Honeywell UDC2500 Outhys, Pida, Proportional Gain-Regulates, Derivative Rate-Regulates, Pidb

Configuration

Function Prompt		Selection or Range of Setting				Parameter
Lower Display			Upper Display			Definition
English	Numeric		English	Numeric
	Code			Code
					DUPLEX ON/OFF is an extension of this
					algorithm when the output is configured for
					Duplex. It allows the operation of a second
					ON/OFF output. There is a deadband
					between the operating ranges of the two
					inputs and an adjustable overlap (hysteresis)
					of the on and off states of each output. Both
					Deadband and Hysteresis are separately
					adjustable. With no relay action the controller
					will read 50 %.
						Other prompts affected:
					ATTENTION
					OUTHYS and	DEADBD
		PIDA		1	PID A is normally used for three-mode
					control. This means that the output can be
					adjusted somewhere between 100 % and 0
					%. It applies all three control actions—
					Proportional (P), Integral (I), and Derivative
					(D)—to the error signal.
					Proportional (Gain)—Regulates the
					controller’s output in proportion to the error
					signal (the difference between Process
					Variable and Setpoint).
					Integral (Reset)—Regulates the controller’s
					output to the size of the error and the time
					the error has existed. (The amount of
					corrective action depends on the value of
					proportional Gain.)
					Derivative (Rate)—Regulates the
					controller’s output in proportion to the rate of
					change of the error. (The amount of
					corrective action depends on the value of
					proportional Gain.)
		PIDB		2	PID B—Unlike the PID A equation, the
					controller gives only an integral response to
					a setpoint change, with no effect on the
					output due to the gain or rate action, and it
					gives full response to PV changes.
					Otherwise controller action is as described
					for the PID A equation. See note on PID A.

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