Newborn 
C# MCP server for Siemens TIA Portal
HEALTH ? 92 / Healthy
Newborn C# // readme
TiaMcp
MCP server for Siemens TIA Portal V21+ projects — reads and writes directly to TIA Portal via the Openness API, designed for a fast, LLM- and human-friendly workflow.
Special features that make TiaMcp fast for LLM’s and human-readable friendly:
- STL is read/written as text AWL
- PLC tables are converted to/from Excel-compatible CSV
- HMI tables are converted to/from Excel-compatible CSV
- HMI alarms are converted to/from Excel-compatible CSV
- GRAPH is converted to/from compact text DSL (Domain Specific Language)
Format reference
| Format / Language | File extension(s) | Read | Write |
|---|---|---|---|
| SCL | .s7dcl / .s7res | Yes | Yes |
| FBD | .s7dcl / .s7res | Yes | Yes |
| LAD | .s7dcl / .s7res | Yes | Yes |
Global DB (DATA_BLOCK) | .s7dcl / .s7res | Yes | Yes |
| GRAPH (S7-GRAPH/SFC) | .graph.il | Yes | Partial |
| Instance-DB | .s7dcl + read-only .interface.txt (resolved member list) | Yes | Create-only |
| STL (whole-block) | .awl | Yes | Yes |
| STL (embedded in mixed FBD/LAD/SCL block) | .stl-networks.awl (or .stl-networks.xml fallback) + .s7dcl/.s7res | Yes | Through .xml only |
| UDT (PLC data type) | .s7dcl /… |