Advanced Application UT75A

The UT75A temperature controllers employ an easy-to-read, 14-segment large color LCD display, along with navigation keys, thus greatly increasing the monitoring and operating capabilities. A ladder sequence function is included as standard. The short depth of the controller helps save instrument panel space. The UT75A also support open networks such as Ethernet communication.

UT75A Temperature Controller Features

  • Comes with a 2-loop control function
  • Ladder sequence capacity up to 1,000 steps
  • Includes custom ladder function
  • Offers 20 sets of target setpoints
  • Supports open networks (CC-Link, PROFIBUS-DP, DeviceNet)


Product Details

UT75A Temperature Controller


The Enhanced Peformance, Usability, and Flexibility Meet the Advanced Control Needs in a Wide Variety of Applications

Enhancing Productivity by Managing a Variety of Recipes

Switching between 20 Recipes

  • Increasing yield by managing a variety of recipes
  • Increasing quality in combination with 16 PID values

Increasing yield by managing a variety of recipes

Program pattern operation

  • Program pattern consists of up to 20 segments
  • 2-loop program pattern can be operated

2-loop program pattern can be operated

Easy to switch between recipes with a PLC

  • Since CC-Link, Profibus, and DeviceNet are supported, it is easy to link to a PLC that manages recipes

Reducing Engineering Costs and Peripheral Devices

Easy to switch between recipes with a PLC

Simplifying ladder programs

  • Multi-line ladder programs such as numerical calculation can be turned into a single line using a custom ladder instruction.
  • This simplifies the ladder programs and facilitates easy engineering and maintenance.
  • Created custom ladder instructions can be saved in a file.
  • Custom ladder instructions saved in a file can be used by another UT75A temperature controller.




External calculators and sequence control circuits (relay, timer, etc.) can be reduced

  • Complex I/O offset calculation and alarm sequence control can be accomplished using a ladder program
  • Engineering costs such as wiring and initial setup can be reduced significantly
  • A sequence over 2 loops can be created for 2-loop control

External calculators and sequence control circuits (relay, timer, etc.) can be reduced

Communication with a PLC is possible without using any program

  • CC-Link, Profibus, and DeviceNet are supported (optional)
  • Since communication with the PLC without using any program is possible, engineering costs can reduced.

Communication with a PLC without using any programProtecting Knowledge of Users

Custom arithmetic expressions can be created using a ladder program

  • Multi-line ladder programs such as numerical calculation can be simplified into a single line using a custom ladder program
  • Custom ladder programs are securely managed using passwords
    - Custom arithmetic expressions can be made inaccessible to protect the knowledge of users

Custom arithmetic expressions can be created using a ladder program

Inheriting and Enhancing the UT750

2-loop control with a single controller

  • 2-loop synchronous and independent operation is available
    - The start and stop instructions can be run synchronously or independently.
  • Program pattern operation and constant value operation are available for 2-loop control
    - A sequence can be run by combining the program pattern operation and fixed-point operation.

2-loop control with a single controller

A variety of arithmetic instructions and large capacity ladder programs

  • 15 basic instructions and 111 application instructions
  • Ladder program capacity up to 1,000 steps

A variety of arithmetic instructions and large capacity ladder programs

Advanced arithmetic instructions are available

  • Square root, exponential, and logarithmic calculations are available
  • Temperature/humidity and CP calculations are available

Advanced arithmetic instructions

Reducing Downtime

Universal input and output

  • A single backup controller can be used for different control objects with different types of sensors and heaters/actuators
    - The UT75A can flexibly respond to a failure and sudden specification changes.

Universal input and output

Simple parameter setting and transition using an LL50A

  • Parameters can be set on other controllers just by copying them
  • Parameters can be set before mounting the controller to the panel
  • Parameters can be set without power supply for the controller

Simple parameter setting and transition using an LL50A

Advanced Control

9 Built-in Control Modes

The control mode allows easily configuring settings and making changes with parameters.

  • 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
  • Control with PV-hold function
  • Dual-loop control

8 built-in Control Mode

8 Built-in Control Types

  • 8 Built-in Control TypesPID control
  • ON/OFF control (1 point of hysteresis)
  • ON/OFF control (2 points of hysteresis)
  • Two-position, two-level control
  • Heating/cooling control
  • Sample PI control
  • Batch PID control
  • Feedforward control

For the correspondence between the above control mode and control types for each model, please refer to the specifications of each model.

Ladder Sequence Control

With built-in ladder sequence control, the range of applications are dramatically increased. This feature is standard in all the UTAdvanced controllers (except UM33A). The ladder sequence control function can replace a small PLC required by the application. Sequence control and PID control can be performed simultaneously.

  • Monitoring and control of external machinery
    E.g.: Lamps, switches, timers
  • Solve digital input/output logic functionality easily.
    Number of basic command types: 13
    Number of application command types: 73
[Example of ladder instruction] [Example of ladder programming]
ladder programming

Application Examples of Ladder Sequence Program

Alarm Sequence Control Circuits Can be Reduced
The ladder sequence program is built in the UTAdvanced as standard. The ladder sequence function enables monitoring and controlling peripheral devices such as relays, thus making it possible to reduce costs.

Alarm action was built by a sequence control circuit (relay, timer, etc.) outside of the controller.

Alarm action is built by the ladder sequence program inside the UTAdvanced, thus making it possible to reduce costs.

Alarm Sequence Control Circuits can be Reduced

Example: Alarm annunciator

Host System Load is Reduced


Various types of analog data were captured into the host system (PLC, etc.) and calculated, and the results were processed by the field controller for control via a command.


The UTAdvanced with up to 4 analog inputs* enables various types of analog data to be captured directly into the controller and calculated by the ladder program, thus reducing the system-building load of the host. Action: Various types of analog data were captured into the host system (PLC, etc.) and calculated, and the results were processed by the field controller for control via a command.
* In the case of the UT55A

Host System Load is Reduced

Universal Input/Output
Select Input and Output Types via Configuration

Universal Input

Select from TC, RTD, mV/DC voltage and DC current.
(DC current input: No shunt resistor required)

Universal InputThe input type and range is user selectable via the front panel or by using the LL50A parameter setting software.

  • ±0.1% Indication Accuracy.
  • Connect up to two 2-wire transmitters simultaneously.

All instruments have a 15 V Loop Power Supply (15 V LPS) for a transmitter.
In addition, a 24 V LPS is also available simultaneously for some instruments as optional function.

Universal Input

Universal Output

User selectable for relay, Voltage pulse and current outputs.

  • Relay output: ON/OFF control, time-proportional PID control
  • Voltage pulse output: time-proportional PID control
  • Current output: continuous PID control

Heating/cooling control has two sets of universal outputs.

  • Any combinations of relay, pulse and current outputs are available.

Drive a motorized control valve by using position-proportional PID.

  • The position-proportional PID control function has two sets of relay outputs for direct/reverse rotation of motorized control valve.
  • The slide wire input to feed back the valve position is also available.

Auto-tuning (AT) Function

The following conditions can be set in order to increase the accuracy of calculating PID constants using AT .

  1. Two types of algorithms to calculate PID constants are available for selection.
    Normal: fast-rising PID constant
    Stable: slow-rising PID constant
  2. High and low output limits can be set individually for control output values during AT runtime.

Fuzzy Logic

SUPER Function Suppresses Overshoot

The field proven SUPER function utilizes a built-in operator experience and fuzzy theory to deliver fine control and suppress overshoot.

SUPER Function Suppresses Overshoot

SUPER2 Function Suppresses Hunting

The new SUPER2 function utilizes a built-in operator experience and modern control theory to deliver fine control and suppress hunting.

SUPER2 Function Suppresses Hunting

LL50A Parameters Setting Software

Parameter Setting/Program Pattern Creating Function

Parameters that determine controller functions can easily be set: controller model type, controller mode (single-loop control, cascade control, loop control with PV switching, etc.), universal input/output functions, setup parameters and others. It also allows you to create program patterns.

Parameter setting functions

Tuning Function

Used to tune a controller's PID parameters. Displays measured input value, target setpoint, and control output value as a trend graph on a personal computer screen, allowing PID parameter modification, AUTO/MAN switching, control output modification in manual operation, etc.

Tuning function

Ladder Building Functions

Ladder sequence programs can be created and ladder programs can be monitored.

Ladder Building functions

Network Profile Creation Function

Can be used to create an electronic device data sheet for Open Network.

Via Bus Powered USB Cable

Can be set parameters and ladder program while no power supply to controller.

Via Bus Powered USB Cable

Via Ethernet Communication Connector

Via Ethernet Communication Connector

Via Dedicated Adapter

Via Dedicated AdapterCan be used while attached to the control panel.

  • Applicable Termperature Controllers: UT75A, UT55A/UT52A, UT35A/UT32A, UP55A/UP35A/UP32A, UM33A

Via RS-485 Communication Terminals

Via RS-485 Communication Terminals


Bright & Easy to Read Active Color LCD Display

Bright & Easy to Read Active Color LCD Display

Versatile Color LCD Display

Versatile Color LCD Display


Optimal Display

Optimal DisplayThe controller menus and layout are adjusted in accordance with the level (EASY, STD, PRO) of information required by the user. If simple temperature or level control is needed, then select the easy configuration. Very sophisticated applications are no problem for the UTAdvanced. Just select the PRO setting and make use of the additional functionality shown in this mode. Advanced applications can be programmed in the PRO setting and then changed back to the easy setting to lock out functions not required by operators.

Active Color LCD Display

With Yokogawa's Active color display you can instantly tell, at a glance, the status of your process.
Alarm Status: Active color display changes from white (normal) to red (alarm).
Deviation Status: Color changes based on a PV deviation from SP.
User-defined Color: Choose between white or red display for constant Readings.

Active Color LCD Display

Compact Design

The 65-mm depth of the controller reduces the constraints on installation location.

Compact Design

Easy Operation Map, Navigation Guide and Navigation Keys

The navigation keys is an intuitive method to navigate the controller's configuration menus and setting its various menus. Navigation arrows even tell you what button to push next.

Easy Operation Map, Navigation Guide and Navigation Keys

Programmable Function Keys

Programmable Function KeysIt is easy to assign frequently used functions, such as the operation mode switch, Run/Stop, program pattern selection, Remote/Local, alarm latch release, and PID parameter display. The function of an external switch can also be assigned to the front panel key in conjunction with a ladder sequence program.

Scrolling Text

Scrolling Text

The UTAdvanced is equipped with a scrolling text feature that fully lists the parameter being modified. There is no guessing what parameter you are looking at. It is possible to turn off scrolling the text function.

Multiple Language Support

Multiple language support

The UTAdvanced is fluent in multiple languages — English, Spanish, French, and German. The use of the UTAdvanced by local language operators is not an obstacle.

User Settable Default Values

User settable default valuesParameter values (SP, P, I, D, ALM1, etc.) configured by the user can be stored in the controller as the default values. Even if a parameter set value is accidentally changed, it can be restored to the original value with a simple operation.

Now Available in Two Colors (White or Black)

UT55A/UT52A White & Black Models

Now you can choose a color that matches your work area: white (light gray), or black (light charcoal gray).

Parameter Setting

LL50A Parameter Setting Software (sold separately) allows for easily setting parameters.

Parameter Setting

Message Function

Using the message function and turning the contact input on/off, the message registered beforehand can be displayed on PV display by interrupt.The message is registered using LL50A Parameter Setting Software.The messages are limited to 20 alphanumeric characters. A maximum of four messages can be registered.

Message Function

Quick Setting Function

Minimum parameters necessary for operation can be set.

Security Function

The password function can prevent inadvertent changes to the parameter settings. If a password is set, the password is required when moving to the Setup Parameter Setting Display. When the password is verified, can be changed to the Setup Parameter Setting Display.


Communication Functions

A simple and easy network connection is provided!
A built-in function in the controller eliminates the need for a converter and makes wiring simple.

Communication Functions


Modbus TCP/IP, a protocol that allows the controller to connect to any Ethernet network and have the ability to exchange data with the computers or devices on that network.

  • Allows control devices to be integrated into an application simply.
  • Works with any Modbus TCP/IP compliant software. 
  • Support for Modbus function codes 03, 06, 08 & 16. 
  • Gateway function allows RS-485 Modbus devices to communicate via Ethernet. 
  • Reduced labor costs in wiring and setup of a communications network. 
  • Physical Layer: 10 BASE-T/100 BASE-TX 
  • Maximum number of connection: 2

Modbus / TCP


The data of UTAdvanced (slave units) can be displayed and saved on the DXAdvanced using the Modbus RTU function.

Modbus / RTU

Open Network (PROFIBUS-DP, CC-Link, DeviceNet)

Embedded open networks will provide direct connection to PLC's.

  • Reads data from UTAdvanced
  • Writes parameter setting value to UTAdvanced



Peer to Peer

The use of the ladder sequence program makes it possible to exchange analog data and status data between communication-capable UTAdvanced.

Example: A UTAdvanced in which an input error occurs sends a signal to another UTAdvanced to enable that UTAdvanced switch to MAN operation, thus shifting the whole system into a safe mode. In such a case, the safety mechanism can be built into the UTAdvanced and is not required in the host system.

Peer to Peer

Coordinated Operation

In coordinated operation, a single UTAdvanced termperature controller is used as a master controller and multiple UTAdvanced or other UTAdvanced digital indicating controllers as slave controllers.

The slave controllers are operated in accordance with the actions of the master controller.

Coordinated Operation


A protocol used for communicating with a general-purpose personal computer, or UTAdvanced series link module and serial communication module of FA-M3R (range-free controller).



Dependable 3 year warranty*1

Backed by the high reliability and quality that Yokogawa has cultivated over many years.3 year warranty

RoHS/WEEE compliant

UTAdvanced is environmentally safe when disposing.

Dust-proof and drip-proof front panel (NEMA4*2 /IP66)

UTAdvanced can also be used for food-processing equipment with washable control panels.


  1. The 3 year warranty extends 36 months after shipment from our factory.
  2. Hose down test only.


PV input Input type Universal input (TC, RTD, mV, V, mA)
Number 1(Std) 2(Max)
Indication accuracy ±0.1% of F.S.
Number of Control loops   1(Std) 2(Max)
Control scan period   50, 100, 200 msec
PV/SP data display   14-segment, 5 digits, Bar graph LCD display
Control outputs (MV) Type Relay, Voltage Pulse, Current
Algorithm ON/OFF, PID (Continuous, Time-proportional), Heating/Cooling, Position-proportional
Digital inputs Number 3(Std) 8(Max)
Type SP No.Change, PID No. Change, A/M Change, etc
Digital outputs Number 3(Std) 8(Max)
Function PV High, PV Low, Dev High, etc
Number of Program pattern Number 1
Number of program segment Number 20(Max)
Retransmission Number 1
Type PV, SP, OUT, etc
Remote (aux.) input (option) Number 1 or 2
Type 1 to 5 V, etc
Communication (option) Number 1 or 2
Type RS-485, Ethernet, PROFIBUS-DP, CC-Link, DeviceNet
Other specifications Power supply 100 to 240 VAC (+10%, -15%) or 24 VAC/DC (+10%, -15%) (option)
Power consumption Max 18 VA
Mass Max 0.5 kg

Comparison Chart (UT75A/UT55A/UT52A/UT35A/UT32A)

  UT75A UT55A UT52A UT35A UT32A
Model UT75A UT55A UT52A UT35A UT32A
Size 1/4 DIN    
1/8 DIN      
Depth from the panel surface (mm) 65 65 65 65 65
Number of Control loops Standard (Maximum) 1(2) 1 1 1 1
Control Scan Period (msec) Choice 50/100/200 Choice 50/100/200 Choice 50/100/200 200 200
Display Function Number of PV Display Digits 5 5 5 5 5
Active Color PV Display Function
Guide Scroll Display Function
Message Display Function
Bar graph display (Number) ✓(2) ✓(2) ✓(2) ✓(1) ✓(1)
PV Input Indication Accuracy (% of F.S.) 0.1 0.1 0.1 0.1 0.1
PV Input Type TC
RTD (3-wire)
RTD (4-wire)    
mV, V
Number of Analog Inputs Standard (Maximum) 1(4) 1(4) 1(2) 1 1
Number of SPs (PIDs) Maximum 20(16) 8 8 4 4
Number of Control Modes Maximum 9 8 8 1 1
Number of Control Types Maximum 8 8 8 5 5
Control Output Type Relay Contact Output, Voltage pulse output, Current output
Algorithm ON/OFF
PID (Continuance, Time Proportion)
Position proportional
Number of Analog Outputs Standard (Maximum) 2(3) 2(3) 2(3) 2 2
Number of Digital Inputs Standard (Maximum) 3(8) 3(9) 3(5) 2(7) 2(4)
Number of Alarms   8 8 8 4 4
Number of Digital Outputs Standard (Maximum) 3(8) 3(18) 3(5) 3(8) 3(5)
Communication RS-485 communication (Maximum) ✓(2) ✓(2) ✓(1) ✓(1) ✓(1)
Ethernet communication    
Open Network (CC-Link/PROFIBUS-DP/DeviceNet)    
Various Function Quick Setting Function
Split Computation Output Function    
Ratio and Square Root Extraction Function    
Remote SP Function    
24 V DC Loop Power Supply Function  
Heater Break Alarm Function  
(Standard type)

(Standard type)

type or
cooling type)

type or
cooling type)
Ladder Sequence Function (Number of max. steps) ✓(1000) ✓(500) ✓(500) ✓(300) ✓(300)
Other specifications Power Supply AC100 V to 240 V
AC/DC 24 V
Dust and waterproof Level of Front Panel NEMA4 *1 (IP66) NEMA4 *1 (IP66) NEMA4 *1 (IP66) NEMA4 *1 (IP66) NEMA4 *1 (IP66)
Configuration Tool Via Light-loader Communication
Via Maintenance Port
Via RS-485/Ethernet
✓/✓ ✓/✓ ✓/- ✓/✓ ✓/-

The table above includes specifications of the standard models only.
* 1: Hose down test only.

Input Range

Input type  
TC K, J, T, B, S, R, N, E, L, U, W
PL-2, PR20-40, W97Re3-W75Re25
RTD JPt100, Pt100
DC Voltage 0.4 to 2.0 V, 1.0 to 5.0 V, 0.0 to 2.0 V, 0 to 10 V, -10 to 20 mV, 0 to 100 mV
DC Current 4 to 20 mA, 0 to 20 mA



With advances in process automation comes a greater need for level measurement and control. As pressure on at the bottom surface of a liquid is proportional to the height of the liquid's surface, you can measure pressure using a differential pressure transmitter to detect the level of the liquid, acquire the data on the UT75A Digital Indicating Controller, and use the measurements to control the tank level.


Adding the CP calculation option to the advanced UT75A Digital Indicating Controller enables CP (Carbon Potential) control. CP calculation can be carried out with just one line of a UT75A ladder program.

Yes, with a ladder program. The model that supports this is the UT75A. You can use up to 3 moving average (MAV) calculations.
No, there is no conversion tool, but note that custom calculations can be replaced with ladder sequence programs. See (TI 05P01B41-03EN): “Conversion Table of UT750 Custom Computation into UT75A Ladder Program.” ...
When the input switches, the controller tracks the PV and suppresses sudden control output changes (bumpless).
I want to use 2 communication systems.
You can install 1 system from Ethernet/CC-Link/DeviceNet/PROFIBUS-DP/RS-485 on the UT75A, UT55A, UP55A, plus an additional system of RS-485. Specify these when ordering.
Yes. The communication protocol is the same, but note the difference below. You can also install two systems for use with separate protocols. The maximum speed of RS485 communication using the 2nd digit of the specification code is 19.2 kbps. The UT5...
Check whether the input on the primary loop is normal.If the input is abnormal, the unit won't switch to cascade mode.
First, set the secondary controller to AUTO operation (CAS goes out), then auto-tune that controller. Next, place it in the cascade state (CAS lights), then auto-tune the primary controller.
If you won't use the OUT and OUT2 terminal relay contacts for control output or some other purpose, you can use these models. UT55A heating/cooling model, UT57A 2 loop model For a program controller, the UP55A heating/cooling model   ...
Yes. Perform correction on A.BS of each input item.
Yes, by using the following alarm types. Analog input PV upper-limit alarm Analog input PV lower-limit alarm Analog input RSP upper-limit alarm Analog input RSP lower-limit alarm Analog input AIN2 upper-limit alarm Analog input AIN2 lower-lim...
This is supported on the UT75A, UT55A, UT52A, UP55A, and UM33A by using the 10-segment linearizer function.
Try the broken line function. That function comes with the UT52A, UT55A, UT75A, UP55A, and UM33A.
Yes, the UT75A + LL50A setting software (sold separately) can handle that.
There are three models: the UT75A and UT55A Digital Indicating Controllers, and the UP55A Programmable Controller.
Can I set up 4 alarm relay outputs?
If you don't need to use the control relay output, you can use it as an alarm relay output. Adding that to the standard-equipped 3 alarm relay outputs gives you 4 outputs.
The Ethernet setting switch is designed to enable Ethernet related parameter settings. Setting the parameter to ENTRY "1" enables the parity, IP address, subnet mask, default gateway, and port number settings. When you set this parameter to...
This means that each unit can be accessed via Ethernet from up to 2 locations at once.
As for individually writing parameters via CC-Link, changing OUT area values constitutes a write request. In your case, since the OUT area value hasn't changed from the previous value, the SP value is notoverwritten. As a fix, periodically copy t...
Use profile number 0. You can also use CCLink even if you delete the parameter assignments of Modbus slave 2 from the user profile.
RUN/STOP is set to contact input DI2 by default, and takes precedence over communication. Set S/R to OFF with DI.SL.
Reference OUT_L1 (process monitoring → process data).
If not using relay contact output for control, you can use it as a 4th alarm. This alarm would be the C contact type, therefore by connecting it to the N.C. (normal close) side you can use it as an alarm terminal. Note that when changing the basic sp...
You can change it if it is in a user profile (profile no. 0).To create a user profile, use the LL50A network profile tool.
It allows communication with RS-485 compatible UTAdvanced series instruments via CC-Link. It allows acquiring data from downstream controllers that do not have CC-Link communication, and writing parameters.
The output is restricted to a lower limit of 3.2 mA (-5%) and an upper limit of 20.8 mA (105%), but only when the transmission output scale RTH and RTL settings are the same as the PV input range.
Open registers for the number of proprietary stations per unit. For example, if there are 3 CC-Link Ver. 1 stations are occupied, the bit area occupies 96 bits per station and a word area of 12 words per station. If the refresh device of the word are...
If a control relay output (C contact) is unused, you can use it for alarms.
See the UTAdvanced Series Communication Interface (RS-485, Ethernet) User's Manual.
No, a UT100 series instrument cannot connect. Only other UTAdvanced series instruments can connect.
The alarm setting values from local are carried over.
You can do this by assigning a user function key Fn, F1, or F2* (within the KEY setup parameter). * Depending on the model (UT75A, UT55A, UT52A, UT35A, UT32A)
If you connect a shunt resistance to the input terminal of the receiving side meter, you can input it as voltage. For example, if you connect a 250 Ω shunt resistance to 4–20 mA output, it's 1–5 V. Make the resistor, including t...
Proportional band P has data of up to 1 decimal point. By contrast, communication data has no decimal point. If you want to write 100.0% to P, send 1000. For differential and integral time, the data has no decimal point.
b.out indicates a burnout on the measurement input. It appears when measurement input wiring is disconnected. Check the sensor and wiring.
Yes. Data in D register number D2005 is the valve opening value. Note that with a position proportional controller, D2006 is the PID computed value.
BR is the communication speed for CC-Link. BPS is the communication speed for the Modbus master function (RS485).
When writing individual parameters via CC-Link communication, if the data values to write are not different from the existing ones, overwriting of the values does not occur. If you write all parameters by individual communication address and the valu...
When the writing flag (RX1) is ON, the next write process can't proceed. Make sure the writing flag (RX1) is OFF before performing a write process.
If outside of the parameter setting range, data is not written.
No. Only the conventional CC-Link Ver. 1.1 or 2.0 standards are supported.
Autotuning is performed when you turn AT_L1 in the OUT area to ON (= set to 1). Please make sure that AT_L1 in the OUT area turns OFF (= set to 0) after autotuning is finished.
Communication itself is available in either Remote or Local mode. Switching to Remote mode is for overwriting r.SP from an external device.
Use a current generator with a SINK function (transmitter simulation).
On the cascade primary controller, if there is no secondary SP information, when you switch from AUTO to cascade on the cascade secondary controller, the secondary settings change abruptly, so control is interrupted. To avoid this, in advance, send t...
The display is blank if you turn ON the power while a a dedicated LL50A cable is plugged into the maintenance port. Try removing the cable and restarting.
I can't find a parameter I want to set.
Please see the parameter map for your specific model. UTAdvanced Series Parameter Maps and Lists
In the case of the difference lower limit alarm, the alarm setting is a negative value. For example, you need to set it to "-5°C."
Yes. Use a UT link module for the FA-M3, and use PC link communications (RS-485) for the temperature controller communication protocol selection.
Program changes for reading PV and OUT, writing SP, and other basic parameters are not necessary. There are registers and relays that support the GREEN series. For details see the UTAdvanced series communication interface (RS-485, Ethernet) user'...
Generally you should create programs in "user ladder" mode. If needed, you can rewrite the input ladder and output ladder portions.
The DATA register uses a 4-byte floating point number, therefore it displays a lot of digits. Try using the K or P registers, since they handle 2-byte integer data.
Can I use analog input in computations?
You can use it in ladder programs. On the UT55A, you can acquire up to 4 analog inputs.
Variable parameters P01-P10 can be rewritten via communication. You'll need to use the variable parameters as constants.
On the LL50A, change the system data's ladder sequence function from USE to DON'T USE. If not using the LL50A, initialize the main unit.
Yes. Use the PON flag on contact B.
It won't start while the system data or parameter setting screen is displayed. Close those screens and restart.
Check the operation of the program on the LL50A ladder program monitor.
The comparison commands of the digital indicating controllers (UT55A/UT52A/UT35A/UT32A) and program controllers (UP55A/UP35A) compare integers (rounded to the nearest decimal). If making comparisons that include decimals, first multiply the necessary...
For contacts that have duplicated functions, it is necessary to turn them OFF on the setup parameter side.
Please see the document below. It is an example of wiring and settings for pH control using the Quick Setup function. Affected models: Standard UT52A/UT55A models (if there are 2 types of chemicals, select the heating/cooling model) Setup procedure,...
Please see the document below. It is an example of wiring and settings for controlling electric furnace temperature with a thyristor using the Quick Setup function. Setup procedure, "UTAdvanced Quick Setting (Controlling Furnace Temperature with...
Please see the document below. It is an example of wiring and settings for controlling electric furnace temperature with solid state relays using the Quick Setup function. Setup procedure, "UTAdvanced Quick Setting (Controlling Furnace Temperatu...
Please see the document below. It is an example of wiring and settings to control flow with inverters using the Quick Setup function. Setup procedure, "UTAdvanced Quick Setting (Controlling Flow with Inverters)" ...
Please see the document below. It is an example of wiring and settings for tank level ON/OFF control using the Quick Setup function. Setup procedure, "UTAdvanced Quick Setting (Controlling Tank Level ON-OFF)" ...
Please see the document below. It is an example of wiring and settings for tank level proportional control using the Quick Setup function. Setup procedure, "UTAdvanced Quick Setting (Controlling Tank Level Proportion)" ...
Please see the document below. It is an example of wiring and settings for tank pressure control using the Quick Setup function. Setup procedure, "UTAdvanced Quick Setting (Controlling Tank Pressure)" ...
Yes, if using a UTAdvanced series instrument with the RS-485 communication option. Set the RS-485 protocol on the main unit to 8 (MBRTU: Modbus RTU). The initial value is 8. Select RS-485 in the LL50A communication execution screen, and make the comm...
If the LL50A's display setting is not PRO, some parameters won't display. Change the LL50A's display parameter as follows: Display > Parameter > Display level > Professional. The LL50A's display level must be set separately f...
You can display and acquire PV, SP, and OUT values as trend data. The trend data you acquire can be saved as a CSV file.
Yes. Use the SCAL ladder program command.
It is 1/20000. That is equivalent to approximately 14.5 bits.
Please see the document below. It is an example of wiring and settings for tank temperature control using the Quick Setup function. Setup procedure, "UTAdvanced Quick Setting (Controlling Tank Temperature)" ...
Please see the document below. It is an example of wiring and settings for controlling furnace temperature with a motorized valve using the Quick Setup function. Setup procedure, "UTAdvanced Quick Setting (Controlling Furnace Temperature with a ...
Please see the document below. It is an example of wiring and settings for controlling heat exchanger temperature using the Quick Setup function. Setup procedure, "UTAdvanced Quick Setting (Controlling Heat Exchange Temperature)" ...
Yes. The SP ramp up (UPR)/SP ramp down (DNR) function supports changing the SP value with the UT55A front panel buttons or remotely.
If you register the A1 and A2 parameters (for setting alarms 1 and 2) to the select screen, you can display the alarm 1 and 2 settings simply by pressing the DISPLAY key repeatedly. Set the CS1 and CS2 select screen parameters to "2504" and...
Yes, the output signal can be reversed. In the setup parameter OUT menu, set the OU.A parameter to "20–4."
How can I enter initial settings?
Please see an operation guide. Controller operation guides are available for standard and detailed models. (Ex.: UT55A-000-01-00 is a standard model, and UT55A-NNN-01-AN is an detailed model). Note that you can refer to the user's manual for any ...
If OVER is displayed, the PV value will be 105% of the measurement range. The control output will be the result that is calculated using this PV value. On a -OVER, the PV value is calculated as -5% of the measurement range.
The controller's operation may be set to START/MAN. Check the controller operation indicator on the front panel.
There might be breakage in a line. Check input wiring and sensors.If the input is restored, B.OUT will be cleared automatically.
(1) Check the wiring: In MAN mode, set OUT display. Use the UP and DOWN keys to confirm operation of the control valve, and that the OUT value changes. The UP key operates the normal rotation side relay, and the DOWN key operates the reverse rotation...
Is a terminal cover included?
The UT52A, UT55A, UP55A, and UT75A come standard with terminal covers. For the UT32A, UT35A, UP35A, UP32A, and UM33A, specify the /CV option when order on or after May 31, 2015. They are also sold separately. Models: UTAP001UT75A, UT55A, UT35A, UP55A...
In this case, 20 mA is the minimum value of PV input, and 4 mA is the maximum. In the setup parameter PV menu, set RH=4.00 and RL=20.00 (the input range maximum and minimum values). For the PV input scale max, min, and decimal place, set SH=0, SL=-10...
Per the metering law, in Japan you can only use °C. For customers who require overseas-specification products that can display Fahrenheit for embedding in a device exported outside of Japan, please contact your dealer or Yokogawa representative. ...
The green numbers in the upper left part of the SP display are the SP numbers. If you register PID numbers in the select screen, you can display them in the SP display area (in orange). Register PIDN_L1_1 under Setup parameters > CSEL > CS1. ...
Check the following. Is the control type (CNT) ON/OFF, or 2 position 2 stage control?--> If so, change it to something other than that. Is the STOP lamp lit? --> Start operation (RUN). Is the MAN lamp lit? --> Set it to AUTO.   ...
Check the operation mode and communication protocol. If the operation mode is Remote (REM lights) and it's set to coordinated (PSL=CO-S), an error will occur if there is no wiring.
The UT's voltage pulse specifications are: ON voltage 12 VDC or more; load resistance 600 Ω or more; ON voltage 0.1 VDC or less. For example, in the case of the Omron G3PH (operating voltage DC4-30 V, input current 5 mA or less), up to 4 un...
You can switch the output at about ±0.25% of the input range relative to the set point.
At the time of shipment from the factory, the PID display is assigned to the Fn key on the UT front panel. If you press the Fn key, the currently used P (proportional band) is displayed. You can press the DOWN arrow key to check other items.
Try the overshoot suppression function (super function). Turn on SC: Operation parameter > TUNE > SC
The common for all GREEN series alarm relay outputs are shared. In the UTAdvanced series, each alarm relay output has its own common. If used the same way, use external wiring to connect common to common.
By factory default settings, the PID number is linked to the SP number. You can change the setting with the zone PID selection parameter (setup parameter CTL > ZON).
By factory default setting, the alarm function still works when operation is stopped (STOP). You can change the setting by using the alarm mode parameter (operation parameter ALRM > AMD).
What is the alarm standby function?
Standby means that even when an alarm condition occurs it is ignored and the alarm stays off until the alarm condition ends. When the signal enters a non-alarm region, standby mode ends. Standby works in the following situation. When powering on ...
They are set with the same industrial quantities as the input units.
Yes, as a percentage of the PV input range span or output span.
For communication errors, the left side decimal point of the symbol display on the main unit blinks. If the SD or RD indicators light on upstream devices, check whether both are blinking.
You can specify PID parameter groups for each SP number. Each PID parameter group includes PID, output limiter, hysteresis, and other items.
For controllers, the status detection minimum hold time is the control interval + 50 ms. Also, for indicating alarms, it's the input sampling interval + 50 ms.
It's time proportional PID. That means that in addition to relay output, it can support TRIAC and voltage output. With time proportional output, control calculation result is output using the pulse width of an ON/OFF signal proportional to time. ...
The UTAdvanced series is not a CCC standard scope. Since it has acquired the GB standard, it can be used in China.
You can do this with the AMD alarm mode settings (within the ALRM operation parameter). 0: Alarm always active 1: Alarm not active during operation stop 2: Alarm not active during operation stop or manual operation
Set alarm types AL1–4 or 8 (ALRM operation parameter) to
Yes, set parameter AL1.S (AL1 function select) to 4529.
Use a relay that supports miniscule currents. The minimum ON current of a contact input (DI) is approximately 1 mA.
By turning the OLMT output limiter switch OFF, the output limiter is disabled during manual operation.
Check whether the MAN lamp is lit. If it is, control output will not change. Press the A/M key to switch to AUTO.
Try the PV tracking function (PVT=ON). This function is useful for preventing sudden changes in the PV value. When operation starts, the PVT starts by matching SP to PV, and then uses an SP slope function (TMU, UPR, DNR) to gradually return SP to the...
Check the cycle time (CT) setting. For voltage output, try a cycle time setting of around 1 to 5 seconds.
It appears when the controller's operation mode is RUN and MAN.
Choose PC link communication (sum check enabled or none). Please also refer to the Mitsubishi Touch Panel GOT catalog and user's manual.
Perform tuning with these reference values: P=150 to 200, I=10 to 20, D=OFF.
Perform tuning with these reference values: P=150 to 200, I=10 to 20, D=OFF.
Try proportional control. Perform tuning with these reference values: P=10%, I=OFF.D=OFF, MR=0%.
Yes. Set the following: IN=1-5V, RH=1.000, RL=5.000, SDP=2, SH=0.00, SL=-10.00.
Per factory parameter settings, the EV lamp on the UT and UM is assigned to alarms, and may light depending on the measured input (PV) and setting values. Configure your EV lamp and alarm type settings to match your operating conditions.
In your ladder program, use variable register P01 and others, and write the P01 value via communication. Then do a MOV of the P01 data to the tracking input value (TRK_CTL).
“b.out” on the PV display indicates a break in the input. Check whether the signal from the sensor is getting through. Also, to narrow down the cause, you can short the input terminal of the UT itself, then if the UT's input is normal...
At DC24 V: Approximately 17 A, 1.5 ms At AC100 V: Approximately 4.5 A, 3 ms At AC240 V: Approximately 11 A, 3 ms
Per the specifications, the accuracy of type K at 0°C or higher is ±0.1% ±1 digit. The measuring range in this case is that of the selected input type, -270.0 to 1000.0. You can calculate the accuracy as follows. ±0.1% of 127...
It is approximately 0.16 mA.
Check the key lock. If you see the R.SP display, in Remote mode (REM), that means SP is being set by an external (upstream, etc.) device and cannot be changed.
Yes. The read registers will be control output D7621 (OUT_OUT) and transmission output D7624 (OUT_RET). Note that these registers are for data -1500 to 31500 (equivalent to -5.0% to 105%).
Yes. The data will be -1500–31500. For the OUT terminal output, D7621(OUT_OUT) For the RET terminal output, D7624(RET_RET) For the OUT2 terminal output, D7623(OUT_OUT2L)  
Yes, by using the message function. This function assigns messages that have been registered in advance to the PV value display section, and displays them based on contact input ON/OFF states. Setting example: MG1 = 4353
This function operates during P and PD control (when integral time I = OFF). The manual reset value is the output value when PV=SP.
Q: I'm connecting a UT with CC-Link communication to another downstream UT via RS485 communication (Modbus master function). However, the RS485 communication terminal of the UT with CC-Link communication is a 2-wire system, and that of the other ...
Make the UP the parent station of two UT child stations and run the coordinated communication.
Yes. Set the DR (direct/reverse operation switching) parameter of the PID item to DIR (direct operation).
When you turn ON the power, it shows up on the self-diagnostic screen that appears for a few seconds. The 3-digit number in the SP display section is the basic suffix code. (Ex.) For the UT55A-210-01-00, the number "210" appears. ...
You can do this with the SET/ENT key system. Set MAN.T to ST.ET.
Select the type that is closest to the temperature range span that you are using.
You cannot apply an external voltage. You can connect either a no-voltage contact or a transistor contact.
For analog output of calculated results to the OUT terminal, set the output selection type OT to 00.00 and the transmission output type 01RS to OUT1.
For analog output of calculated results to the RET terminal, set the transmission output type RTS to OUT1.
For analog output of calculated results to the OUT2 terminal, set the first two digits of the output selection type OT to 00, and the transmission output type 02RS to OUT1.
You can do this with the pattern 2 transmission function. With the program pattern 2 transmission function, you can create and transmit program patterns at the same time, aside from program patterns used in control.
65 mm. For details, see the specifications of individual models.
Yes. Assign an I relay to the DO parameter.
Yes, by using PID switching. Generally, you set heating control to reverse action and cooling control to direct action.
Yes, as long as the total input and wiring resistance of the connected instruments is 600 Ω or less.
Do you sell terminal covers?
Yes. Model: UTAP001 Supports: UT75A, UT55A, UT35A, UP55A, UT35A Model: UTAP002 Supports: UT52A, UT32A, UP32A, UM33A
Not with parameter settings, but you can do this with a ladder program.
Not with parameter settings, but you can do this with a ladder program.
No, use 1 contact per input. If you connect multiple inputs, when you turn OFF the UT, the impedance lowers and mis-operation can result.
No, it only comes in white.
It’s from U-RD. Please purchase them from our dealers.
For a power failure of approximately 5 seconds or more, you can do this with the restart mode R.MD setting. For power failures of less than approximately 5 seconds, the control operation prior to the power failure continues. ...
You can use this with suffix codes /LP, /L1, /LCH, /L4, and /LC4. For wiring to a 2-wire transmitter, the controller is equipped with an insulated sensor power supply (21.6 to 28.0 VDC). ...
As an example, we describe how to use Control relay as Alarm output 4 (Deviation low limit). 1. Setting Setup Parameter   1-1. Set OT(Output type selection) to other than OT=00.03        ex) OT=00.02 (Cur...
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The split computation output function is useful for coordinated control of multiple operating units that perform actions such as switching between warm and cold water. The characteristics of split computation output are V and parallel.
The UT55A, UT52A, and UT75A indicating controllers. For program controllers, the UP55A is available. See the Product Finder or the specifications of individual products. ...
Sample PI control performs PI control for a certain time, and then performs intermittent output to maintain control output for a certain time. This control is useful for processes with long dead times where the results of the control output are not q...
Try these steps.  You don’t have to create new data. Use the conversion tool. Write the converted file to the UTA main unit (with the CC-Link option). Do an “upload all” from the main unit. Manually configure only the CC-...
Yes. You have to select CC-Link communications in the basic specification code, so check the model.
The UTAdvanced series can input TC, RTD, standard signal, DC voltage, and DC current. For the types and ranges of thermocouples and RTDs, see the universal input specifications in the general specifications (GS) of the specific product. Visit Library...
Yes, you can use a UTAdvanced series ladder program.  Forward PLC data to the P01 UTAdvanced variable parameter. That data is used for the PV value in the ladder program.   ...
Yes. Refer to “Models and Suffix Codes” in the general specifications, and specify option suffix code /DC. Visit the Library to search for and download the general specifications (GS). ...
UT75A: 20, UT55A/UT52A: 8, UT35A/UT32A: 4. See the UTAdvanced catalog, “Product Line-up.”
For the types and ranges of thermocouples see “Universal Input Specifications” in the general specifications (GS) of the specific product.
Position proportional control receives a valve opening feedback signal and displays it as control output value (OUT value). Therefore, if the valve isn’t actually working, the control output value will not change. Check that the feedback signal...
In time proportional output, the control computation result is output in the form of an on/off signal pulse width proportional to the time. The pulse width is calculated as follows with the cycle time (control output cycle) at 100%. Control output pu...
Check whether the operating mode is STOP. Whether in AUTO or MAN mode, only preset output occurs if in the STOP status.
Yes. Confirm that the root mean square (RMS) voltage of the UPS output is within the UTAdvanced’s power supply voltage range specifications. 
/LP is a power supply for 24 VDC sensors. For specifications, see the general specifications of the specific instrument.
By factory default, STOP/RUN switching is assigned to contact input. Therefore the S.R parameter is not displayed. To display the parameter, disable the STOP/RUN switching function that is assigned to contact input. Steps: Hold down the LEFT ARROW + ...
If the model or suffix code is changed, the display language code becomes “-1.” To set the display language code to “-0,” after converting data, download parameters using LL50A Parameter Setting software on a unit whose displa...
See chapter 4, “Conversion Error” in TI 05A03A01-02EN “GREEN to UTAdvanced Conversion Tool Operation Guide.”
No, you have to purchase LL50A with the cable and adapter as a set.
Autotuning forces the output to alternate between 0 and 100% of the SP 2.5 times, and then determines the PID from the amplitude of the measured vales. If the heat retention of the furnace is good and changes are gentle, autotuning may take some time...
What is the alarm latch function?
Once an alarm has occurred (alarm output ON), the alarm latch function maintains the alarm output continuously (leaves alarm output ON) until the alarm latch clear command. 
Yes, you can use them with the UT and UP series. A ladder sequence function comes standard with the UTAdvanced series digital indicating controllers (UT or UP). To create ladder programs, use LL50A Parameter Setting software (sold separately). For de...
UT75A: 16, UT55A/UT52A: 8, UT35A/UT32A: 4, UP55A: 8, UP35A/UP32A: 4 See the UTAdvanced catalog, “Product Line-up.”
What is a parameter display level?
Parameter display level limits the parameters displayed according to the operator’s intended use. The three levels are EASY, STD (standard), and PRO.
What does zone PID mean?
Zone PID is a function that switches the PID group parameters per the PV or SP value. This is useful for a reactor in which the chemical reaction gain changes according to the temperature.
Position proportional control is a method of control that involves monitoring the control output and the control valve feedback signal, and maintaining a constant match between the valve position and the control output.
See IM 05P05A01-02EN, “LL50A Parameter Setting Software.” ...
Yes, you can protect it with a unique user password.
With some exceptions, retransmission output comes standard. See the UTAdvanced catalog, “Product Line-up.”
What is peer-to-peer communication?
Peer-to-peer communication is a function that uses RS485 communication to send and receive mutual process data and other information, and share the data. You must create a ladder program on the LL50A parameter setting software.
See TI 05P01A01-90EN, “Preventative Maintenance of UTAdvanced series.”
The part number for the entire series is L4502TP. It comes in a set of 2.


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