Compare IEC 61131-3, Allen-Bradley, Siemens SCL, Mitsubishi, Omron, KEYENCE KV, Schneider Unity, Delta, Instruction List in a runnable learning environment. Each track teaches transferable syntax and logic patterns; none claims to replace the vendor IDE, controller firmware, or hardware test.
Every code sample below comes from the same validated seal-in program used by the cross-dialect test suite. The scope is intentionally explicit: educational interpreters for the listed syntax subsets, not complete vendor emulators.
Vendor-neutral foundation
The international PLC-language standard and the clearest starting point for reusable control logic. The tutor covers ladder-oriented expressions, declarations, function blocks, timers, counters, latches, arithmetic, and common edge patterns.
VAR
START AT %I0.0 : BOOL;
STOP AT %I0.1 : BOOL;
MOTOR AT %Q0.0 : BOOL;
END_VAR
| START OR MOTOR AND /STOP | := MOTOR ;Rockwell Automation · Studio 5000-style learning syntax
Practise the tag-based XIC, XIO, OTE, OTL, OTU, TON, and CTU patterns found throughout North American manufacturing. It teaches transferable Logix-style reasoning; it does not open ACD files or emulate a ControlLogix processor.
TAG START I:0/0 BOOL
TAG STOP I:0/1 BOOL
TAG MOTOR O:0/0 BOOL
XIC START OR XIC MOTOR AND XIO STOP OTE MOTORSiemens · STEP 7 and TIA Portal-style learning syntax
Learn Siemens-oriented boolean, latch, timer, counter, and data patterns with familiar A, AN, O, S, R, and assignment forms. This is a curriculum interpreter, not PLCSIM or an S7 firmware emulator.
VAR
START AT %I0.0 : BOOL;
STOP AT %I0.1 : BOOL;
MOTOR AT %Q0.0 : BOOL;
END_VAR
A START
O MOTOR
AN STOP
= MOTORMitsubishi Electric · GX Works / MELSEC-style mnemonics
Use LD, ANI, OR, OUT, SET, and RST with Mitsubishi-oriented device and symbolic naming. The supported subset is designed for core logic practice, not native GX Works project files or complete instruction coverage.
VAR
START AT %I0.0 : BOOL;
STOP AT %I0.1 : BOOL;
MOTOR AT %Q0.0 : BOOL;
END_VAR
LD START
OR MOTOR
ANI STOP
OUT MOTOROmron · CX-Programmer / Sysmac-style learning syntax
Practise the boolean, latch, timer, and counter forms used in packaging and machine automation. The interpreter focuses on the curriculum subset and transferable logic rather than full CX or Sysmac runtime fidelity.
VAR
START AT %I0.0 : BOOL;
STOP AT %I0.1 : BOOL;
MOTOR AT %Q0.0 : BOOL;
END_VAR
LD START
OR MOTOR
AND NOT STOP
OUT MOTORKEYENCE · KV STUDIO-style mnemonic learning syntax
Practise KV relay and data-memory addressing with R, MR, DM, T, and C devices plus LD, LDB, ANB, OUT, SET, RES, timers, counters, and arithmetic. This tested subset is for learning; it does not open KV STUDIO projects or emulate KV firmware.
VAR
START AT %I0.0 : BOOL;
STOP AT %I0.1 : BOOL;
MOTOR AT %Q0.0 : BOOL;
END_VAR
LD R000
OR R500
ANB R001
OUT R500Schneider Electric · Unity Pro / Control Expert-style learning syntax
A Schneider-oriented track for the IEC-style logic used around Modicon controllers. It covers the runnable curriculum subset and common control patterns; it is not a Unity or Control Expert replacement.
VAR
START AT %I0.0 : BOOL;
STOP AT %I0.1 : BOOL;
MOTOR AT %Q0.0 : BOOL;
END_VAR
LD START
OR MOTOR
ANDN STOP
ST MOTORDelta Electronics · WPLSoft / ISPSoft-style mnemonics
Work with DVP-oriented X, Y, M, T, C, and D devices plus LD, LDI, ANI, OR, OUT, SET, RST, TMR, CNT, and core math operations. Address translation and acceptance tests run in the browser.
LD X0
OR Y0
ANI X1
OUT Y0IEC 61131-3 legacy language · vendor-neutral track
Instruction List was deprecated in IEC 61131-3 third edition, but it remains valuable for installed equipment. This track teaches accumulator-style LD, AND, OR, ST, set/reset, timer, and counter patterns.
VAR
START AT %I0.0 : BOOL;
STOP AT %I0.1 : BOOL;
MOTOR AT %Q0.0 : BOOL;
END_VAR
LD START
OR MOTOR
ANDN STOP
ST MOTORThe first 6 core lessons per dialect are free. Pro adds the complete curriculum, worked solutions, and the full supported learning set.