Reserved Words; Statement Syntax - Omron CX-PROGRAMMER 5.0-FUNCTION BLOCK OPERATION Operation Manual

Structured Text (ST Language) Specifications
Data Type Conversion Functions
The following data type conversion functions can be used in structured text.
Syntax
Source data type_TO_New data type (Variable name)
Example: REAL_TO_INT (C)
In this example, the data type for variable C will be changed from REAL to INT.
Data Type Combinations
The combinations of data types that can be converted are given in the following table.
(YES = Conversion possible, No = Conversion not possible)
FROM
BOOL INT
BOOL No No
INT No No
DINT No YES
LINT No YES
UINT No YES
UDINT No YES
ULINT No YES
WORD No YES
DWORD No YES
LWORD No YES
REAL No YES
No YES
LREAL
Statement Details
Assignment
Summary
The left side of the statement (variable) is substituted with the right side of the statement (equation, variable, or
constant).

Reserved Words

:=
Combination of colon (:) and equals sign (=).

Statement Syntax

Variable: = Equation, variable, or constant;
Usage
Use assignment statements for inputting values in variables. This is a basic statement for use before or within
control statements. This statement can be used for setting initial values, storing calculation results, and incre-
menting or decrementing variables.
Description
Substitutes (stores) an equation, variable, or constant for the variable.
Examples
Example 1: Substitute variable A with the result of the equation X+1.
A:=X+1;
Example 2: Substitute variable A with the value of variable B.
A:=B;
144
DINT LINT UINT
No No No
YES YES YES
No YES YES
YES No YES
YES YES No
YES YES YES
YES YES YES
YES YES YES
YES YES YES
YES YES YES
YES YES YES
YES YES YES
TO
UDINT ULINT WORD
No No No
YES YES YES
YES YES YES
YES YES YES
YES YES YES
No YES YES
YES No YES
YES YES No
YES YES YES
YES YES YES
YES YES No
YES YES No
Appendix B
DWORD LWORD REAL
No No No
YES YES YES
YES YES YES
YES YES YES
YES YES YES
YES YES YES
YES YES YES
YES YES No
No YES No
YES No No
No No No
No No YES
LREAL
No
YES
YES
YES
YES
YES
YES
No
No
No
YES
No