Name: Program Controller UP55A
Brand: Yokogawa
SKU: up55a

The UP55A program controller comes standard with 8 contact input (DI) terminals, but I only know 3 of the terminal numbers.What are the other 5 terminal numbers?

(ns-faq-ut-2071-connect)

You can determine the other 5 DI terminal numbers from the model code. -*2* means no. 301–306. The others (except -*4*) are no. 501–506. -*4* means 303–304, 309–310, and 503–504 are added.

At the end of UP32A/UP35A/UP55A programs, does the PIDNo. change when local is set (JC=LOCAL)?

(ns-faq-ut-2079-spec)

If you set JC=LOCAL, local operation status begins when the last segment of program operation ends. In this case, when zone PID (ZON=1,2,4) is selected, the PID group switches according to the selected zone. When segment PID (ZON=0) is selected, the ...

How do I set up output of alarm output 1 from the UP32A/UP35A/UP55A AL1 terminals (relay contact output)?

(ns-faq-ut-2082-setting)

In the setup parameter ALM menu, set the AL1.S parameter to 4353 (AL01_L1). [Supplement] 4321(ALM1) is the alarm status of ON when an alarm occurs, and OFF when normal. 4353(AL01) is the alarm status determined by applying the settings for alarm ener...

I want to check the program controller patterns from the main unit.

(ns-faq-ut-2122-setting)

With TSP, TIME, JC, and others displayed in the program pattern setting screen, you can switch between segments using the left and right arrow keys.

With a program controller, if you don't turn ON the wait function on/off 1–5 setting (parameter WT.SW1–WT.SW5), does the wait function not operate?

(ns-faq-ut-2127-spec)

That's correct. Also set the wait zone (WT.UP1–5, WT.LO1–5) and wait time (WT.TM1–5) accordingly.

With program controllers, can you do auto-tuning while programs are running?

(ns-faq-ut-2128-setting)

If you perform auto-tuning while programs are running, the program time pauses, and then resumes after auto-tuning is done. (Note that auto-tuning fluctuates the output and PV.)

With program controllers, can you change the SP while programs are running?

(ns-faq-ut-2133-setting)

If the segment setting type SEG.T (within setup parameter CTL) is TIME: segment time setting, you can temporarily change it after a hold. This is not reflected in the original program. If the segment setting type SEG.T is TM.RT: segment slope/time se...

On a program controller, can I do contact output when an operation parameter ends?

(ns-faq-ut-2134-setting)

ALn.SSet ALn function selection (within the ALM setup parameter) to a pattern end signal (where n is 1, 2, 3). Pattern end signal (1 sec):4265 Pattern end signal (3 sec):4266 Pattern end signal (5 sec):4267 * Time in parens. () is ON time ...

While a program is running, I want to judge advancing to the next segment with an operator. How can I do that?

(ns-faq-ut-2142-setting)

Set junction code JC = HOLD. With this setting, it automatically enters the HOLD state when segments switch. Use operator determination to perform the ADV (advance) operation, and then move to the next segment.

I use the UP under batch control. I want to display a message on the front panel of the UP after batch control stops.

(ns-faq-ut-2169-setting)

You can do this with the message function. For details, see section 13.1.10, "Setting Message Function" in user's manual IM 05P02C41-01EN. ...

How can I delete a segment from a UP program pattern through CC-Link communication?

(ns-faq-ut-2189-setting)

You can't delete a segment from a UP program pattern by using CC-Link communication. You'll need to delete the program pattern and then write a new one.

I want to write program patterns to the UP Program Controller via communications, but can I do that while the UP is running a program?

(ns-faq-ut-2201-connect)

No.The same is true during HOLD.

Can I use DO to transmit the pattern number currently used on the UP to an external device?

(ns-faq-ut-2216-setting)

Yes. Assign an I relay to the DO parameter.

Is remote input required on the cascade primary controller when performing cascade control with two controllers?

(ns-faq-ut-2118-setting)

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...

When switching input with 2-input switching control, doesn't the control output suddenly change (bump)?

(ns-faq-ut-2057-spec)

When the input switches, the controller tracks the PV and suppresses sudden control output changes (bumpless).

I want to use 2 communication systems.

(ns-faq-ut-2085-select)

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.

With the UT55A, UT75A, and UP55A, is there a difference between selecting RS485 communication with the 2nd digit of thesuffix code versus the 3rd digit?

(ns-faq-ut-2086-select)

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...

I'm doing cascade control. How do I do auto-tuning?

(ns-faq-ut-2103-setting)

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.

Are there controllers that can output 2 alarm relay contacts with the c contact?

(ns-faq-ut-2106-select)

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 ...

With loop control with PV switching or PV auto-selector, can I apply independent correction on each individual input?

(ns-faq-ut-2172-setting)

Yes. Perform correction on A.BS of each input item.

With loop control with PV switching or PV auto-selector, can I set alarms individually for analog values acquired on each input?

(ns-faq-ut-2173-setting)

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...

Can I use a low cut on the PV (measured value input)?

(ns-faq-ut-2186-spec)

This is supported on the UT75A, UT55A, UT52A, UP55A, and UM33A by using the 10-segment linearizer function.

I want to display he volume of a spherical tank, but is there a function that can do that?

(ns-faq-ut-2192-spec)

Try the broken line function. That function comes with the UT52A, UT55A, UT75A, UP55A, and UM33A.

I want to perform cascade control of 2 temperature inputs on a single unit. Is there a model that can do that?

(ns-faq-ut-2193-select)

Yes, the UT75A + LL50A setting software (sold separately) can handle that.

Is there a model that can have 2 ports of RS485 communication?

(ns-faq-ut-2223-select)

There are three models: the UT75A and UT55A Digital Indicating Controllers, and the UP55A Programmable Controller.

What happens to the alarm setting values when you switch from local SP to remote SP?

(ns-faq-ut-2126-spec)

The alarm setting values from local are carried over.

How can I use control relay output as an alarm relay (alarm 4)?

(ns-faq-ut-2011-setting)

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...

Can I toggle between remote and local by pressing a key?

(ns-faq-ut-2131-setting)

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)

I want to convert my old controller (GREEN series) parameter data for the UTAdvanced series. Is there a program for that?

(ns-faq-ut-2222-soft)

Yes. Software for converting your existing controller parameter data for use with the UTAdvanced series is available for download free of charge. GREEN to UTAdvanced Conversion Tool *Log-in Required ...

I used the parameter conversion tool to convert GREEN series data for the UTA series. I can’t add the CC-Link communication option code to the converted data.

(ns-faq-ut-2230-spec)

You can use the conversion tool. You don’t have to do anything after you create it. The steps are as follows: Perform the Green conversion using the conversion tool. Write the converted file to the UTA (with the CC-Link option) main unit. ...

Can I set control for power fail recovery to MAN?

(ns-faq-ut-2117-setting)

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. ...

I want to wire a 2-wire transmitter and a 24 VDC sensor power supply.

(ns-faq-ut-2119-connect)

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). ...

Can you tell me the procedure for assignment when the heater break alarm output option (suffix code /HA) is installed?

(ns-faq-ut-2015-setting)

Assignment settings are not necessary. The heater break alarm output has a dedicated output terminal.

Can I set up 4 alarm relay outputs?

(ns-faq-ut-2016-setting)

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.

With the types that have an Ethernet communication function, even if I set the Ethernet setting switch to "1," it reverts to "0."

(ns-faq-ut-2022-connect)

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...

After changing the UT's SP values from the MELSEC via CC-Link, when I change the SP value on the UT main unit, I can't change to the same value as before from the MELSEC.

(ns-faq-ut-2026-connect)

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...

With CC-Link, I write 1 to RY48 and change to MAN, and then change to AUTO using the main unit A/M key. Can you tell me how to change back to MAN again via CC-Link?

(ns-faq-ut-2027-connect)

Yes. Return RY48 to 0, and then write 1 again.

What profile number is used when using CC-Link on only 1 unit?

(ns-faq-ut-2028-connect)

Use profile number 0. You can also use CCLink even if you delete the parameter assignments of Modbus slave 2 from the user profile.

Can I switch between RUN and STOP via CC-Link?

(ns-faq-ut-2029-connect)

RUN/STOP is set to contact input DI2 by default, and takes precedence over communication. Set S/R to OFF with DI.SL.

To use valve opening in a position proportional type UT ladder program, which register should I reference?

(ns-faq-ut-2040-program)

Reference OUT_L1 (process monitoring → process data).

Can I output an alarm (close the alarm terminal) on a power failure?

(ns-faq-ut-2056-setting)

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...

Is calibration of position still required if the position proportional type feedback input is current?

(ns-faq-ut-2059-spec)

Yes. It is required.

Can I change the temperature controller profile information for CC-Link communication?

(ns-faq-ut-2068-spec)

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.

What is the Modbus master function that is added when CC-Link communication is installed?

(ns-faq-ut-2069-spec)

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.

What happens to transmission output when an input OVER occurs at 4–20 mA input (PV: 4–20 mA)?

(ns-faq-ut-2081-setting)

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.

I connect multiple UTs as CC-Link slaves. How should I assign PLC CPU registers?

(ns-faq-ut-2092-connect)

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...

Is there a C contact with alarm contact output?

(ns-faq-ut-2112-spec)

If a control relay output (C contact) is unused, you can use it for alarms.

Can you describe the register symbols in the profiles for open network communication?

(ns-faq-ut-2115-term)

See the UTAdvanced Series Communication Interface (RS-485, Ethernet) User's Manual.

Can a UT100 series instrument be connected downstream of a UTAdvanced series with CC-Link communications?

(ns-faq-ut-2125-spec)

No, a UT100 series instrument cannot connect. Only other UTAdvanced series instruments can connect.

Can I connect transmission output (current output) to a voltage input meter?

(ns-faq-ut-2135-setting)

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...

I'm writing PID settings via CC-Link communication, but when I send 100 to proportional band P, 10.0 appears on the main unit.

(ns-faq-ut-2138-setting)

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 was displayed on the controller's PV display. What does that mean?

(ns-faq-ut-2148-spec)

b.out indicates a burnout on the measurement input. It appears when measurement input wiring is disconnected. Check the sensor and wiring.

Can I read a valve opening value via communication on a position proportional controller?

(ns-faq-ut-2159-spec)

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.

Which station type should I select for the UTAdvanced series for CC-Link communication: Remote I/O, Remote Device, or Intelligent Device?

(ns-faq-ut-2164-setting)

The UTAdvanced series is a “Remote Device station.”

I purchased a unit with CC-Link communication. I'm setting up the parameters for CC-Link, and there are 2 communication speed settings, BR and BPS. Which setting should I use?

(ns-faq-ut-2166-setting)

BR is the communication speed for CC-Link. BPS is the communication speed for the Modbus master function (RS485).

Sometimes data can't be written to the "1.SP" register via CC-Link communication. What causes this?

(ns-faq-ut-2178-spec)

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...

Sometimes with CC-Link communication it stops writing data. What should I do?

(ns-faq-ut-2180-spec)

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.

What happens if I write data outside the specified range via CC-Link communication?

(ns-faq-ut-2181-spec)

If outside of the parameter setting range, data is not written.

Is there support for the "CC-Link IE" standard?

(ns-faq-ut-2182-spec)

No. Only the conventional CC-Link Ver. 1.1 or 2.0 standards are supported.

I want to perform autotuning via communication on a UT with CC-Link communication. Should I turn AT_L1 which is assigned to the OUT area in the profile to ON (=write 1)?

(ns-faq-ut-2175-program)

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.

Downstream from a UT with CC-Link communication (the Modbus master), the power to a controller connected via RS485 communication (the Modbus slave) went out. After the power to the controller was restored, communication did not restart. What should I do?

(ns-faq-ut-2179-spec)

Either set the SCAN parameter, or turn ON the rescan request flag on the PLC side.

Is the SP slope valid for remote SP values as well?

(ns-faq-ut-2210-spec)

Yes.

I have the /LP option and I’m wiring a 2 wire transmitter power supply. How can I input a simulated current signal?

(ns-faq-ut-2239-connect)

Use a current generator with a SINK function (transmitter simulation).

What is the model of the current transformer for heater current measurement used by UTAdvanced?

(ns-faq-ut-2248-spec)

Recommended CT:U-RD CTL-6-S-H: CT ratio 800, measurable current range: 0.1-80.0 Arms CTL-12L-30: CT ratio 3000, measurable current range: 0.1-180.0 Arms

How can I display the currently used PID no. on the operation screen?

(ns-faq-ut-2249-setting)

Turn OFF the U.PID parameter symbol in the setup parameter KLOC menu.

Even when I turn ON the power, nothing appears on the UT display.

(ns-faq-ut-2013-setting)

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.

(ns-faq-ut-2001-setting)

Please see the parameter map for your specific model. UTAdvanced Series Parameter Maps and Lists

I set up a difference lower limit alarm, but no alarm is output.

(ns-faq-ut-2017-setting)

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."

With the UTAdvanced ladder program function, can I use constants and other parameters in basic math functions?

(ns-faq-ut-2024-connect)

You can use the constant K and parameter P.

Are communications with the FA-M3 possible?

(ns-faq-ut-2021-connect)

Yes. Use a UT link module for the FA-M3, and use PC link communications (RS-485) for the temperature controller communication protocol selection.

Can I use an RS-485 communication program written for the GREEN series (UT300/UT400/UT500/UP300/UP500/UM300) on a UT-Advanced series instrument?

(ns-faq-ut-2025-connect)

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'...

When using the LL50A to create ladder programs, which ladder program edit mode should I use: "input ladder calculation," "output ladder calculation," or "user ladder"?

(ns-faq-ut-2030-program)

Generally you should create programs in "user ladder" mode. If needed, you can rewrite the input ladder and output ladder portions.

I'm creating ladder programs on the LL50A. I want to set input computed results to R.SP, but I see lots of digits are displayed after the decimal point of the data on the ladder monitor. Can I reduce the number of digits displayed after the decimal point?

(ns-faq-ut-2031-program)

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?

(ns-faq-ut-2032-program)

You can use it in ladder programs. On the UT55A, you can acquire up to 4 analog inputs.

Can I rewrite constants used in ladder programs via communication?

(ns-faq-ut-2033-program)

Variable parameters P01-P10 can be rewritten via communication. You'll need to use the variable parameters as constants.

Can I disable ladder programs that I used?

(ns-faq-ut-2034-setting)

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.

Can I detect when the power is turned ON?

(ns-faq-ut-2035-program)

Yes. Use the PON flag on contact B.

My LL50A ladder program monitor does not start.

(ns-faq-ut-2036-program)

It won't start while the system data or parameter setting screen is displayed. Close those screens and restart.

A ladder program that I wrote doesn't work properly.

(ns-faq-ut-2037-program)

Check the operation of the program on the LL50A ladder program monitor.

My ladder program's comparison commands don't work properly.

(ns-faq-ut-2038-program)

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...

When using contact input in ladder programs, is it necessary to turn OFF the contact function assigned to the setup parameters?

(ns-faq-ut-2039-program)

For contacts that have duplicated functions, it is necessary to turn them OFF on the setup parameter side.

Can you tell me how to wire and set up waste liquid pH control?

(ns-faq-ut-2041-setting)

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,...

I'm controlling the temperature of an electric furnace using a thyristor. How should I wire and configure this?

(ns-faq-ut-2042-setting)

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...

I'm controlling the temperature of an electric furnace using solid state relays. How should I wire and configure this?

(ns-faq-ut-2043-setting)

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...

Can you tell me how to wire and set up flow control using an inverter?

(ns-faq-ut-2044-setting)

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)" ...

I'm controlling tank level ON/OFF. How should I wire and configure this?

(ns-faq-ut-2045-setting)

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)" ...

I'm doing proportional control of tank level. How should I wire and configure this?

(ns-faq-ut-2046-setting)

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)" ...

I'm controlling tank pressure. How should I wire and configure this?

(ns-faq-ut-2047-setting)

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)" ...

With the LL50A and UTAdvanced, can I perform RS-485 communications without a dedicated cable?

(ns-faq-ut-2051-connect)

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...

How can I display parameters that aren't displayed in the LL50A parameter setting software?

(ns-faq-ut-2052-soft)

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...

Can I acquire trend data on the LL50A?

(ns-faq-ut-2053-soft)

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.

Can I switch scaling using contact input?

(ns-faq-ut-2054-program)

Yes. Use the SCAL ladder program command.

What is the resolution of control output (4–20 mADC)?

(ns-faq-ut-2055-spec)

It is 1/20000. That is equivalent to approximately 14.5 bits.

I'm controlling tank temperature. How should I wire and configure this?

(ns-faq-ut-2048-setting)

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)" ...

I'm controlling furnace temperature with a motorized valve. How should I wire and configure this?

(ns-faq-ut-2049-setting)

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 ...

I'm controlling temperature with a heat exchanger. How should I wire and configure this?

(ns-faq-ut-2050-setting)

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)" ...

Are all COM terminals for contact input connected internally?

(ns-faq-ut-2061-spec)

Yes.

Can I reverse the 4–20 mA control output and change to a 20–4 mA signal?

(ns-faq-ut-2063-spec)

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?

(ns-faq-ut-2064-setting)

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 ...

OVER was displayed on the PV (measured value) display. How will the control output operate in this case?

(ns-faq-ut-2070-spec)

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.

I initialized the controller, but no control output value is output.

(ns-faq-ut-2074-setting)

The controller's operation may be set to START/MAN. Check the controller operation indicator on the front panel.

B.OUT was displayed on the PV (measured value) display. What could be the cause of this?

(ns-faq-ut-2077-connect)

There might be breakage in a line. Check input wiring and sensors.If the input is restored, B.OUT will be cleared automatically.

There are differences between PV display values and the displays of other measuring instruments. Can I correct these?

(ns-faq-ut-2078-spec)

Yes, by using PV input bias (parameter BS).

An error occurs with position-proportional type automatic valve position adjustment (V.AT).

(ns-faq-ut-2083-setting)

(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?

(ns-faq-ut-2088-select)

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...

Can I set the PV display to -100 with 20 mA input, and to 0 with 4 mA input?

(ns-faq-ut-2089-setting)

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...

Can I switch the temperature units between°C and °F?

(ns-faq-ut-2087-spec)

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. ...

I'm doing temperature control. I did PID tuning, but the overshoots are still large and I want to suppress them. Is there a good way to do this?

(ns-faq-ut-2104-setting)

Try the overshoot suppression function (super function). Turn on SC: Operation parameter > TUNE > SC

I'm replacing my GREEN series with the UTAdvanced series. Is there anything I need to be careful of in terms of wiring?

(ns-faq-ut-2108-connect)

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.

Does the alarm function work when operation is stopped (STOP)?

(ns-faq-ut-2110-spec)

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?

(ns-faq-ut-2111-spec)

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 ...

Are the control and alarm hysteresis values set as percentages?

(ns-faq-ut-2113-setting)

They are set with the same industrial quantities as the input units.

I'm using the UP35A and UP55A. Are PV and local event hysteresis values set with percentages?

(ns-faq-ut-2114-setting)

Yes, as a percentage of the PV input range span or output span.

How can I check the RS485 communication status?

(ns-faq-ut-2116-connect)

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.

I want to set the PID, output limiter, and hysteresis for each SP number.

(ns-faq-ut-2120-setting)

You can specify PID parameter groups for each SP number. Each PID parameter group includes PID, output limiter, hysteresis, and other items.

What is the minimum hold time that contact input can detect?

(ns-faq-ut-2121-spec)

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.

Why are PID parameters set with relay output?

(ns-faq-ut-2123-spec)

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. ...

Does the UTAdvanced series support CCC and GB standards? Can it be used in China?

(ns-faq-ut-2124-spec)

The UTAdvanced series is not a CCC standard scope. Since it has acquired the GB standard, it can be used in China.

Can the alarm operation be disabled during operation stop (STOP) or manual operation (MAN)?

(ns-faq-ut-2129-setting)

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

I want to stop the lamp indicator or action for unused alarms.

(ns-faq-ut-2136-setting)

Set alarm types AL1–4 or 8 (ALRM operation parameter) to 0.0.0.00.

Can I assign heater disconnection alarm 1 to alarm 1 output (terminal no. 108-109)?

(ns-faq-ut-2137-setting)

Yes, set parameter AL1.S (AL1 function select) to 4529.

Is there a limit on the number of times you can write to the D register via communication?

(ns-faq-ut-2140-spec)

No, there is no limit.

What should I do if DI input is not accepted on relay contacts?

(ns-faq-ut-2141-spec)

Use a relay that supports miniscule currents. The minimum ON current of a contact input (DI) is approximately 1 mA.

Can I remove the output limit value restriction during manual operation?

(ns-faq-ut-2143-setting)

By turning the OLMT output limiter switch OFF, the output limiter is disabled during manual operation.

I'm controlling temperature by using voltage pulse output to operate a heater with an SSR, but I can't stop the hunting. I already performed auto-tuning.

(ns-faq-ut-2146-setting)

Check the cycle time (CT) setting. For voltage output, try a cycle time setting of around 1 to 5 seconds.

Valve calibration parameters don't appear on position proportional controllers.

(ns-faq-ut-2147-setting)

It appears when the controller's operation mode is RUN and MAN.

I'm controlling pressure. Are there PID reference values?

(ns-faq-ut-2153-setting)

Perform tuning with these reference values: P=150 to 200, I=10 to 20, D=OFF.

I'm controlling flow. Are there PID reference values?

(ns-faq-ut-2154-setting)

Perform tuning with these reference values: P=150 to 200, I=10 to 20, D=OFF.

I'm controlling flue levels. Are there PID reference values?

(ns-faq-ut-2155-setting)

Try proportional control. Perform tuning with these reference values: P=10%, I=OFF.D=OFF, MR=0%.

With 1-5 VDC input, can I make the PV display 0.00 to -10.00 kPa?

(ns-faq-ut-2156-setting)

Yes. Set the following: IN=1-5V, RH=1.000, RL=5.000, SDP=2, SH=0.00, SL=-10.00.

I want to create a ladder program that writes output tracking values via communication.

(ns-faq-ut-2158-setting)

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).

I'm using a thermocouple for the input, but "b.out" appears on the PV display. What should I check first?

(ns-faq-ut-2160-other)

“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...

Can you tell me the inrush current value of the UTA series of instrument power?

(ns-faq-ut-2162-spec)

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

Can you tell me how to get the measurement accuracy when measuring 0 to 1000°C with a type K thermocouple? I selected input type K2 (-270.0 to 1000.0).

(ns-faq-ut-2163-spec)

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...

What is the measured current during RTD input?

(ns-faq-ut-2167-spec)

It is approximately 0.16 mA.

I'm pressing SET/ENTER on the front panel keys but I can't change the SP value.

(ns-faq-ut-2171-setting)

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.

I set the UTA output to 10-segment linearizer approximation. Can the resulting output values be read via communication?

(ns-faq-ut-2177-spec)

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)

Can I make it display the alarm type when an alarm occurs?

(ns-faq-ut-2184-spec)

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

What is the MR (manual reset) function?

(ns-faq-ut-2185-spec)

This function operates during P and PD control (when integral time I = OFF). The manual reset value is the output value when PV=SP.

How to connect one UT with CC-Link communication to another downstream UT via RS485. The RS485 communication terminal of the UT with CC-Link communication is a 2-wire system, and that of the other UT is a 4-wire system.

(ns-faq-ut-2187-connect)

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 ...

I want to control the temperature of 3 zones. How should I configure it?

(ns-faq-ut-2191-select)

Make the UP the parent station of two UT child stations and run the coordinated communication.

I purchased a general type of controller. Can this control cooling?

(ns-faq-ut-2194-other)

Yes. Set the DR (direct/reverse operation switching) parameter of the PID item to DIR (direct operation).

I want to check the suffix code but I can't see the name plate. Is there another way to check it?

(ns-faq-ut-2195-setting)

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. ...

After converting the controller manual output value to a number like the SP, can I finalize it with the ENT key?

(ns-faq-ut-2196-setting)

You can do this with the SET/ENT key system. Set MAN.T to ST.ET.

I'm using the Pt100 sensor. The PV input type IN parameters include PT1, PT2, and PT3, but which should I select?

(ns-faq-ut-2197-setting)

Select the type that is closest to the temperature range span that you are using.

Can I apply a 24 VDC voltage to a contact input?

(ns-faq-ut-2198-spec)

You cannot apply an external voltage. You can connect either a no-voltage contact or a transistor contact.

I want to output the results of calculations by ladder programs with 4-20 mA on the OUT output terminal, but nothing happens.

(ns-faq-ut-2207-program)

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.

I want to output the results of calculations by ladder programs with 4-20 mA on the RET output terminal, but nothing happens.

(ns-faq-ut-2208-program)

For analog output of calculated results to the RET terminal, set the transmission output type RTS to OUT1.

I want to output the results of calculations by ladder programs with 4-20 mA on the OUT2 output terminal, but nothing happens.

(ns-faq-ut-2209-program)

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.

I want to contol pressure and temperature with a single pattern using the UP and UT.

(ns-faq-ut-2213-spec)

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.

When installing the UTAdvanced series, what is the depth in millimeters from the surface of the panel?

(ns-faq-ut-2214-spec)

65 mm. For details, see the specifications of individual models.

Can I switch heating and cooling control?

(ns-faq-ut-2218-spec)

Yes, by using PID switching. Generally, you set heating control to reverse action and cooling control to direct action.

Can I connect multiple instruments such as power controllers to a controller's analog current output?

(ns-faq-ut-2219-connect)

Yes, as long as the total input and wiring resistance of the connected instruments is 600 Ω or less.

Do you sell terminal covers?

(ns-faq-ut-2233-other)

Yes. Model: UTAP001 Supports: UT75A, UT55A, UT35A, UP55A, UT35A Model: UTAP002 Supports: UT52A, UT32A, UP32A, UM33A

Can I set it for 1 shot-only event display and contact output ON when an alarm activates?

(ns-faq-ut-2241-setting)

Not with parameter settings, but you can do this with a ladder program.

Is it possible to connect multiple contact inputs to a single relay contact?

(ns-faq-ut-2243-connect)

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.

Can I choose the color of the UTAdvanced terminal cover?

(ns-faq-ut-2246-spec)

No, it only comes in white.

Is the current transformer for heater current measurement that is used by UTAdvanced made by Yokogawa Electric?

(ns-faq-ut-2247-other)

It’s from U-RD. Please purchase them from our dealers.

What is the split computation output function? [UT52A/UT55A/UT75A/UP55A]

(ns-faq-ut-20076-term)

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.

Can you tell me where to download catalogs, specifications, user manuals, technical information, drawings, software, and CAD data?

(ns-faq-gxgp-097-other)

You can download these items from the Partner Portal member site *Log-in Required. You must register (free) to use Partner Portal.

Can I change a program pattern on the program controller while a program is running?

(ns-faq-ut-20027-setting)

The following shows conditions that can be changed during the hold operation Segment setting method（SEG.T） Segment time setting Segment ramp-rate setting Segment condition Soak Ramp Soak Ramp Hold SP ...

Can I use a program controller as a pattern setter?

(ns-faq-ut-20039-spec)

Yes. A program controller can use as a pattern setter.

Can I start a program on a program controller from the current temperature?

(ns-faq-ut-20050-setting)

Yes, by using the PV start function. Start running by Ramp-prioritized PV start (STC=RAMP) Start running by Time-prioritized PV start (STC=TIME)

Which controllers can perform cascade control?

(ns-faq-ut-20059-select)

The UT55A, UT52A, and UT75A indicating controllers. For program controllers, the UP55A is available. See the Product Finder or the specifications of individual products. ...

A conversion error is displayed on the GREEN to UTAdvanced Conversion tool.

(ns-faq-ut-20048-setting)

See chapter 4, “Conversion Error” in TI 05A03A01-02EN “GREEN to UTAdvanced Conversion Tool Operation Guide.”

I installed it in a furnace, but autotuning never ends.

(ns-faq-ut-20004-other)

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?

(ns-faq-ut-20013-term)

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.

Can you use ladder programs with the UTAdvanced series?

(ns-faq-ut-20031-spec)

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...

How many number of PID parameter groups can be used?

(ns-faq-ut-20057-spec)

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?

(ns-faq-ut-20064-term)

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?

(ns-faq-ut-20069-term)

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.

What is position proportional control?

(ns-faq-ut-20075-term)

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.

How do I create and configure ladder sequence programs?

(ns-faq-ut-20053-setting)

See IM 05P05A01-02EN, “LL50A Parameter Setting Software.” ...

Can I apply protection to a ladder sequence program created on LL50A?

(ns-faq-ut-20000-setting)

Yes, you can protect it with a unique user password.

Is retransmission output (auxiliary output) available?

(ns-faq-ut-20055-spec)

With some exceptions, retransmission output comes standard. See the UTAdvanced catalog, “Product Line-up.”

What is peer-to-peer communication?

(ns-faq-ut-20074-term)

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.

Can you tell me about the lifespan and maintenance of the UTAdvanced series?

(ns-faq-ut-20042-spec)

See TI 05P01A01-90EN, “Preventative Maintenance of UTAdvanced series.”

What is the model (part number) of the UTAdvanced series mounting brackets?

(ns-faq-ut-20030-select)

The part number for the entire series is L4502TP. It comes in a set of 2.

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