Rockwell-automation DeviceLogix System User Manual Manuel d'utilisateur Page 46

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46 Publication RA-UM003B-EN-P - February 2010
Chapter 2 Navigate the Function Block Editor Interface
Compute/Math Category
The Compute/Math category includes fundamental arithmetic
operations, including the instructions types:
•Add (ADD)
•Multiply (MUL)
Subtract (SUB)
Divide (DIV)
Modulus (DINT)
Modulus (REAL)
Absolute (ABS)
Negative (NEG)
Square Root (SQR)
Power (XPY)
Operation rules
The conditions and outputs of each function block are described
below.
Function Block
Typ e
Output
Add (ADD) = Source A + Source B
Multiply (MUL) = Source A x Source B
Subtract (SUB) = Source A - Source B
Divide (DIV) = Source A / Source B
Modulus (DINT) = Source A - (Source A/ Source B) x Source B
Modulus (REAL) = Source A - (DINT)(Source A/ Source B) x Source B
Absolute (ABS) = Absolute value of (Source A)
Negative (NEG) = - Source A
Square Root (SQR) = Square root of (Source A) *
Power (XPY) = Source A * * Source B
* If Source A is negative, the operation takes the absolute value of the Source A before
calculating the square root and no fault is reported.
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