Attention

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

EQ

Returns TRUE if two inputs are equal.

IEC 61131-3	Section 2.5.1.5.4
Support	Supported

Signatures

#	Input (IN1)	Input (IN2)	Return Type	Support
1	SINT	SINT	BOOL	Supported
2	INT	INT	BOOL	Supported
3	DINT	DINT	BOOL	Supported
4	LINT	LINT	BOOL	Supported
5	USINT	USINT	BOOL	Supported
6	UINT	UINT	BOOL	Supported
7	UDINT	UDINT	BOOL	Supported
8	ULINT	ULINT	BOOL	Supported
9	REAL	REAL	BOOL	Supported
10	LREAL	LREAL	BOOL	Supported

Description

Returns TRUE if IN1 is equal to IN2, FALSE otherwise. EQ(a, b) is the functional form of the = operator: a = b. Both forms are equivalent.

For REAL and LREAL types, equality comparison is subject to floating-point precision limitations.

Example

result := EQ(5, 5);     (* result = TRUE *)
result := 5 = 5;        (* result = TRUE, operator form *)
result := 5 = 10;       (* result = FALSE *)

See Also

• NE — not equal

• GT — greater than

• LT — less than