58
BLOCK TO CONFIGURE
M
NONE
MATHS BLOCK
CONFIGURATION
MATHS M FUNCTION
FVAlUE
RH
MASS FLOW
(axb)+c
(a-b)/c
(a+b)/c
(axb)/c
(a+b+c)/3
(a+b+c)
LOW SELECT
MED SELECT
HIGH SELECT
OFF
MATHS M ENGINEERING
RANGE FS
OFF
MATHS M ENGINEERING
RANGE DECPT
General Formulæ
NONE
…6
CONFIGURATION – ADVANCED LEVEL
6.2
Advanced Level – Math Functions
6.2.1
Math Block Configuration Page
Information.
• 4 programmable math blocks.
• Each math block can be configured for any of the 13 math functions, i.e. Fvalue, relative humidity, mass flow (2) arithmetic
(6) or signal select (3).
• Programmable engineering units and result tag for each block.
Note
. The
Math Block Configuration Page
is separated into three types of configuration depending on the function selected.
In each case, after selecting the function required, the display parameters, engineering units and result tag are set.
Block to Configure
Select the math block to configure (M1 to M4) On entry the default is
NONE
.
Math Function
Select the math function required:
FVALUE
–
Fvalue calculation
RH
–
Relative Humidity calculation
MASS FLOW 2
–
Calculation of mass flow from differential pressure
MASS FLOW 1
–
Calculation of mass flow from volume flow
(axb)+c
–
Equivalent to straight line equation y=mx+c
(a
–
b)/c
–
(a+b)/c
–
Simple arithmetic
(axb)/c
–
(a+b+c)/3
–
Averaging
(a+b+c)
–
Addition
LOW SELECT
–
Output follows lowest of three inputs
MED SELECT
–
Output follows median of three inputs
HIGH SELECT
–
Output follows highest of three inputs
OFF
–
Sets math function to
OFF
.
Math Result Engineering Range Full Scale
Set the display value which represents the maximum result value, between
–999 and +9999.
Math Result Engineering Range Decimal Point
Set the number of decimal places required for both the display full scale and
display zero values.
Continued on next page.
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