FB_BA_DMUX_XX

Demultiplexer function blocks exist for different variable types (BOOL, INT, LREAL, REAL, USINT, UINT, UDINT and DINT) and in different output values (4, 8, 12 and 16), but they all have the same functionality.
The function block FB_BA_DMUX_LR16 is described as an example.

The function block FB_BA_DMUX_XX outputs in the activated state (bEn= TRUE) the value at input fIn to the output fQ01..fQ16 whose number is entered at input nSel. All other outputs are set to 0 (for boolean demultiplexers to FALSE).

Example:

Inputs	Outputs
bEn = TRUE	fQ01 = 0.0
nSel = 5	fQ02 = 0.0
fIn = 32.5	fQ03 = 0.0
	fQ04 = 0.0
	fQ05 = 32.5
	fQ06 = 0.0
	fQ07 = 0.0
	fQ08 = 0.0
	fQ09 = 0.0
	fQ10 = 0.0
	fQ11 = 0.0
	fQ12 = 0.0
	fQ13 = 0.0
	fQ14 = 0.0
	fQ15 = 0.0
	fQ16 = 0.0

If the value entered at nSel is greater than the number of outputs, the value of fIn is output at the "highest" output:

Inputs	Outputs
bEn = TRUE	fQ01 = 0.0
nSel = 25	fQ02 = 0.0
fIn = 32.5	fQ03 = 0.0
	fQ04 = 0.0
	fQ05 = 0.0
	fQ06 = 0.0
	fQ07 = 0.0
	fQ08 = 0.0
	fQ09 = 0.0
	fQ10 = 0.0
	fQ11 = 0.0
	fQ12 = 0.0
	fQ13 = 0.0
	fQ14 = 0.0
	fQ15 = 0.0
	fQ16 = 32.5

If bEn = FALSE, 0.0 is output at all outputs, or FALSE for boolean demultiplexers.

Inputs

VAR_INPUT
  bEn     : BOOL;
  nSel    : UDINT;
  fIn     : LREAL;
END_VAR

Name	Type	Description
bEn	BOOL	Activation of the block function
nSel	UDINT	Number of the output fQ01...fQ16, which is to assume the value of input fIn.
fIn	LREAL	Value to be output.

Outputs

VAR_OUTPUT
  fQ01  : LREAL;
  fQ02  : LREAL;
  fQ03  : LREAL;
  fQ04  : LREAL;
  fQ05  : LREAL;
  fQ06  : LREAL;
  fQ07  : LREAL;
  fQ08  : LREAL;
  fQ09  : LREAL;
  fQ10  : LREAL;
  fQ11  : LREAL;
  fQ12  : LREAL;
  fQ13  : LREAL;
  fQ14  : LREAL;
  fQ15  : LREAL;
  fQ16  : LREAL;
END_VAR

Name	Type	Description
fQ01...fQ16	LREAL	Value outputs

Requirements

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