Honeywell UDC 3300 사용자 설명서

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UDC 3300 Controller Product Manual

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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.

• The IN2 LO must be greater than or equal to the IN1 LO.

• The TUNING GAIN2 must be equal to

(IN1 HI – IN1 LO) / (IN2 HI – IN2 LO).

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

▲ ▼

PID SETS

2KEYBD

LSP’S

TWO

SP TRACK

NONE

Select other control parameters as needed by the
application.

CONT ALG

PD+MR

This allows setting of the Manual Reset value.

MAN RSET

0

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