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Page 5-27
Chapter 5 Programming
Calculations can be performed on current point values of a single point or a group of points if set in Equations.
The calculations are performed after each scan of all measured points and the results are stored until the next
point scan.
NOTE:
Moving average can be set on channels A, B, C, D E, and F.
5.6.12.1 Equation
The Equation Calculated Point Type allows the user to program an equation to calculate a value of one or
more points and/or constants.
Operators Used for Equations
- Forty operators are allowed in any one equation programmed. If the
equation does not compute, the display will read “bad operand”. The following operators are available:
P1 to PF
are used to represent Points
K1 to KF
are used to represent Constants
)
is a RIGHT Parenthesis
+
is Add
-
is Subtract
*
is Multiply
/
is Divide
^
is Fractional
**
is Raise to the Power (X
y
)
Sq
is Square Root
Ln
is Natural Logarithm
Lg
is Base Ten Logarithm
Ex
is Exponentiation (e
x
)
(
is a LEFT Parenthesis
Programming Parameters
- Once a point has been programmed as a Calculated-Equation Point Type,
the user is presented with the following parameters:
Point tag
Section 5.6.5.1
Decimal fix
Section 5.6.5.5
Set equation
Section 5.6.5.13
Eng units
Section 5.6.5.9
Alarms
Section 5.6.5.10
Chart scale
Section 5.6.5.11
Output mode
Section 5.6.5.12
5.6.12.2 High (Hi) peak
Hi peak Calculated Point Types keep track of the highest data of a given point. This data is stored until
some form of reset occurs. When the data is reset, the Hi peak point data is printed on the chart / Alarm
log along with the current time and the time the peak value occurred if the Reset print option is enabled.
Programming Parameters
- Once a point has been programmed as a Calculated-Hi peak Point Type,
the user is presented with the following parameters:
Point tag
Section 5.6.5.1
Decimal fix
Section 5.6.5.5
Basepoint
Section 5.6.5.14
Eng units
Section 5.6.5.9
Reset contrl
Section 5.6.5.15
Alarms
Section 5.6.5.10
Chart scale
Section 5.6.5.11
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