UNI-T UT321 Bedienungsanleitung PDF herunterladen

General

Specifications

<<Contents>> <<Index>>

GS 05D01D12-02E

©Copyright Apr. 2003

4th Edition Mar. 2005

UT321

UT321E

“E” indicates the

model with expanded

functions.

Indication

in green or

red color

Model UT321

Digital Indicating Controller

with Active Color PV Display

■ General

Model UT321 Digital Indicating Controller is a precision 1/8

DIN controller, provided with the PV display color changing

function "Active Color PV Display." It has a large display

for readings, universal input/output and excellent monitoring

operability with the Auto/Man switching key. In addition,

auto tuning, the overshoot suppressing function “SUPER”,

the hunting suppressing function “SUPER2” and heating/

cooling control are available as control functions, and a re-

transmission output and 15 V DC loop power supply are also

equipped as standard. A communication function or 24 V DC

loop power supply is available optionally. As described

above, the UT321 is a controller provided with higher func-

tions and capability.

■ Main Features

• Extra-large digital dispaly allows the indicated values to be

read even from a long distance. LEDs of 12 mm height are

used for the PV display.

• The PV display color changing function "Active Color PV

Display" is provided. PV display color is changed from green

to red and vice versa when an alarm occurs or deviation

becomes large. The color also can be fixed in green or red.

• Universal input and output allow simple setting of the input

type (thermocouple, RTD or mV), PV input range, and type

of control output (4 to 20 mA current, voltage pulse, or relay

contact) from the front panel.

• Parameters can easily be set using a personal computer.

("Parameter setting tool (model LL100)" sold separately is

required.)

• Various communication functions are provided. Communi-

cation is possible with personal computer, programmable

logic controller, and other controllers.

■ Functional Specifications

● Control Computation Functions

Control computation:

Can be selected from the following types:

Continuous PID control, Time-proportional PID

control, Heating/Cooling control (for heating/

cooling type only) or Relay ON/OFF control.

Control cycle time: 250 ms

Number of sets of target setpoints and PID parameters: 4

Target setpoint and PID selection:

PID parameters are provided for every target

setpoint and the set of PID parameters are

selected at the same time that the setpoint

number is selected.

Zone PID selection:

PID parameters are selected depending on the

value of the PV. For selection, the reference

point (PID parameter selection setpoint) or the

reference deviation is used.

Reference point method:

The PV input range is divided into a

maximum of three zones with up to two

reference points, and PID parameters are

selected (No. 1 PID to No. 3 PID) for every

zone.

Reference point = PV input range (0%) 

Reference point 1  Reference point 2 

PV input range (100%)

Reference point hysteresis = Fixed to 0.5% of the

PV input range span.

Reference deviation method:

PID parameters (No. 4 PID) are selected

when the deviation exceeds the reference

deviation. This methods takes precedence

over the reference point method.

Reference deviation = OFF or 0.1 to 100.0% of PV

input range span

No.1PID

No.2PID

No.3PID

Reference point 1

Reference point 2

PV input range (100%)

PV input range (0%)

Measured value (PV)

Reference deviation

Auto-tuning:

Available as standard. If auto-tuning is

operated, PID constants are automatically set

(limit cycle method).

“SUPER” function:

Overshoots generated by abrupt changes in the

target setpoint or by disturbances can be

suppressed.

1 2 3 4 5 6 ... 11 12

Inhaltsverzeichnis

Seite 1 - Specifications

GeneralSpecifications<<Contents>> <<Index>>GS 05D01D12-02EGS 05D01D12-02E©Copyright Apr. 20034th Edition Mar. 2005UT321UT321E

Seite 2 - ● Alarm Functions

Seite 3

Seite 4

Seite 5 - ■ Hardware Specifications

Seite 6

Seite 7 - ● Environmental Conditions

Seite 8

Seite 9

Seite 10 - Receiving 4-20 mA DC Current

Seite 11

Seite 12 - ■ Model and Suffix Codes

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