Honeywell UDC 3300 manual Refer to -33 and set up the controller in the order shown

Description

Configuration

The “AM STA” selection of digital input creates a repeater station when the digital input is closed. This is accomplished by a multi-selection from the digital input menu.

•“ACTION” is forced as “DIRECT”.

•“CONT ALG” is forced as “PD+MR”.

•Active setpoint is forced to 2SP.

•The PV is switched to “PV 2IN”.

•The tuning parameters used are the second set of parameters.

When the switch is open the unit becomes a normal controller with “CONT ALG” of “PID A”, using tuning parameters set 1, SP, PV as IN1 and “DIRECT” or “REVERSE” as selected by customer configuration.

Input 1 is typically the PV of some upper controller and Input 2 is typically that controller’s output. If the upper control fails, the upper device or some watchdog opens the digital input switch and UDC 3300 back-up PID A control is active.

When the upper control reactivates, the digital input switch is closed and the Auto/Manual Station becomes a repeater station and allows the upper control output signal to pass through.

There are some things to consider when configuring the controller.

The PV range stays as the IN1 range, even while IN2 is the PV when the switch is closed; therefore:

•The IN2 HI must be less than or equal to the IN1 HI. (Suggest: IN2 HI = 100.0)

•The IN2 LO must be greater than or equal to the IN1 LO. (Suggest: IN2 LO = 0.0)

•The TUNING GAIN2 must be equal to (IN1 HI – IN1 LO) / (IN2 HI – IN2 LO).

Configuration Refer to Table 5-33 and set up the controller in the order shown.

Table 5-33 Auto/Manual Station Mode Configuration Procedure

Step

1

2

3

Press	SET	Press	FUNC	to
	UP
to Select Set		Select
Up Group		Function
		Prompts
Control		PID SETS
		LSP’S
		SP TRACK
Algorithm		CONT ALG
Tuning		MAN RSET

Press ▲ ▼
to Enter	Remarks
Value or
Selection
2KEYBD	Select other control parameters as needed by the
TWO	application.
NONE
PD+MR	This allows setting of the Manual Reset value.

0Manual reset of 0 for no output bias and requires LSP2 = 0 %. If bias is required, set MR to equal the desired output bias value.

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