Conversion instructions
114
Part II IEC Instructions
WORD_TO_BOOL
WORD in BOOL
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.
PLC types
Availability of WORD_TO_BOOL (see page 1333)
If the input value = 0 (16#0000), the conversion result will be = 0 (FALSE); in any
other case, it will be = 1 ( TRUE).
Data type I/O Function
WORD input input data type
BOOL output conversion result
Description
WORD_TO_BOOL converts a value of the data type WORD into a value of the data type BOOL.
Data types
Example
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.
POU header
All input and output variables used for programming this function have been declared in the POU
header.
This example uses variables. You can also use a constant for the input variable.
Body
WORD_value of the data type WORD (16-bit) is converted into a Boolean value (1-bit). The result
will be written into Boolean_value.
LD
ST
When programming with structured text, enter the following:
Boolean_value:=WORD_TO_BOOL(WORD_value);