Yokogawa UT750 Data sheet

<<Contents>> <<Index>>

General Specifications

MODEL UT750 Digital Indicating Controller (with Custom Computation)

GS 05D01B02-01E

■ General

Model UT750 Digital Indicating Controller is an intelligent, micro-processor based digital indicating controller with powerful control capability, custom computation function and the user-friendly large numerical display. The UT750 features many functions which are necessary for various control application as standard, and all of these functions such as control function, control computation function, signal computation function, etc. can be configured by using the keys on the front panel. The instrument specifies thirteen types of control strategies built in and also the overshoot suppressing function "SUPER" and a hunting suppressing function "SUPER 2" as well as an auto-tuning as standard.

■ Main Features

• Extra-large digital display allows the indicated values to be read even from a long distance. LEDs of 20 mm height are used for the process variable display. This is a five-digit display for higher resolution.

• User-friendly full dot LCD display. Not only the target setpoint and other control related parameters but also a deviation trend record or a deviation analogue bar can be

displayed.

• Thirteen types of control function, including single-loop control, cascade control, loop control with PV autoselector, and custom computation control, enabling the operator to start control operation immediately after simply entering the settings.

• Custom Computation function, which allows users’ own configuration for signals, enable them to realize such functions as complicated computation for input compensation or sequence logic.

( “Custom Computation Building Tool <model name:

LL200> is necessary to use this function.)

• Universal input and output enable users to set or change freely the type of measured inputs (thermocouple, RTD, or DCV), measurement input range, type of control output (4 to 20mA current, voltage pulse, or relay contact), etc. from the front panel.

• Equipped with seven contact inputs and outputs each, which are further expandable up to 23 inputs and outputs each by adding contact I/O signal expansion modules.

• Various communication function are provided. Communication is possible with personal computer, programable logic controller, and other controllers.

■ Functional Specifications

● Control Functions

UT mode

The following types of basic control structure can be set as the UT mode by the user.

Single-loop Control (UT mode 1):

The most simple and basic control function.

UT750

UT750E

“E” indicates with the model with expanded functions.

Cascade primary-loop control (UT mode 2):

Output tracking function and cascade control logic are provided. Suitable for the primaryloop cascade control.

Cascade secondary-loop control (UT mode 3):

Setpoint output and cascade control logic are provided. Suitable for the secondary-loop cascade control.

Cascade control (UT mode 4):

Dual control function for cascade control is available in a single instrument.

Loop control for back up (UT mode 5):

Output tracking function is provided to backup another control instrument. The switching between its control output and the control output of the instrument to be backed-up can be carried out by external contact.

Loop control with PV switching (UT mode 6):

Two measured inputs are switched for control depending on the status of contact input or measured input.

Loop control with PV auto-selector (UT mode 7):

Two measured inputs are automatically selected for control with a high, low, average, or temperature-difference value selector.

Dual-loop control (UT mode 11):

Dual control function is available in a single instrument to control two loop.

Temperature and Humidity control (UT mode 12):

Temperature and Relative Humidity control is available in a single instrument.

Cascade control with two universal inputs (UT mode 13):

Cascade control with using two universal measured inputs.

Loop control with PV switching and two universal inputs

(UT mode 14): Loop control with PV switching and two universal inputs available as measured inputs.

GS 05D01B02-01E

1st Edition Mar. 2000 (YG)

<<Contents>> <<Index>>

Loop control with PV auto-selector and two universal

inputs (UT mode 15): Process variable for loop control is automatically selected from two or three measured inputs by an internal selector, with using two universal inputs and an auxiliary analogue input. When two universal inputs are configured as measured input, auxiliary analog input can be used for a remote setting input.

Custom computation control (UT mode 21):

Can be provided by the user using the optional LL200 custom computation building tool.

● Control Computation Functions

In each UT mode, the following control computation functions can be selected.

Continuous PID control, Time-proportional PID control, Position proportional PID control(UT750-1 ■ position-proportional type only), Relay ON/OFF control, Heating/ Cooling control.

Target setpoint and PID parameter:

Maximum eight sets of target setpoint and PID parameters can be set and stored in a instrument. For Cascade control and Dual Loop control type, eight sets for each main and slave are available.

Zone PID selection:

Sets of PID parameters can be selected according to PV zone. Maximum seven zones can be set for selection.

Auto-tuning:

Available as standard. Possible to activate auto-tuning for both loops of Cascade control, Dual-loop control, and Temperature and humidity control.

“SUPER” function:

Overshoots generated by abrupt changes in the target setpoint or by disturbances can be suppressed.

“SUPER 2” function:

The function stabilizes the state of control that is unstable due to hunting, etc. without requiring any change in PID constants, when the load and/or gain varies greatly, or when there is a difference between the characteristics of temperature zones.

Preset output function:

When the instrument is in STOP mode, measured input is burnout, or abnormality is found in an input circuit, users’ preconfigurable preset value is output as a control output.

Control cycle time:

Each cycle time can be selected under the following coditions

50ms: Available when model code is "UT750-00",

UT mode is set to Single-loop control, and the following function is not used. “SUPER” function, “SUPER 2” function, Heating/Cooling control, measured input computations, setpoint rate of change limiter, output rate of change limiter, deviation alarm, sensor grounding alarm, fault-diagnosis alarm, FAIL output.

100ms: Available when model code is UT750-0 ■,

UT750-1 ■, (Without Cascade control)

200ms: Available when model code is UT750-5 ■

and the amount of computation module of Custom computation function is less than

30.

500ms: Available when the amount of computation

module of Custom computation function is more than 30.

(Set value on shipped from the factory: 200ms)

Operation Mode Switching

(Note: Communication enables all the following mode switching to be excuted.)

AUTO/MANUAL switching:

Bump-less switching is available. Switching between AUTO and MANUAL mode can be realized by using front key or by external contact, and external contact switching has priority to a front key operation. When UT mode is set to “Cascade secondaryloop control” or “Cascade control”, switching can not be realized by external contact.

RUN/STOP switching:

Switching of RUN/STOP can be realized by external contact. Bump-less switching from STOP to RUN is available. In RUN mode, control computation is activated. In STOP mode, control computation is ceased and preset output value is output as a control output, while other functions are operated normally.

REMOTE/LOCAL switching:

Switching between local setpoints and remote setpoint can be realized by instrument operation or external contact, and external contact switching is prior to instrument operation. For remote to local switching, either with bump-less tracking ( to make the local setpoint value equivalent to the Remote setpoint value upon switching.) or without tracking(to switch directly to local setpoint in the instrument) can be specified by the parameter.

CASCADE/AUTO/MANUAL switching:

Switching can be realized by instrument operation or external contact, and external contact switching is prior to instrument operation. Available when UT mode is set to

“Cascade secondary-loop control” or “Cascade control” .

Output tracking ON/OFF switching:

Available when UT mode is set to “Cascade primary-loop control” or “ Loop control for back-up”. Switching between External tracking signal and internal control output can be realized by external contact.

Control Parameter Setting Range

Proportional band: 0.1 to 999.9%

0.0 to 999.9% (for heating/cooling control.),

0.0% available for ON/OFF control Integral time: 1 to 6,000 s, or OFF (for Manual reset) Derivative time: 1 to 6,000 s, or OFF ON/OFF control hysteresis:

0.0 to 100.0% of measured input range width Preset output value: -5.0 to 105.0% of Output range

(0mA or less cannot be output)

GS 05D01B02-01E 1st Edition Mar. 31, 2000-00

<<Contents>> <<Index>>

Output limiter:

Setting range: -5.0 to 105.0% for both high and low limits. However, “low limit setpoint < high limit setpoint” must be satisfied. When heating/cooling PID control, upper limiter for heating and upper limiter for cooling.

Shutdown function(For 4 to 20 mA control output only):

In manual mode operation, up to approx. 0mA can be output.

Rate of change limiter for output:

OFF, or 0.1 to 100.0%/s

Dead band of heating/cooling control:

-100.0 to 50.0% of Output value

Dead band of position-proportional control:

1.0 to 10.0 % of Output value

● Configuration of Input/Output Signal

Measured Input Computations

Bias(-100.0 to 100.0% of measuring input range), First lag filter(OFF, 1 to 120 s), Square root extraction(for voltage input only, Input low cut 0.0 to 5.0%), 10-segment linearizer function, 10-segment bias function, relative humidity calculation by wet/dry bulb(for Temperature & Humidity control type)

Auxiliary Input Computations

Applicable for remote setting input only. Bias(-100.0 to 100.0%), First lag filter (OFF, 1 to 120s),

Square root extraction (Input low cut 0.0 to 5.0%), Ratio multiplication (0.001 to 9.999)

Custom Computations

LL200 Building tool is necessary to use Custom computation function.

Combining computation function modules allows such functions as users’ own configuration of input/output signals, operation mode switching via contact input, and status output via contact output.

Computation function module:

Addition/subtraction/multiplication/division, Processing absolute value/reciprocal, Selecting maximum/minimum/average, Keeping maximum/minimum value, Keeping value, Rate of change limiter, Switch, Limiter, Constant, AND, OR, Exclusive OR, NOT, Latch, Comparison (=,<,>,,), Not equivalent, Within range, AND(word), OR(word), Shift word, Sum, Timer, Tensegment linearizer 1/2, Inverse ten-segment linearizer 1/2, Curve linearizer 1/2, Ratio, First order lag filter, Conversion to industrial unit, Selection of PV from two inputs, Temperature and humidity calculation, MV selection1/2, Conversion of display value, Parameter setting, Data display1/2, Special contact output calculation, Assignment of output terminals 1/2, etc.

Maximum usable Number of Module:

Input custom computation 50 Output custom computation 50

● Alarm Functions

Alarm types:

PV high limit, PV low limit, Deviation high limit, Deviation low limit, Deenergized on deviation high limit, Deenergized on deviation low limit, Deviation high and low limits, High and low limits within deviation, Deenergized on PV high limit, Deenergized on PV low limit, SP high limit, SP low limit, Output high limit, Output low limit.

Alarm setting range:

PV/SP alarm: -100 to 100 % of measured input range Deviation alarm: -100 to 100 % of measured input range width Output alarm: -5.0 to 105.0% of output value Alarm hysteresis: 0.0 to 100.0 % of measured input range width

Delay timer:

0.00 to 99.59 (minute, second)

An alarm is output when the delay timer expires after the alarm setpoint is reached. Setting for each alarm is possible.

Stand-by action:

Stand-by action can be set to make PV/ deviation alarm OFF during start-up or after SP change unitl SP reaches the normal region.

Timer function (stabilization of control status notification

event) (Alarm 1 only): The timer function sets alarm 1 output to ON/ OFF when preset time is elapsed after PV has reached to the SP and its hysteresis band. Activated again by RUN/STOP switching or SP switching.

Other alarm actions:

Sensor grounding alarm: Detects sensor deterioration and outputs an alarm. Fault diagnostic alarm: Input burnout, A/D conversion error, RJC error. FAIL output: Abnormality in software, or

Abnormality in hardware. Number of alarm settings: 4 points (for each loop) Alarm output points: 4 points

Up to 4 points can be selected among PV,

deviation, SP, output sensor grounding, fault

diagnosis and FAIL alarms and output.

Timer function is available with alarm 1

output only.

Note: See the Hardware Specifications and the contents of

Contact Outputs described later.

● Display and Operation Functions

PV Display Unit

Either PV1 or PV2 can be displayed on 5 digit digital display unit and switched one from the other.

Digit of display is 4 or 5 digit. For Thermocouple and RTD input, Lower digit than decimal point can be turned off.

The display range is -19999 to 30000 and the display span is 30000 or less. [750.00 appearing in the product photograph on page 1 cannot actually be displayed.]

<<Contents>> <<Index>>

LCD Display Unit

Some data are displayed on LCD display unit. Each screen is called “display”.

Four types of displays are provided. Operating display, Operating parameter setting display, setup parameter setting display, and SELECT display.

Each screen of LCD display unit Operating display:

Necessary data for operation is displayed according to UT mode. Such items as Setpoint, Control output, Control output bargraph, deviation trend, and deviation analogue bar-graph are displayed. Memorable time of deviation trend is 120 s to 20 h.

Operating parameters setting display:

The Operating parameters, which are mainly changed during operation, such as PID constant, are displayed.

Setup parameter setting display:

The Setup parameters to configure the functions of the instrument before starting operation are displayed. UT mode is set in this display.

Status lamps

Second PV (PV2), deviation (▲, Alarm (AL1,2,3,4), Cascade (CAS), Remote (REM1,REM2), Manual (MAN1,MAN2), Stop (STP)

Communication port for light loader

Communicate with the tool on the PC to transfer the setting data of parameters / Custom computation.

■

, ▼ )

SELECT display:

Up to 5 displays which are frequently

accessed can be selected from the Operating

parameter setting display and Setup para-

meters setting display to be displayed in the

SELECT display.

Status Lamps

Alarm indicating lamp: 4 points(AL1,AL2,AL3,AL4) Operation mode indicating lamp:

PV 2 (PV of Loop 2), REM 1 (Remote

operation of Loop 1), REM 2 (Remote

operation of Loop 2), MAN 1 (Loop 1 in

Manual mode operation), MAN 2 (Loop 2 in

Manual mode operation), STP (Operation is

ceased), CAS (Cascade operation) Deviation indicating lamp:

䉱 Plus deviation , 䉲 Minus deviation, and

deviation in normal range

Deviation band for the display can be set.

LED display unit (for PV)

Display PV, and error code when error is detected.

LCD display unit

Display setpoint (SP), output value, deviation bargraph, deviation value, deviation trend, valve opening and setting item/value of parameters.

Operation keys

Increase/Decrease the setting data (䉭, 䉮) Switching the display (DISP) Select parameter/Enter the setting data (SET/ENT) A/M mode switching of Loop 1 (A/M).

Examples of Communication System Configuration Diagram

(1) Computer link communication/

MODBUS communication

Personal computer

PV2

1 2 3

REM

MAN1 MAN2 STP CAS

A/M

DISP

SET/ENT

PV2

REM

MAN1

MAN2

STP

CAS

A/M

DISP

SET/ENT

PV2

1 2 3

REM

MAN1 MAN2 STP CAS

A/M

DISP

SET/ENT

UT750 Digital indicating controller

(3) Coordinated operation

PV2

1 2

UP750 Program controller

3 REM 4 MAN1 MAN2 STP CAS

A/M

DISP

SET/ENT

or UT750 Digital indicating controller

PV2

1 2 3

REM

MAN1 MAN2 STP CAS

A/M

DISP

SET/ENT

PV2

REM

MAN1

MAN2

STP

CAS

A/M

DISP

SET/ENT

PV2

1 2 3

REM

MAN1 MAN2 STP CAS

A/M

DISP

SET/ENT

UT750 Digital indicating controller

(2) Ladder communication

MELSEC-A

PV2

1 2 3

REM

MAN1 MAN2 STP CAS

A/M

DISP

SET/ENT

UT750 Digital indicating controller

(4) Digital I/O Expansion Module (µ-BUS communication)

PV2

UT750

2 3

REM

MAN1 MAN2 STP CAS

A/M

DISP

SET/ENT

Digital Indicating Controller

D I/O Expansion module

Programmable logic controller

PV2

1 2 3

REM

MAN1 MAN2 STP CAS

A/M

PV2

1 2 3

REM

MAN1 MAN2 STP CAS

A/M

DISP

SET/ENT

DISP

SET/ENT

PV2

1 2 3

REM

MAN1 MAN2 STP CAS

A/M

DISP

SET/ENT

GS 05D01B02-01E

1st Edition Mar. 31, 2000-00

<<Contents>> <<Index>>

Operation Keys

䉭, 䉮 key: Increases/decreases the value of Setpoints or

other parameters which appear on LCD display. DISP key: Switch data to be showed on LCD display SET/ENT key: Set/change the setting value, switch

contents to be showed on LCD display, switch

operation mode other than AUTO/MAN. A/M key: Switch operation mode (AUTO/MAN)

Security Function

Key lock from parameter setting and operation

can be inhibited by a password.

● Communication Functions

( For UT750- ■1 only )

The instrument has two communication port and five types of communication protocols, and allows the simultaneous communication with two different instruments.

The instruments to communicate are a personal computer, a programmable logic controller, and other UT750/UP750.

Input type

Unspecified (When shipped from the factory) Thermocouple

RTD

Standard signal

DC voltage

J T

S R N

E L (DIN) U (DIN)

W (DIN) Platinel 2 PR20-40

W97Re3-W75Re25 JPt100

Pt100

0.4 to 2V 1 to 5V 0 to 2V 0 to 10V

0.0 to 1.2 V (Note 3)

-10 to 20mV 0 to100mV

Input range

code

typeK1 (1) typeK2 (2) typeK3 (3) typeJ (4) typeT1 (5) typeT2 (6) typeB (7)

typeS (8) typeR (9) typeN (10)

typeE (11) typeL (12) typeU1 (13) typeU2 (14) typeW (15) plati2 (16) PR2040 (17)

W97Re3 (18) JPt1 (30) JPt2 (31) Pt1 (35) Pt2 (36) Pt3 (37)

0.4 to 2V (40) 1 to 5V (41) 0 to 2V (50) 0 to 10V (51)

0.0 to 1.2 V mV1 (55) mV2 (56)

OFF

Instrument

range (°C)

Set the data item PV input type “IN 1” to the OFF option to leave the PV input type undefined.

-270.0 to 1370.0°C

-270.0 to 1000.0°C

-200.0 to 500.0°C

-200.0 to 1200.0°C

-270.0 to 400.0°C

0.0 to 400.0°C

0.0 to 1800.0°C

0.0 to 1700.0°C

-200.0 to 1300.0°C

-270.0 to 1000.0°C

-200.0 to 900.0°C

-200.0 to 400.0°C

0.0 to 400.0°C

0.0 to 2300.0°C

0.0 to 1390.0°C

0.0 to 1900.0°C

0.0 to 2000.0°C

-200.0 to 500.0°C

-150.00 to 150.00°C

-200.0 to 850.0°C

-200.0 to 500.0°C

-150.00 to 150.00°C

0.400 to 2.000 V

1.000 to 5.000 V

0.000 to 2.000 V

0.00 to 10.00 V

0.000 to 1.200 V

-10.00 to 20.00 mV

0.0 to 100.0 mV

Communication Protocol

Computer link communication:

Ladder communication:

Coordinated operation protocol:

MODBUS communication:

Digital input/output expansion (µ-Bus):

Instrument

-450.0 to 2500.0°F

-450.0 to 2300.0°F

-200.0 to 1000.0°F

-300.0 to 2300.0°F

-450.0 to 750.0°F

-200.0 to 750.0°F

-300.0 to 2400.0°F

-450.0 to 1800.0°F

-300.0 to 1600.0°F

-300.0 to 750.0°F

-200.0 to 1000.0°F

32.0 to 2500.0°F

-300.0 to 1000.0°F

-200.0 to 300.0°F

-300.0 to 1560.0°F

-300.0 to 1000.0°F

-200.0 to 300.0°F

Display range

-19999 to 30000 Display span 30000 or less (Decimal point position changeable)

Communication protocol with a personal computer.

Communication protocol with the ladder program on some programmable logic controllers.

Protocol to realize Coordinated operation with other GREEN SERIES controller. UT750 can be configurated as either master or slave unit.

Communication protocol with a personal computer or PLC.

Protocol to connect Digital I/O expansion module to increase the number of Discrete Input and Output.

range (°F)

32 to 3300°F

32 to 3100°F 32 to 3100°F

32 to 4200°F

32 to 3400°F

32 to 3600°F

Instrument accuracy

±0.1% ±1 digit of instrument range at 0°C or more ±0.2% ±1 digit of instrument range at less than 0°C

• However, ±2% ±1 digit of instrument range for type K at temperatures less than -200°C. However, ±1% ± 1 digit of instrument range for type T

• at temperatures less than -200°C.

±0.15% ±1 digit of instrument range at 400°C or more ±5% ±1 digit of instrument range at less than 400°C

±0.15% ± 1 digit of instrument range

±0.1% ± 1 digit of instrument range ±0.25% ±1 digit of instrument range for temperature at less than 0°C

±0.1% ±1 digit of instrument range at 0°C or more ±0.2% ±1 digit of instrument range at less than 0°C

• However, ±1.5% ±1 digit of instrument range for type E at temperature less than -200°C.

±0.2% ±1 digit of instrument range ±0.1% ± 1 digit of instrument range

±0.5% ±1 digit of instrument range at 800°C or more

Accuracy not guaranteed for temperature less than 800°C

±0.2% ± 1 digit of instrument range ±0.1% ± 1 digit of instrument range (Note 1) (Note 2) ±0.2% ± 1 digit of instrument range (Note 1) ±0.1% ± 1 digit of instrument range (Note 1) (Note 2)

±0.2% ± 1 digit of instrument range (Note 1) ±0.1% ± 1 digit of instrument range

Numbers in ( ) are the measurement input range codes that apply when the communication function is used.

*1: Performance in the standard operating conditions (at 23±2°C, 55±10% RH, and 50/60Hz power frequency) Note 1: The accuracy is ±0.3°C of instrument range ±1 digit for a temperature range from 0 to 100°C Note 2: The accuracy is ±0.5°C of instrument range ±1 digit for a temperature range from –100 to 200°C. Note 3: 0.0 to 1.2 V DC range is for universal input 2 (41, 42 and 43 terminals) only.

1st Edition Mar. 31, 2000-00

+ 10 hidden pages