PD6830X Explosion-Proof Modbus Scanners
Instruction Manual
30
Factor (
FACTOR
)
Factor scaling uses a conversion factor for scaling a
number of PV register counts to a single display
count. In other words, the factor acts as a multiplier to
change Modbus PV register data units into display
engineering units.
Factor Decimal Point (
FACTR.DP
)
Enter the number of decimal point locations necessary to
enter the conversion factor.
Conversion Factor Value (
VALUE
)
Enter the conversion factor; the multiplier value that is
applied to the Modbus PV register data to convert it to
the desired display engineering units.
For example: if the PV register data is a height in
centimeters, but a height in inches is desired on the
display, a factor of 0.393701 would be entered.
(Display Value) = (Modbus Register Value) * (Factor)
Example:
(386.08 cm) * (0.393701) = (152.00 in) = (12 ft 8 in)
Note: The bottom display of the feet and inches
display models does not show decimal points. While
the decimal point may not appear, it is included on the
factor programming steps.
For example: if the PV register data is 0 to 100 in a
flowmeter, but a flow rate desired on the display is 0
to 250 GPM, a factor of 2.5 would be entered. On feet
and inches display models, there is no lower display
decimal point. Therefore, a factor decimal point of 1
place is selected, and a conversion factor value of 25
is entered.
Linear (
LINEAR
)
Linear scaling is used to convert a linear scale of PV
to display value.
Input Values 1 and 2 (
INP
)
Enter the Modbus PV register data for scaling points
1 and 2.
Display Values 1 and 2 (
DSP
)
Enter the corresponding display values for input
points 1 and 2.
For example: If a PV register contains data in terms of
tank height in feet for a 100 feet tank, the display
value can be linearly scaled for an input of 0 feet
(Input 1) displaying 0 percent (Display 1), and an
input of 100 feet (Input 2) displaying as 100 percent
(Display 2).
Not available on Modbus PVs assigned to the feet
and inches display of feet and inches display models.
Multipoint Scaling (
MP-SCAL
)
This type of scaling is only available for PV1.
Multipoint Scaling is used when multiple linear scaling
points are required, such as round horizontal tanks or
conical storage silos. Up to 32 linearization points
may be entered, with linear scaling between each
point.
Not available on Modbus PV1 if assigned to the feet
and inches display of feet and inches display model.
Number of Points (
NO PTS
)
Enter number of linearization points. The default value
is 2 points. For linear inputs requiring only 2 scale
points, use
Linear
scaling.
