plcviz

PLC code visualization tool - generate SVG diagrams from L5X (Rockwell) and PLCopen XML (IEC 61131-3) files.

Example Output

Features

• Structure graphs: Program/POU containment hierarchy
• Call graphs: Function/FB call relationships
• DataType dependency graphs: UDT nesting relationships (PLCopen)
• Multiple formats: L5X (Rockwell) and PLCopen XML (Siemens, CODESYS, Beckhoff, B&R)
• Multiple export types: Controller, Program, and AOI exports (L5X)

Supported Formats

L5X (Rockwell Automation)

• Logix5000 / Studio 5000 exports (.L5X)
• ControlLogix, CompactLogix, SoftLogix platforms

PLCopen XML (IEC 61131-3 TC6)

• Siemens TIA Portal
• CODESYS
• Beckhoff TwinCAT
• B&R Automation Studio
• Beremiz
• Any IEC 61131-3 compliant tool

Installation

cargo install --path .

Usage

# Generate structure graph (default)
plcviz project.L5X > structure.svg
plcviz project.xml > structure.svg  # PLCopen

# Generate call graph
plcviz -t call project.L5X > calls.svg

# Generate combined graph (structure + calls)
plcviz -t combined project.L5X > combined.svg

# DataType dependency graph (PLCopen only)
plcviz -t dataflow project.xml > datatypes.svg

# Include AOIs in the graph (L5X only)
plcviz -a project.L5X > with_aois.svg

# Generate example graph (no file needed)
plcviz example > example.svg

Graph Types

Supported Export Types

L5X

• Controller: Full project exports (multiple programs)
• Program: Single program exports
• AddOnInstructionDefinition: AOI exports with internal routines

PLCopen

• Project: Full project with POUs (programs, functions, function blocks)
• DataTypes: User-defined types and structures

Format Detection

plcviz automatically detects the file format:

• PLCopen: Detected by <project xmlns="http://www.plcopen.org/xml/tc6...">
• L5X: All other XML files

License

MIT