WattMaster WCC II - Manual (Page 107)

Section 3: Screen Descriptions
WCC II Operator’s Guide
Operator Interfaces 3-75
Global Value = ((2A5-2A6)/(2A5-GA3))*100
The math formula to be calculated is entered here. The ECC/WCC
II system has the following math functions:
Arithmetic Functions
Operator Comment
Add + Adds the value at its right to the value at
its left
Subtract - Subtracts the value at its right from the
value at its left
Multiply * Multiples the value at its right by the value
at its left
Divide / Divides the value at its left by the value at
its right
Square Root sqrt(X) Yields the square root of the value in the
parentheses
Log (Base
10) log(X) Yields the log of the value in the
parentheses
Exponential
(X
y )
pow(X,Y) Yields the value of the fi rst variable (X) raised
to the power of the second variable (Y)
Natural Log 1n(X) Yields the natural log of the variable in the
parentheses
Exponential
(e
x )
exp(X) Yields the value of “e” raised to the power
of the variable in parentheses
Remainder % Yields the remainder when the value at
its left is divided by the value to its right
(integers only)
Trigonometric Functions
Operator Comment
Sine sin(X) Yields the sine of the value in
parentheses
Cosine cos(X) Yields the cosine of the value in
parentheses
Tangent tan(X) Yields the tangent of the value in
parentheses
Arc-sine asin(X) Yields the arc-sine of the value in
parentheses
Arc-cosine acos(X) Yields the arc-cosine of the value in
parentheses
Arc-Tangent atan(X) Yields the arc-tangent of the value in
parentheses
ANALOG GLOBAL - MATH FUNCTION MODE
The Math Function mode allows the ECC/WCC II system to perform mathematical functions using global analog values.
MATH FUNCTION SCREEN
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ANALOG Global #: 33 Name is GA33
Description: % Outside Air Data Pattern: x,xxx
Unit of Measure: 6%
In Local Set this global defaults to LAST VALUE
Mode 4: Math Function
Global Value = ((2A5-2A6)/(2A5-GA3))*100
If the math function can’t be calculated successfully, use 20 as value.
---------------Alarm---------------
Range Low Limit High Limit Type Message # Message
None
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