Panasonic FP Series Programming Manual page 259

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Selection instructions

With the first input variable (data type BOOL) of SEL you define which input variable is to be written

into the output variable. If the Boolean value = 0 (FALSE), the input variable IN0 will be written into

the output variable, otherwise IN1.

To add an enable input and enable output to the instruction, select [With EN/ENO] from the

"Instructions" pane (LD, FBD or IL editor). To reuse an instruction select "Recently used" from the

context menu or press <Ctrl>+<Shift>+<v> in the programming window.

Availability of SEL (see page 1330)

 When using the data type STRING with small PLCs like FP-e or FP0,

make sure that the length of the result string is equal to or greater than

the length of the source string.

 For further information refer to the online help: Upgrade Problems with

Data Type STRING

 The difference between the functions SEL and MUX (see page 255) is

that in case of SEL a Boolean value serves for the channel selection,

and in case of MUX an integral number (INT). Therefore, you can

choose between more than two channels with MUX.

all data types

In this example, the same POU header is used for all programming languages. For an example

using IL (instruction list), please refer to the online help.

All input and output variables which are required for programming the function are declared in the

In this example the input variables (channel_select, channel_0 and channel_1) have been

declared. Instead, you may enter a constant directly at the input contact of a function.

If channel_select has the value 0, channel_0 will be written into output, otherwise channel_1.

Select value from one of two channels

selects between input value IN0 or IN1

value is written into the output variable if G = FALSE

value is written into the output variable if G = TRUE

result value as IN0 or IN1