Honeywell UDC2800 User Manual

15
Math Function
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:
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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).
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Weighted Average —Computes the weighted average of a PV or SP
for the control algorithm from two inputs (standard feature).
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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).
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Summer/Subtractor—Will add or subtract inputs with the result
used as the derived PV.
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Multiplier/Divider—Uses the analog inputs to calculate a derived
PV. Available with or without Square Root.
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Input High/Low Select—Specifies the PV input as the higher or
lower of the two inputs.
Digital Inputs
Two¹ isolated digital inputs are provided for remote dry contact
closure to select one of the following actions.
Note 1: The second Current Output and the second Digital Input are
mutually exclusive. Selection is made via a keyboard entry.
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Manual control mode
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Local setpoint 1, 2, 3, 4
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Direct controller action
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Hold SP Ramp/Program
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Select PID set 2, 3
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PV = Input2
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ReRun - SP Ramp/Program
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Run - SP Ramp/Program
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External program reset
Chapter 2 - Introduction

Honeywell UDC2800 Specifications

General

Control Modes	PID, ON/OFF, Manual
Mounting	Panel Mount
Display	Dual 4-digit LED
Input Types	Thermocouple, RTD, mA, mV, V
Output Types	Relay
Power Supply	100-240 VAC, 50/60 Hz
Communication	RS-485 Modbus RTU
Enclosure Rating	NEMA 4X