Installation manual

Display Parameters
900M050U00  Athena Controls, Inc. 6-5
6.3 Configuring Display Parameters for Linear Input Types
6.3.1 Choosing the Decimal Position When a Linear Input Is Used
The decimal point location applies to all controller types, including the 1ZC model. Even
though the 1ZC has no display, you must configure the decimal position parameter (or
accept the default) because the controller uses this parameter value to determine how
many decimal places to store for the PV and SV values.
Parameter Name
: Decimal Position (B7)
Name as Displayed:
dEC.PdEC.P
Used By:
all controllers
When Displayed:
always
Choices:
0, 1, 2, 3
Default:
0
Description:
In the case of a controller using a linear input, this parameter is
used to choose the quantity of digits always displayed to the
right of the decimal point on the display, and in the PV and SV
values used in the controller’s calculations. If the controller uses
a linear input and the dEC.pdEC.p parameter is not set to 0 (zero), the
number of decimal places specified is always imposed on the
parameter’s value. This has the effect of reducing the range of
valid values for many parameters when a linear input is used.
See 4.3.2 for information about this effect of a linear input on
parameter ranges when a non-zero decimal position is used.
6.3.2 Specifying the Display Filter When a Linear Input Is Used
Unlike the input filter, the value entered for the display filter has no effect on control. The
input filter slows the rate at which the displayed PV is changed. The display filter is
generally used when at least one decimal place is displayed.
Parameter Name:
Display Filter (B8)
Name as Displayed
:
d.FILd.FIL
Used By:
all except 1ZC
When Displayed:
always
Range:
0.1 to 10.0 seconds (See Note 1 below.)
Default:
0.1
Description:
Used to specify the minimum time period between changes of
the displayed PV value.
Note 1: The range of valid values for this parameter always includes tenths values,
regardless of the deC.PdeC.P (decimal position) setting.