Introduction
Analog Inputs
The UDC3200 has two analog inputs with a typical accuracy of ±0.20% of full-scale
input and a typical resolution of 16 bits. Both analog inputs are sampled six times per
second (every 166 ms).
The first, or Process Variable input, can be one of the various thermocouple, RTD,
Radiamatic or linear actuations. Linear actuations have thermocouple, RTD, and
Radiamatic transmitter characterization capability as a standard feature. Linear actuations
also have square root capability.
The optional second input is isolated and accepts the same actuations as input one, or it
provides the Slidewire input for Position Proportional control.
All actuations and characterizations are keyboard configurable. Cold junction
compensation is provided for thermocouple type inputs. Upscale, downscale or failsafe
sensor break protection is keyboard configurable. A configurable digital filter of 0 to 120
seconds provides input signal damping.
Thermocouple Health - In addition to the standard configurable upscale, downscale or
failsafe output burnout selections, the condition of the thermocouple can be monitored to
determine if it is good, failing or in danger of imminent failure.
Math Functions
Algorithm—A pre-configured algorithm is available for easy implementation. This
includes the capability of using a Ratio and Bias with any input. You can select from the
following menu:
Feedforward Summer—Uses either input, followed by a Ratio/Bias calculation,
summed directly with the computed PID output value to provide a resultant output to
the final control element (standard feature).
Weighted Average —Computes the weighted average of a PV or SP for the control
algorithm from two inputs (standard feature).
Feedforward Multiplier—Uses any input, multiplied by the calculated PID output to
provide a resultant output which is sent to the final control element (standard feature).
Summer/Subtractor—Will add or subtract inputs with the result used as the derived PV.
Multiplier/Divider—Uses the analog inputs to calculate a derived PV. Available with
or without Square Root.
Input High/Low Select—Specifies the PV input as the higher or lower of the two inputs.
Digital Inputs
Two isolated digital inputs are provided for remote dry contact closure to select one of
25 actions. Also, the digital inputs can allow one of six selections to be combined with
one of the above selections.
2 UDC3200 Universal Digital Controller Product Manual 12/04
To Next Page
Loading...
