SELU – Controller selector unit

Block SymbolLicensing group: STANDARD

Function Description
The SELU block is tailored for selecting the active controller in selector control. It chooses one of the input signals u1, u2, u3, u4 and copies it to the output y. For $BINF = off$ the active signal is selected by the iSW input. In the case of $BINF = on$ the selection is based on the binary inputs SW1 and SW2 according to the following table:


iSW	SW1	SW2	y	U1	U2	U3	U4

0	off	off	u1	off	on	on	on
1	off	on	u2	on	off	on	on
2	on	off	u3	on	on	off	on
3	on	on	u4	on	on	on	off

This table also explains the meaning of the binary outputs U1, U2, U3 and U4, which are used by the inactive controllers in selector control for tracking purposes (via the SWU blocks).

Inputs

u1..u4	Signals to be selected from	Double (F64)
iSW	Active signal selector in case of $BINF = off$	Long (I32)
SW1	Binary signal selector, used when $BINF = on$	Bool
SW2	Binary signal selector, used when $BINF = on$	Bool

Outputs

y	Analog output of the block	Double (F64)
U1..U4	Binary output signal for selector control	Bool

Parameter

BINF

Enable the binary selectors

Bool

off ..: Disabled (analog selector)
on ...: Enabled (binary selectors)

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iSW	SW1	SW2	y	U1	U2	U3	U4

0	off	off	u1	off	on	on	on
1	off	on	u2	on	off	on	on
2	on	off	u3	on	on	off	on
3	on	on	u4	on	on	on	off


iSW	SW1	SW2	y	U1	U2	U3	U4

0	off	off	u1	off	on	on	on
1	off	on	u2	on	off	on	on
2	on	off	u3	on	on	off	on
3	on	on	u4	on	on	on	off


iSW	SW1	SW2	y	U1	U2	U3	U4

0	off	off	u1	off	on	on	on
1	off	on	u2	on	off	on	on
2	on	off	u3	on	on	off	on
3	on	on	u4	on	on	on	off