Xylem System 5000 User Manual - Manual (Page 26)

MANAGING TASKS
24
More complex mathematical operations
can be performed through use of
Custom Functions. Custom Functions
can not only utilize advanced arithmetic
operators, but also other Task values in
their calculations. The Custom Function
screen is accessed by first pressing the
radio button next to the Custom Function
option, then pressing the Edit button next
to the existing Custom Function on the
Math & Data Options page.
Using Custom Functions
The Custom Function screen has three
buttons that provide access to extended
operations: Operators, Functions, and
Created Tasks. The existing custom
function will be listed in the top area,
where an Evaluate button can be used to
test the function itself.
Built-in operators provide the base for
arithmetic and logical equations. They are
of lower precedence than built-in functions
and can be accessed by pressing the
Operators button.
Operators
x^y: x raised to the power of y, 3^5 = 243
Powers
x * y: x multiplied by y, 20 * 30 = 600
x / y: x divided by y, 20 / 30 = 0.666667
Multiplication / Division
x + y: x added to y, 20 + 30 = 50
x - y: x subtract y, 20 - 30 = -10
Addition / Subtraction