UT321 Digital Indicating Controller (DISCONTINUED)

Notice: This product was discontinued on Jan 1, 2010. See this replacement product:

Model: UT321 Digital Indicating Controller

Once input is set, IN is not displayed when you turn the power ON.
Yes. The selection in the OT=0 to 3 setting in the setup parameters will be 1 output.
What is the delay timer?
(ns-faq-green-9074-term)
This is a function in which output occurs a specified time after an alarm set point is exceeded. If you clear the alarm point during operation of the timer, the timer is reset.
When switching with contacts, communication cannot be used.
This function supplies power to 2-wire transmitters. It differs depending on the specifications of the transmitter, but the input accepts 100 Ω resistors. 100 Ω resistor (model: X010-100-2, sold seperately)
Yes, if it is a heating/cooling type.
Check whether you can output manually. If not, check wether OL (cooling output limiter)=100%.
I can't switch the SP.
(ns-faq-green-9053-spec)
Check whether you are trying to switch it via communication, or whether it is the zone PID.
Check that the LL parameter is ON (LL=ON). If you can't perform front panel communications even if LL=ON, check whether you can communicate using the back panel terminal. If you can, it may be noise. Remove the communication lines....
We apologize for this. These parameters cannot be set using the tool (both terminal and front panel communications) due to the specifications of the controller main unit.
The DO206 items are used when in cascade control mode. For other modes, use DO201.
Check whether the LL parameter on the controller is ON. If using RS-485 communication, turn it OFF. If it is already OFF, check the following. If front panel communication, ON If rear panel communication, OFF If it is already OFF, check the followin...
In the controller specifications, communication and LOCK parameters cannot be set with the LL100/LL200.
There is no control output.
(ns-faq-green-9085-spec)
Check whether MAN operation (manual) is selected for the output.
Output stops when the status is STOP.
(ns-faq-green-9031-spec)
When RET=1 or 2, the STOP has no effect.
Set the following: P=100, I=D=OFF, DR=DIR (direct action), MR=0, SP=0.
These are used when 2-wire transmitters are used in the field. They provide cost savings since they do not need to be purchased separately. 24 V (21.6–28.0 VDC, 30 mA MAX) sensor power supplies can be specified with the following models: UT551,...
Can I perform CC-Link communication?
(ns-faq-green-9035-connect)
Yes, by using the Yokogawa NC210 converter.
With the UT300 series, only use 1PID. With UT400/500/700 models, the PID used just prior to switching to remote input is used. When using SP switching during remote input, only the PID switches.
What are the PID switching methods?
(ns-faq-green-9041-spec)
There is a zone, contact, and parameter switching method.
How many PID groups can be used?
(ns-faq-green-9040-spec)
4 groups for the UT300 series, and 8 groups for the UT400/500/700 series.
Why don't PID items appear?
(ns-faq-green-9044-spec)
They don't appear with OT=3 ON/OFF control.
DO215, used for communication, is not backed up.
The UT300/400/500/700 series, and the UP350/351/550/750. However, the LL200 custom computation function is only compatible with the UT750/UP750.
If you set + dead zone in the settings, you can get an area where no outputs occur. If you set - dead zone, you can get an area where both outputs occur at the same time.
Set them in the order, Alarm type → Alarm setting values. They will also not be displayed if you select an alarm for which no value is set.
Set both item P on the heating side and item Pc on the cooling side to 0.0.
It depends on the model. The following lists the readable registers by model. UT100 series: D0001–D0009 UT300 series: D0001–D0008 UT400/UT500/UT700 series: D0001–D0025 UP350: D0001–D0008 UP550/UP750: D0001–D0025 ...
The are set with a real number. For temperature, it is set in degrees Celsius.
The PV value register is read-only, so you can't write to it.
Check that the operating parameters UPR and DNR are both OFF.
The display is blank.
(ns-faq-green-9082-spec)
Check whether the wiring to the power supply terminal is correct. If only the LCD on the UT/UP700 does not display, a custom computation may be set for no display. If the PV display is also blank, this may indicate product failure. Please contact you...
PCBs (polychlorinated biphenyl) were banned from manufacturing and imports in 1975. The GREEN series began to be manufactured in 1997, and do not include PCBs.
This is a limit on the number of times you can write to the element used (EEP-ROM).
The output is 0% if there is a hardware failure such as an internal microprocessor.
There are 2 types of output available, FAIL and "failure diagnosis."
What are energize/de-energize alarms?
(ns-faq-green-9076-term)
For energize alarms, ON contact results when an alarm occurs. For de-energize alarms, OFF contact results when an alarm occurs. Note that OFF contact also results when the power fails.
The sensor wire on the input side might be broken or disconnected.
No. When an alarm occurs, it automatically recovers if values enter the normal range.
Yes, but if you change some parameters, others will be initialized. We do not recommend that you make changes while in operation.
These cannot be set when in Custom Computation mode.
How do I change the input type?
(ns-faq-green-9014-spec)
If you change the input type, parameters will be initialized. We do not recommend that you make changes while in operation.
If the operation mode is STOP or MAN, they are not displayed.
Yes, you can use the GREEN-UTAdvanced parameter data conversion tool (available as free download). Using the LL100/LL200 parameter setting tool, save the GREEN series parameters to a file, convert them using the conversion tool, then apply the settin...
Do Green series controllers support Ethernet?
(ns-faq-green-9009-connect)
Yes. This requires an RS-485/Ethernet converter such as VJET. The controller must also have a communication option.
What are direct and reverse action?
(ns-faq-green-9017-term)
Generally, reverse action means heating control and direct action means cooling control. When output is reverse action, output is ON during PVSP.
No, because the Ethernet module does not have a Master function.
What protocol is used?
(ns-faq-green-9037-connect)
The protocol used is ladder communication.
Yes, the Auto tuning function.
Sample programs and dedicated communication materials are available for MELSEC-A/MELSEC-Q.
Almost all items can be accessed, including PV reading, SP writing, and PID setting.
600 Ω.
Yes, MELSEC-A, MELSEC-Q, and MELSEC-FX.
There is no current input range.
(ns-faq-green-9018-spec)
Use a resistor to input current as voltage. A resistor is available: X010-250-2 (250 Ω).
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. ...
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 ...
With a UP program controller or UT digital indicating controller as the parent station and multiple UT digital indicating controllers as the child stations, the children perform the same actions that are carried out on the parent. ...
Ladder communication is a protocol for communication with PLCs. Aside from Yokogawa PLCs, you can communicate with Mitsubishi MELSEC-Q/A series calculator link units (using A1SJ71UC24-R4 or A1SJ71C24-R4). ...
This is a protocol for communication with general purpose PCs and graphic panels. The UT130/UT150 can communicate with standard PCs. ...
This is a protocol for communication with general purpose PCs and graphic panels, and also the FA-M3: You can communicate with Yokogawa PLC range free controller UT link modules and serial communication modules. Also, you can easily connect with PLCs...
This is an overshoot suppression function that uses fuzzy logic. It constantly monitors deviation, and if it detects the possibility of an overshoot, it automatically changes the set point to a somewhat lower temp value (sub set point SSP). When y...
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'...
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.
Even when you expand the applicable range of the PID constant, the process states fluctuate, or response is unstable and hunting occurs (control responses fluctuate), this function is effective for stabilizing control and suppressing hunting. Normall...
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...

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