UNI-T UT321 Specifications download pdf (Page 5)

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 Single-loop control

 Cascade primary-loop control

 Cascade secondary-loop control

 Cascade control

 Loop control for backup

 Loop control with PV switching

 Loop control with PV auto-selector

 Loop control with PV-hold function

 Dual-loop control

 Temperature & humidity control

 Cascade control with two universal inputs

 Loop control with PV switching and two universal inputs

 Loop control with PV auto-selector and two universal inputs

 Custom computation control

 14 types of build-in Controller Functions

PV auto-selector

SELECT

PID

Dual-loop control

PID

PV switching

PID

Temperature & humidity control

Cascade control

Loop control for backup

PID

Relative

Humidity

Calculation

Operation with load causes

PV hunting.

Time

Changing SP causes hunting.

Time

Control using SP

with the set PID.

Time

SUPER 2 function suppresses hunting.

Time

Control using SP

with the set PID.

SUPER 2 function suppresses

hunting even if SP is changed.



SUPER Function suppresses overshooting

The field-proven

SUPER

function utilizes built-in operator experience and fuzzy theory to deliver fine control and suppress overshooting.

The new

SUPER 2

function utilizes built-in operator experience and modern control theory to deliver fine control and suppress hunting.

Startup Program operation

Time

TimeTime

Temperature

Disturbance

SUPER:off

SUPER:on SUPER:on SUPER:on

 When SUPER 2 function is not used  When SUPER 2 function is used

Effect 1: For operation of empty furnace with the set PID

Effect 2: For changing SP

MODBUS Communication

A protocol used for communicating

with a general-purpose personal computer

and PLC.

Protocol: MODBUS RTU

MODBUS ASCII

Baud Rate: 600bps to 38.4kbps

(up to 9,600bps in case of MODBUS.)

Personal computer, or PLC

RS232C/RS485 converter

GREEN SERIES controllers

Max. 1200 m; up to 31 slave controllers can be connected

PLC

CX communication

A CX1000/2000 lets you control external UT controllers with same ease as

CX’s embedded controls.

Connectable models :UT320, UT321, UT350, UT351, UT420, UT450, UT520,

UT550, UT750

Personal Computer Link

Communication

A protocol used for communicating with a gen-

eral-purpose personal computer, or UT link

module and serial communication module of

PLC (FA-M3 range-free controller).

FA-M3 and a recorder can be connected in the same line.

Personal computer, or PLC

RS232C/RS485 converter

GREEN SERIES controllers

Max. 1200 m; up to 31 slave controllers can be connected

PLC

Coordinated Operation

In coordinated operation, a UP program controller or

UT digital indicating controller is used as a master con-

troller and multiple UT digital indicating controllers as

slave controllers. The slave controllers are operated in

accordance with the actions of the master controller.

Ladder Communication

A protocol used for communicating with a PLC.

Communication with a computer link unit of the

MELSEC-A series (made by Mitsubishi Electric Corpo-

ration) is possible.

() FA-M3 is the PLC made by Yokogawa.

FA-M3

()

Max. 1200 m; up to 31 slave controllers can be connected

GREEN SERIES controllers

UP program controller or UT digital indicating controller

GREEN SERIES controllers

Max. 1200 m; up to 31 slave controllers can be connected

Powerful Control Functions

Various functions for freely creating input/output-related computations

Communication Functions

Max. external loops:

4(CX1000), 16(CX2000)

(Two-loop controllers count as two loops each.)

CX1000 or CX2000

RS485, MODBUS



SUPER 2 Function suppresses hunting

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UNI-T UT321 Specifications Page 5

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