Attention

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

Standard Library

IronPLC provides the standard functions and function blocks defined by IEC 61131-3. These are available in all programming languages.

Functions

Function	Description	Status
ABS	Absolute value	Not yet supported
SQRT	Square root	Not yet supported
LN	Natural logarithm	Not yet supported
LOG	Base-10 logarithm	Not yet supported
EXP	Natural exponential	Not yet supported
EXPT	Exponentiation	Supported (INT)
SIN	Sine	Not yet supported
COS	Cosine	Not yet supported
TAN	Tangent	Not yet supported
ASIN	Arc sine	Not yet supported
ACOS	Arc cosine	Not yet supported
ATAN	Arc tangent	Not yet supported
ADD	Addition	Supported (INT)
SUB	Subtraction	Supported (INT)
MUL	Multiplication	Supported (INT)
DIV	Division	Supported (INT)
MOD	Modulo	Supported (INT)
GT	Greater than	Supported (INT)
GE	Greater than or equal	Supported (INT)
EQ	Equal	Supported (INT)
LE	Less than or equal	Supported (INT)
LT	Less than	Supported (INT)
NE	Not equal	Supported (INT)
SEL	Binary selection	Not yet supported
MAX	Maximum	Not yet supported
MIN	Minimum	Not yet supported
LIMIT	Clamp to range	Not yet supported
MUX	Multiplexer	Not yet supported
SHL	Shift left	Not yet supported
SHR	Shift right	Not yet supported
ROL	Rotate left	Not yet supported
ROR	Rotate right	Not yet supported
LEN	String length	Not yet supported
LEFT	Left substring	Not yet supported
RIGHT	Right substring	Not yet supported
MID	Middle substring	Not yet supported
CONCAT	String concatenation	Not yet supported
INSERT	String insertion	Not yet supported
DELETE	String deletion	Not yet supported
REPLACE	String replacement	Not yet supported
FIND	String search	Not yet supported
Type conversions	Type conversion functions	Not yet supported

Function Blocks

Function Block	Description	Status
TON	On-delay timer	Not yet supported
TOF	Off-delay timer	Not yet supported
TP	Pulse timer	Not yet supported
CTU	Count up	Not yet supported
CTD	Count down	Not yet supported
CTUD	Count up/down	Not yet supported
R_TRIG	Rising edge detection	Not yet supported
F_TRIG	Falling edge detection	Not yet supported
SR	Set/reset flip-flop	Not yet supported
RS	Reset/set flip-flop	Not yet supported