
1/03 UDC 6300 Process Controller Product Manual 87
4.6 Algorithm Data Set Up Group, Continued
Table 4-5 Algorithm Group Definitions, continued
Lower Display
Prompt
Upper Display
Range of Setting
or Selection
Parameter
Definition
OUTOVRD
continued
LO SELECT
LOW SELECT - The controller will select the lower
of output 1 or output 2 and direct it to output 1 rear
terminals.
ATTENTION
The unselected output will track the
selected output within 5% to eliminate windup in the
unselected direction.
INPUT MATH ALGORITHMS - The controller is provided with two input algorithms. Each algorithm can
be configured to provide a derived (calculated) PV or a derived Remote setpoint. Up to three inputs may
be applied to the calculation. In addition, the 2 algorithms may be "linked" to combine two calculations by
configuring one algorithm to be an input to the other algorithm. See Input A, B, and C for definitions per
equation. All algorithms operate in Engineering Units except Feedforward which operates in percent of
range units. The Pulse input is calculated in percent of full scale.
IN ALG 1
INPUT ALGORITHM 1 has the following selections
from which to choose:
NONE
NONE - No algorithm configured
WTD AVG
WEIGHTED AVERAGE - When you configure for
Weighted Average, the controller will compute a PV
or SP for the control algorithm from the following
equation:
PV or SP =
(1 + K)
(Input A x Ratio A + Bias A) + K(Input B x Ratio B + Bias B)
Both Inputs must have the same range in
engineering units.
FFWD SUM
FEEDFORWARD SUMMER - Feedforward uses
Input A, following a Ratio and Bias calculation as a
value summed directly with the PID computed output
value and sent, as an output value, to the final
control element. Applies to Loop 1 only.
This algorithm will only function in automatic mode.
The following formula applies:
Controller Output = PID Output + (Input A x Ratio A + BiasA )
Table 4-5 continued on next page
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