User manual

Publication 1734-UM015A-EN-E - November 2009
DeviceLogix Capabilities 67
Output is Clear
END
For more information on the Comparison category, refer to the DeviceLogix
System User Manual, publication RA-UM003
.
Compute Category
The Compute category includes fundamental arithmetic operations, including
the instruction types:
• Add (ADD)
• Multiple (MUL)
• Subtract (SUB)
• Divide (DIV)
• Modulus (DINT)
• Modulus (REAL)
• Absolute (ABS)
• Negative (NEG)
• Square Root (SQR)
• Power (XPY)
Operation rules [all except Mask (MEQ)]
The conditions and outputs of each function block are described below.
Function Block
Type
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 Source A before
calculating the square root and no fault is reported.