SEL / SEL_S - Selection of input

Depending on the value of the C (condition) input, this function selects one of its two inputs AT or AF and applies the related value to the SEL output.

If C = FALSE, the value at AF is applied at the SEL output. If C = TRUE, the value at AT is applied at the output OUT as shown in the following function table:

C input	AT input	AF input	SEL/SEL_S output
TRUE	Value AT	Value AF	Value AT
FALSE	Value AT	Value AF	Value AF

NOTE:

Although the SEL function supports all elementary data types that are available in the EcoStruxure Machine Expert - Safety, the inputs AT and AF as well as the SEL output must be connected to the same data type.

SEL

Parameter	Data types	Description
C	BOOL	Condition which input is to be applied to the SEL output
AT	ANY_ELEMENTARY	Value at the input is applied to the SEL output if C = TRUE
AF	ANY_ELEMENTARY	Value at the input is applied to the SEL output if C = FALSE
SEL	ANY_ELEMENTARY	Value at AT or AF, depending on C

SEL_S

Parameter	Data types	Description
C	SAFEBOOL	Condition which input is to be applied to the SEL output
AT	ANY_SAFEELEMENTARY	Value at the input is applied to the SEL output if C = TRUE
AF	ANY_SAFEELEMENTARY	Value at the input is applied to the SEL output if C = FALSE
SEL	ANY_SAFEELEMENTARY	Value at AT or AF, depending on C