Topic: DMD0129

TOINT - Convert to Integer
This instruction can only be used in the Expression parameter of the Calculate Expression (MATH) instruction.

 

The Convert to Integer (TOINT) function will convert the input real number to an integer. The value will not be rounded. The range of acceptable input values is any positive or negative real number.

 

 

Note: Use the F9 key or click the 'three dot box' at the right edge of the parameter field to open the Default Element Selection Tool (the Element Picker or the Element Browser) or use the Down-Arrow key (Auto-Complete) on any parameter field to see a complete list of the memory locations that are valid for that parameter of the instruction.

 

Result specifies a location to store the result of the calculation. This can be any writable numeric location.

 

The Expression parameter consists of all the text between the bounding parentheses.Any expression parameter can be a constant value, a bit or numeric memory location, an arithmetic expression, and/or mathematical function or other expressions up to a maximum of 1024 characters. Expressions can be nested, so use of parentheses is recommended to ensure proper evaluation order.

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Using the Math box example above:

 

  • If R0 = 3.14159 the result in D0 would be 3

     

  • If R0 = -3.14159 the result in D0 would be -3

 

To force integer math calculations on subsequent math operations to use integer math, demote the real expression to it's 32-bit 2's complement integer equivalent. For information on promotion and demotion see the help topic for the MATH - Calculate Expression instruction.

 

Use the ROUND() function to round the result of the expression to the nearest value instead of truncating the value.

 

See Also:

 

Related Topics:

 

Rung Example: