FB_BA_MUX_XX
Multiplexer blocks exist for different variable types (BOOL, INT, LREAL, REAL, USINT, UINT and UDINT) and in different input parameters (5, 9, 13 and 17), but they all have the same functionality.
The function block FB_BA_MUX_LR16 is described as an example.
Functional description
The function block outputs in the activated state (bEn=TRUE) that input value lrIn00..lrIn16 at output lrQ whose number is entered at input udiSel.
Example:
Inputs | Output |
|---|---|
bEn = TRUE | lrQ = 16.5 |
udiSel = 5 |
|
lrIn00 = 15.9 |
|
lrIn01 = 32.5 |
|
lrIn02 = 17.4 |
|
lrIn03 = 5.84 |
|
lrIn04 = 9.56 |
|
lrIn05 = 16.5 |
|
lrIn06 = 32,781 |
|
lrIn07 = 25.4 |
|
lrIn08 = 44.5 |
|
lrIn09 = 66.1 |
|
lrIn10 = 45.5 |
|
lrIn11 = 83.3 |
|
lrIn12 = 54.56 |
|
lrIn13 = 33.8 |
|
lrIn14 = 98.5 |
|
lrIn15 = 71.3 |
|
lrIn16 = 2.3 |
|
If the entered value at udiSel is greater than the number of inputs, the "highest" input is output at lrQ:
Inputs | Output |
|---|---|
bEn = TRUE | lrQ = 2.3 |
udiSel = 25 |
|
lrIn00 = 15.9 |
|
lrIn01 = 32.5 |
|
lrIn02 = 17.4 |
|
lrIn03 = 5.84 |
|
lrIn04 = 9.56 |
|
lrIn05 = 16.5 |
|
lrIn06 = 32,781 |
|
lrIn07 = 25.4 |
|
lrIn08 = 44.5 |
|
lrIn09 = 66.1 |
|
lrIn10 = 45.5 |
|
lrIn11 = 83.3 |
|
lrIn12 = 54.56 |
|
lrIn13 = 33.8 |
|
lrIn14 = 98.5 |
|
lrIn15 = 71.3 |
|
lrIn16 = 2.3 |
|
If bEn=FALSE, 0.0 is output at output lrQ or FALSE for boolean multiplexers.
Inputs/outputs
VAR_INPUT
bEn : BOOL;
udiSel : UDINT;
lrIn00 : LREAL;
lrIn01 : LREAL;
lrIn02 : LREAL;
lrIn03 : LREAL;
lrIn04 : LREAL;
lrIn05 : LREAL;
lrIn06 : LREAL;
lrIn07 : LREAL;
lrIn08 : LREAL;
lrIn09 : LREAL;
lrIn10 : LREAL;
lrIn11 : LREAL;
lrIn12 : LREAL;
lrIn13 : LREAL;
lrIn14 : LREAL;
lrIn15 : LREAL;
lrIn16 : LREAL;
bEn: activation of the block function
udiSel: number of the input, whose value is to be output at lrQ.
lr00...lr16: input values to select from
VAR_OUTPUT
lrQ : UDINT;
lrQ: value of the selected input
Requirements
Development environment | Target system | required library | required supplement |
|---|---|---|---|
TwinCAT 2.11 R3/x64 | PC/CX | TcBA library from V1.0.0 | TS8040 | TwinCAT Building Automation from V1.0.0 |