PLC dialect compatibility

Eight learning dialect tracks, their transferable syntax and the vendor-project or firmware behavior they do not reproduce.

Run the no-account example View facts JSON

8 learning dialect tracks

The dialects teach recognizable syntax and transferable logic patterns. “Compatible” does not mean binary, project-file or firmware compatibility with a vendor engineering suite.

Learning dialect	Accepted learning style	What transfers	What is excluded
IEC 61131-3	IEC-style declarations, addresses, ladder text and Structured Text expressions	BOOL/data types, contacts, coils, timers, counters, edge blocks and common data operations	Not a conformance-certified IEC implementation and not a replacement for a target IDE/runtime.
Allen-Bradley	RSLogix-style XIC, XIO, OTE, OTL/OTU and named timer/counter blocks	Contact/coil reasoning, latch patterns, presets and I/O-style addresses	No .ACD import/export, Logix firmware, module tree, produced tags or complete instruction set.
Siemens SCL	SCL/ST-style assignments, Siemens %I/%Q/%M addresses and supported blocks	SCL syntax, symbolic variables, time literals and common logic patterns	No TIA project, OB/FB/DB lifecycle, PLCSIM firmware or hardware configuration emulation.
Mitsubishi	GX-style LD/LDI/AND/OR/OUT/SET/RST plus T/C and D-register operations	X/Y/M/D device thinking, seal-in logic, basic timers, counters and word operations	No GX Works project import, special modules, networking setup or full MELSEC instruction catalog.
Omron	CX-style LD/LD NOT/AND/OR/OUT/SET/RSET, TIM/CNT and word operations	Contact logic, channel/bit ideas, basic timer/counter and data-move patterns	No CX-One/Sysmac project import, task model, motion, EtherCAT setup or complete CJ/NX instruction set.
Schneider Unity	Unity/EcoStruxure-oriented IEC and IL-style learning syntax	IEC variables, boolean logic, timer/counter patterns and common data operations	No .STU/.ZEF import, MAST/FAST task fidelity, hardware catalog or Control Expert runtime.
Delta	DVP/WPLSoft-style LD/LDI/AND/OR/OUT/SET/RST, TMR/CNT and D-register operations	X/Y/M/D addressing, contact/coil logic and basic data instructions	No WPLSoft/ISPSoft project import, API instruction catalog, special modules or DVP firmware.
Instruction List	Legacy IEC-style stack operations such as LD/LDN, AND/OR, ST, S/R and selected blocks	Reading and migrating legacy stack-machine logic	A legacy-learning surface, not a claim that IL is a current preferred IEC language.

Vendor names describe syntax context, not affiliation

Allen-Bradley, Rockwell Automation, Siemens, Mitsubishi, Omron, Schneider Electric and Delta are the property of their respective owners. PLC Simulation Software is an independent learning product and is not an official vendor emulator or certification provider.

Choose the next tool by the job

Learn the pattern

Use this browser simulator for fast practice, feedback and cross-dialect comparison.

Build a vendor project

Move to the official vendor IDE and target-specific documentation.

Commission a machine

Validate on the intended controller, I/O, network and safety hardware under an approved procedure.

Found a mismatch?

Send the URL, facts version, expected behavior and observed behavior. Product and documentation corrections are reviewed together.

Report a correction