PD6830X Explosion-Proof Modbus Scanners
Instruction Manual
42
The available math functions are detailed below.
Math
Selection Function
Equation
SUM
Addition
PAR1 + PAR2
DIF
Difference
PAR1 - PAR2
MULTI
Multiplication PAR1 * PAR2
DIVIDE
Division
PAR1 / PAR2
DIFABS
Absolute diff. Abs(PAR1 - PAR2)
WAVG
Weighted
avg.
((PAR1 –
PAR2)*PAR3) +PAR2
DRAW
Draw
((PAR1 / PAR2) –
1) * PAR3
RATIO
Ratio
(PAR1 / PAR2) * PAR3
CONCEN
Concentration PAR1 / (PAR1 +
PAR2) * PAR3
CONST
Constant
Constant value of
0.0001 to 99999
NONE
None
Disable
ABS
Absolute
Value
Abs(PAR1)
SQRT
Square Root
√
(PAR1)
The available parameters for PAR1, PAR2, and PAR3
shown above are detailed below.
PAR
Selection
Parameter
Description
PV 1
Modbus PV1
The scaled PV1 value;
PV2 to PV16 also
selectable
CV 1
Math Channel
CV1
The math channel CV1
value; CV2 to CV4
also selectable
ABS
Nested
Absolute
Value*
Abs(L2 PAR1)
SQRT
Nested
Square Root*
√
(L2 PAR1)
SUM
Nested
Addition*
L2P1 + L2P2
DIF
Nested
Difference*
L2P1 - L2P2
MULTI
Nested
Multiplication* L2P1 * L2P2
DIVIDE
Nested
Division*
L2P1 / L2P2
DIFABS
Nested
Absolute diff.* Abs(L2P1 - L2 PAR2)
WAVG
Nested
Weighted
avg.*
((L2P1 – L2P2)* L2P3)
+ L2P2
DRAW
Nested Draw* ((L2P1 / L2P2) – 1) *
L2P3
RATIO
Nested Ratio* (L2P1 / L2P2) * L2P3
CONCEN
Nested
Concentration*
L2P1 / (L2P1 + L2P2)
* L2P3
CONST
Constant
Constant value of
0.0001 to 99999
NONE
None
No parameter.
*Selecting this math function as a parameter will enter
into the setup for a Nested Math Function. These pa-
rameters are not available for level 2 parameters used
when setting up the nested math function.
Nested Math Functions
To create more complicated math functions, the first
level parameters allow a math function to be selected
as the parameter. In this case, a second level of
parameters is selected for the nested math function.
These level 2 parameters are level 2 parameter 1,
L2P1
(
L2P1
),
level 2 parameter 2,
L2P2
(
L2P2
), level
2 parameter 3, and
L2P3
(
L2P3
). Level 2 parameters
are selected similarly to other math parameters;
however additional nested math functions are
unavailable for selection.
