Installation manual

Display Parameters
900M050U00  Athena Controls, Inc. 6-3
6.2 Configuring Display Parameters for RTD and
Thermocouple Input Types
6.2.1 Choosing the Decimal Position When a Temperature 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.
The only exception is when the input type is rt.drt.d (100 ohm compressed RTD with
decimal support). In this case, the decimal position is always 1, and the deC.PdeC.P parameter
is not displayed.
Parameter Name
: Decimal Position (B6)
Name as Displayed:
dEC.PdEC.P
Used By:
all controllers
When Displayed:
always (unless the input type is rt.drt.d)
Choices:
0 and 1
Default:
0
Description:
In the case of a controller using a temperature input, this
parameter is used to choose the maximum quantity of digits to
the right of the decimal point on the display, and in the PV and
SV values used in the controller’s calculations. No decimal
position will be displayed if necessary to accommodate the four-
character display.
6.2.2 Specifying the Display Filter When a Temperature 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.