Attention

IronPLC can only run very simple programs. The steps described are accurate but many language features are not yet supported.

Function Blocks

Standard function blocks defined by IEC 61131-3.

Timers

Function Block	Description	Status
TON	On-delay timer	Supported
TOF	Off-delay timer	Supported
TP	Pulse timer	Supported

Counters

Function Block	Description	Status
CTU	Count up	Supported
CTD	Count down	Supported
CTUD	Count up/down	Supported

Edge Detection

Function Block	Description	Status
R_TRIG	Rising edge detection	Not yet supported
F_TRIG	Falling edge detection	Not yet supported

Bistable

Function Block	Description	Status
SR	Set-dominant flip-flop	Supported
RS	Reset-dominant flip-flop	Supported