
1/03 UDC 6300 Process Controller Product Manual 107
4.9 Input 1 Through 4 Parameters Set Up Group, Continued
Table 4-8 Input 1 through 4 Group definitions, continued
Lower Display
Prompt
Upper Display
Range of Setting
or Selection
Parameter
Definition
INn LO
(n = 1, 2, 3, or 4)
–999 to 9999
in Engineering units
INPUT n LOW RANGE VALUE in engineering units.
Available only if Linear or Square Root transmitter
characterization is selected. Scale the #1 input
signal to the display value you want for 0%. See
example on previous page. The control setpoint for
Input 1 will be limited by the range of units selected
here.
RATIO n
(n = 1, 2, 3, or 4)
–20.00 to 20.00
RATIO ON INPUT n - select the Ratio value you
want on the input designated
BIAS INn
(n = 1, 2, 3, or 4)
–999 to 9999
BIAS ON INPUT n - Bias is used to compensate the
input for drift of an input value due to deterioration of
a sensor, or some other cause.
Select the bias value you want on the input
designated.
FILTER n
(n = 1, 2, 3, or 4)
0 to 120 seconds
No filter = 0
FILTER FOR INPUT n - A software digital filter is
provided for the Input designated to smooth the input
signal. You can configure the first order lag time
constant from 1 to 120 seconds. If you do not want
filtering, enter 0.
DEADTIME3
(INPUT 3 ONLY)
0.0 TO 60.0 Minutes
DEADTIME FOR INPUT 3 - The third input can be
configured to introduce a selectable Deadtime into
the control algorithm.
Deadtime is the delay in response to any change to
Analog Input 3. Specifically, Deadtime is the interval
of time between the initiation of a change to Analog
Input 3 and the start of the resulting response and
displayed value of Input 3.
Loops using this feature should always use a loop
sample rate of 3X per second.
The controller calculates a ramp between sample
points and uses that ramp to calculate the input for
intermediate points between samples.
The controller will save a total of 540 sample points
for the Deadtime calculations.
For example:
Assume a Deadtime of 34.0 minutes. This has a
sample rate of 4.000 seconds. Now, assume that
sample #1 was 50.0, and sample #2, four seconds
after sample #1, was 74.0. The controller
calculates a ramp of +24.0 over 4.000 seconds.
This means that the controller will perform as if the
input changes at
+24.0
4.000 x 3
or +2.000 per 0.333 seconds.
Deadtime can be configured to any value between
0.0 and 60.00 minutes.
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