FB_BA_MUX_XX

Multiplexer function blocks exist for different variable types (BOOL, INT, LREAL, REAL, USINT, UINT, UDINT and DINT) and in different input values (4, 8, 12 and 16), but they all have the same functionality.
The function block FB_BA_MUX_LR16 is described as an example.

The function block FB_BA_MUX_XX outputs in the activated state (bEn=TRUE) that input value fIn01..fIn16 at output fQ whose number is entered at input nSel.
Example:

Inputs	Output
bEn = TRUE	fQ = 16.5
nSel = 5
fIn01 = 15.9
fIn02 = 32.5
fIn03 = 17.4
fIn04 = 5.84
fIn05 = 9.56
fIn06 = 16.5
fIn07 = 32,781
fIn08 = 25.4
fIn09 = 44.5
fIn10 = 66.1
fIn11 = 45.5
fIn12 = 83.3
fIn13 = 54.56
fIn14 = 33.8
fIn15 = 98.5
fIn16 = 71.3

If the entered value at nSel is greater than the number of inputs, the "highest" input is output at fQ:

Inputs	Output
bEn = TRUE	fQ = 2.3
nSel = 25
fIn01 = 15.9
fIn02 = 32.5
fIn03 = 17.4
fIn04 = 5.84
fIn05 = 9.56
fIn06 = 16.5
fIn07 = 32,781
fIn08 = 25.4
fIn09 = 44.5
fIn10 = 66.1
fIn11 = 45.5
fIn12 = 83.3
fIn13 = 54.56
fIn14 = 33.8
fIn15 = 98.5
fIn16 = 71.3

If bEn=FALSE, 0.0 is output at output fQ or FALSE for boolean multiplexers.

Inputs

VAR_INPUT
  bEn    : BOOL;
  nSel   : UDINT;
  fIn01  : LREAL;
  fIn02  : LREAL;
  fIn03  : LREAL;
  fIn04  : LREAL;
  fIn05  : LREAL;
  fIn06  : LREAL;
  fIn07  : LREAL;
  fIn08  : LREAL;
  fIn09  : LREAL;
  fIn10  : LREAL;
  fIn11  : LREAL;
  fIn12  : LREAL;
  fIn13  : LREAL;
  fIn14  : LREAL;
  fIn15  : LREAL;
  fIn16  : LREAL;
END_VAR

Name	Type	Description
bEn	BOOL	Activation of the block function
nSel	UDINT	Number of the input, whose value is to be output at fQ.
f01...f16	LREAL	Input values to select from.

Outputs

VAR_OUTPUT
  fQ   : LREAL;
END_VAR

Name	Type	Description
fQ	LREAL	Value of the selected input.

Requirements

Development environment	Required PLC library
TwinCAT from v3.1.4024.22	Tc3_BA2 from v5.2.5.0