block with proper call structure based on your existing project architecture.
Functions (FC)
Utility functions, conversion routines, calculation blocks. AI generates stateless FCs with clean interfaces, input validation, and inline documentation.
How AI Code Generation Works
T-IA Connect bridges TIA Portal and AI through the MCP protocol
You Describe
Tell the AI what you need in natural language. Be as specific or general as you want: "Create a motor control FB with star-delta starter, thermal protection, and runtime counter."
AI Reads Context
The AI reads your TIA Portal project — existing blocks, UDTs, tags, naming conventions. It understands your code structure before writing a single line.
Code Is Generated
Production-ready SCL code is generated following IEC 61131-3 standards, your project conventions, and best practices. The code includes comments and documentation.
Written to TIA Portal
The AI creates the block directly in TIA Portal, compiles it, and reports any errors. No copy-paste. The block appears in your project tree ready to use.
Real-World Examples
What engineers actually ask the AI to generate
“Create an FB for a conveyor belt with start/stop, speed control (0-100%), jam detection, and emergency stop. Include alarm outputs and runtime counter.”
Complete FB with 12 inputs, 8 outputs, state machine logic, speed ramp, jam detection timer, and detailed interface comments.
“Read my IO list from CSV and create all PLC tags for Area 3 — Filling Station. Map to DB30.”
156 PLC tags created with correct addresses, types (BOOL, INT, REAL), and descriptive comments. DB30 generated with matching structure.
“Refactor FB_ValveControl — it's 800 lines of spaghetti SCL. Clean it up, add proper state machine, and split into sub-functions if needed.”
Restructured into 3 FCs + 1 FB with state machine pattern. Code reduced to 340 lines. All original functionality preserved, compiler verified.
Code Quality You Can Trust
AI-generated code follows industrial standards and best practices
IEC 61131-3 Compliant
Generated SCL follows the IEC 61131-3 standard for structured text. Proper data types, variable scoping, and programming constructs.
Siemens Conventions
AI understands Siemens-specific patterns: DB access, multi-instance FBs, REGION blocks, pragma directives, and TIA Portal naming conventions.
Compiler-Verified
After writing code, the AI compiles it in TIA Portal and fixes any errors automatically. You get code that compiles on first deployment.
Context-Aware
The AI reads your existing project before generating. It reuses your UDTs, follows your naming patterns, and fits into your code architecture.
AI Code Generation vs Manual Coding
Side-by-side comparison for common PLC programming tasks
| Task | Manual Coding | AI + T-IA Connect |
|---|---|---|
| Simple FB (motor control) | 30-60 minutes | 30 seconds |
| Complex FB (state machine) | 2-4 hours | 2-5 minutes |
| IO List → PLC Tags (200 signals) | 1-2 hours | 10 seconds |
| Document 10 undocumented FBs | Half day | 5 minutes |
| Create 15 UDTs from spec | 1-2 hours | 1 minute |
| Refactor legacy LAD → SCL | Days | 15-30 minutes |
Best AI Models for PLC Code
T-IA Connect works with any AI — here's what we recommend
Claude Opus / Sonnet
Best overall for complex SCL. Deep understanding of industrial logic, safety patterns, and structured code generation. Recommended for production use.
GPT-4o
Strong for general PLC tasks and documentation. Good at following specific coding standards and generating well-commented code.
Qwen 2.5 Coder (Local)
Best local model for code generation. Run offline via Ollama for air-gapped environments. 32B version handles complex FBs well.
Frequently Asked Questions
Can AI really generate production-ready PLC code?
Yes, with the right setup. T-IA Connect gives the AI full context of your TIA Portal project — existing blocks, UDTs, tags, and naming conventions. With Claude or GPT-4o, the generated SCL code compiles and runs correctly. However, you should always review safety-critical code before deployment, just as you would review code from a colleague.
What programming languages does the AI generate?
The AI primarily generates SCL (Structured Control Language / Structured Text). This is the most versatile IEC 61131-3 language and the best fit for AI generation. T-IA Connect handles the creation of blocks in TIA Portal regardless of the source language.
Is the generated code safe for industrial use?
AI-generated code should be treated like code from a junior engineer: technically correct but requiring review. For standard automation tasks (motor control, valve sequences, data handling), the code is production-ready. For safety-critical applications (F-CPUs, emergency stops), always validate through your standard safety review process.
How does this compare to Siemens Industrial Copilot?
T-IA Connect is more flexible: it works with any AI model (not just Siemens'), supports TIA Portal V17-V21 (not just V20+), runs on-premise, and uses a one-time license instead of a SaaS subscription. The AI code generation quality depends on the model you choose — Claude and GPT-4o typically match or exceed Siemens Copilot.