Honeywell UDC 3300 manual OUT Ovrd, PID a PID B PD+MR Disabl HI SEL LO SEL

Lower Display

Prompt

OUT OVRD

Upper Display

Range of Setting

or Selection

PID A

ATTENTION PID A should not be used for Proportional only action; i.e., no integral (reset) action. Instead, use PD+MR with rate set to 0.

PID B

PD+MR

DISABL

HI SEL

LO SEL

Parameter

Definition

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.)

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.

PD WITH MANUAL RESET is used whenever integral action is not wanted for automatic control. The equation is computed with no integral contribution. The MANUAL RESET, which is operator adjustable, is then added to the present output to form the controller output.

Switching between manual and automatic mode will be bumpless.

If you select PD with Manual Reset you can also configure the following variations

•PD (Two Mode) control,

•P (Single Mode) control.

Set Rate (D) to 0.

Other prompts affected: MANRSET3

OUTPUT OVERRIDE SELECT— This selection lets you select high or low output override. Only available if the controller is configured for 2-Loop operation. (NOTE 1)

ATTENTION Loop 1 must be in Automatic for this selection to work. While the output is being overridden, an “O” appears as the leftmost digit of the upper display.

DISABLE— Disables Output Override.

HIGH SELECT— The controller will select the higher of output 1 or output 2 and direct it to output 1 rear terminals.

LOW SELECT— The controller will select the lower of output 1 or output 2 and direct it to output 1 rear terminals.

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