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<Toc>

<4. Troubleshooting and Maintenance>

4-9

IM 05D01C12-41E

4th Edition: May 31, 2006-00

4.2.5

Replacing Control Output Relays

This subsection describes how to replace the control output relays.

Since inspection is needed in case parts are replacement will be carried out by a
YOKOGAWA engineer or an engineer certified by YOKOGAWA. When replacement is
required, contact your nearest YOKOGAWA dealer.

CAUTION

Always turn off the power before starting the work in order to avoid electric shock.

Do not pull out the internal unit for any other purpose other than to replace the control
output relays.

1.

Insert a flat-blade screwdriver (tip width of 6 mm is recommended) into the opening with
the tip in parallel with the front panel, and then turn the screwdriver gently. Take this
procedure to four openings 1, 2, 3 and 4 (see the figure below) on the upper and lower
parts of the bezel, in order.
The bezel slightly moves forward from the housing.

1

2

4

3

2.

Push up the center of the bottom gasket of bezel by a finger to release the latch.

Center of the bottom gasket

Panel

View from the bottom

Latch (invisible in the panel)

3.

Insert a flat-blade screwdriver into the four openings and flip the tip forward again to
move the bezel more forward.

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Summary of Contents for NEW GREEN SERIES

Page 1: ...User s Manual IM 05D01C12 41E Models UT450 UT420 Digital Indicating Controllers User s Manual IM 05D01C12 41E 4th Edition ...

Page 2: ...Blank Page ...

Page 3: ... for recording User Settings Regarding This User s Manual 1 This manual should be provided to the end user Keep an extra copy or copies of the manual in a safe place 2 Read this manual carefully to gain a thorough understanding of how to operate this product before starting operation 3 This manual describes the functions of this product Yokogawa Electric Corporation hereinafter simply referred to ...

Page 4: ... damage it or result in a system failure IMPORTANT Draws attention to information that is essential for understanding the operation and or features of the controller Force Majeure 1 Yokogawa assumes no liability to any party for any loss or damage direct or indirect caused by the use or any unpredictable defect of the product 2 No portion of the software supplied by Yokogawa may be transferred exc...

Page 5: ...t damage and ensure its safe use make certain that all of the instructions and precautions relating to safety contained in this document are strictly adhered to Yokogawa does not guaran tee safety if products are not handled according to these instructions 2 Modification of the product is strictly prohibited 3 Reverse engineering such as the disassembly or decompilation of software is strictly pro...

Page 6: ...Blank Page ...

Page 7: ... Output Type except for a Position Proportional Controller 2 9 2 5 Calibrating Valve Position for a Position Proportional Controller Only 2 11 2 6 Initializing Parameters 2 12 2 7 Changing Alarm Type 2 13 2 8 Description of Multiple Setpoints and PID 2 16 3 Operations 3 1 3 1 Monitoring purpose Operating Displays Available during Operation 3 1 3 2 Setting Target Setpoint SP 3 3 3 3 Performing Canc...

Page 8: ...intenance 4 6 4 2 1 Cleaning 4 6 4 2 2 Replacing Brackets 4 6 4 2 3 Attaching Terminal Cover 4 7 4 2 4 Replacing Parts with a Limited Service Life 4 8 4 2 5 Replacing Control Output Relays 4 9 5 Parameters 5 1 5 1 Parameter Map 5 1 5 2 Lists of Parameters 5 6 6 Function Block Diagram and Descriptions 6 1 Revision Information i ...

Page 9: ...ns 4 With remote input and 1 additional DI Model Suffix Code Description UT420 Digital indicating controller provided with retransmission output and 15 V DC loop power supply as standard Type 0 Standard type 0 None 7 With communication remote input and 2 additional DIs Optional functions 8 With remote input and 2 additional DIs Check that the following items are provided Digital indicating control...

Page 10: ... element 8 no water is splashed 9 no flammable materials are around Never place the controller directly on flammable items or equipment If the controller has to be installed close to flammable items or equipment be sure to provide shielding panels all around the controller at least 150 mm away from every side the panels should be made of either 1 43 mm thick metal plated steel plates or 1 6 mm thi...

Page 11: ...lies if N 5 100 11 UT450 General installation Side by side close installation 1 to 10 mm Panel thickness Small bracket Large bracket 91 8 112 Unit mm 96 96 PV AL1 2 3 YOKOGAWA REM MAN SET ENT A M N 1 48 45 0 6 0 0 8 0 92 N stands for the number of controllers to be installed However the measured value applies if N 5 100 48 11 UT420 1 to 10 mm Panel thickness Small bracket Small bracket 91 8 96 112...

Page 12: ...from the front of the panel so that the terminal board on the rear is at the far side 2 Set the brackets in place on the top and bottom of the controller as shown in the figure below then tighten the screws of the brackets Take care not to overtighten them Large bracket top mounting hardware Terminal board Small bracket bottom mounting hardware Panel Insert a screwdriver into the brackets to tight...

Page 13: ...se shielded compensating lead wires for wiring For RTD input use shielded wires that have low conductor resistance and cause no significant differences in resistance between the three wires The cables to be used for wiring terminal specifications and recommended parts are as shown below 3 Control output relays may be replaced However because they have a life of 100 000 times that of the resistance...

Page 14: ...o 2 0 mm2 Thermocouple Shielded compensating lead wires JIS C 1610 X See Yokogawa Electric s GS 6B1U1 E RTD Shielded wires three conductors UL2482 Hitachi Cable Other signals Shielded wires Recommended Terminal Lugs 3 7mm 7 m m o r l e s s 3 7mm 7 m m o r l e s s or 0 3 to 1 65 mm2 0 8 N m or less Applicable wire size Tightening torque Terminal Covers Target Model Part Number Sales Unit For UT450 ...

Page 15: ...00 Allowable wiring resistance for RTD input Maximum 150 wire Conductor resistance between three wires should be equal However 10 wire for a maximum range of 150 0 to 150 0 C Wire resistance effect 0 1 C 10 Allowable input voltage 10 V DC for thermocouple mV or RTD input 20 V DC for DC voltage input Noise rejection ratio 40 dB 50 60 Hz or more in normal mode 120 dB 50 60 Hz or more in common mode ...

Page 16: ...4 15 Number of outputs 1 terminals 14 15 Output signal 4 20 mA DC Load resistance 600 or less Output accuracy 0 1 of span 5 of span for 1 mA or less Under standard operating conditions 23 2 C 55 10 RH power frequency of 50 60 Hz Control Output Universal output system The output type can be selected with the software Relay contact output s for the position proportional type Current output Standard ...

Page 17: ...20 07 UT420 08 2 7 3 6 3 2 4 4 UT450 0 UT450 1 UT450 2 UT450 3 UT450 4 Input type Non voltage contact or transistor open collector input Input contact rating 12 V DC 10 mA or more On off determination For non voltage contact input contact resistance of 1 k or less is determined as on and contact resistance of 20 k or more as off For transistor open collector input input voltage of 2 V or less is d...

Page 18: ...EN61010 1 in Measurement category I and is not the value which guarantees an apparatus perfor mance CAUTION This equipment has Measurement category I therefore do not use the equipment for measurements within Measurement categories II III and IV 1 2 3 4 Measurement category CAT 1 CAT 2 CAT 3 CAT 4 Remarks Appliances portable equipments etc Distribution board circuit breaker etc Overhead wire cable...

Page 19: ... wiring and power ground wiring as well Power Supply Specifications Power supply Rated voltage of 100 to 240 V AC 10 50 60 Hz Power consumption Max 20 VA 8 0 W max Internal fuse rating 250 V AC 1 6A time lug fuse Data backup Non volatile memory can be written to up to 100 000 times Withstanding voltage Between primary terminals and secondary terminals At least 1500 V AC for 1 minute Between primar...

Page 20: ... from other input output terminals and internal circuit Relay contact control output terminals Isolated between contact output terminals and from other input output terminals and internal circuit Contact input terminals Not isolated between contact input terminals and from com munication terminals Isolated from other input output terminals and internal circuit Relay contact alarm output terminals ...

Page 21: ...less 11 ms Installation height Height above sea level of 2000 m or less Warm up time 30 minutes or more after power on Transportation and storage conditions Temperature 25 to 70 C Temperature change rate 20 C h or less Humidity 5 to 95 RH no condensation allowed Effects of changes in operating conditions Effects from changes in ambient temperature On voltage or thermocouple input 1 V C or 0 01 of ...

Page 22: ...oc 1 Installation IM 05D01C12 41E 4th Edition May 31 2006 00 1 5 Terminal Wiring Diagrams NOTE Do not use unassigned terminals as relay terminals Terminal wiring diagrams are shown on and after the next page ...

Page 23: ...V 5V 5V 5V 5V Contact Transistor contact DIS is a setup parameter Changing DIS setpoint allows you to change the function of external contact input Contact rating 12 V DC 10 mA or more 6 5 Alarm output 4 7 34 35 AL1 AL2 AL3 COM AL4 COM Relay contact rating 240 V AC 1 A 30 V DC 1 A resistance load Transistor contact rating 24 V DC 50 mA 14 15 Retransmission output 4 20 mA DC 14 15 15 V DC loop powe...

Page 24: ... when DI2 OFF AUTO when DI3 ON MAN when DI3 OFF When DIS 2 AUTO when DI1 ON MAN when DI1 OFF 2 SP when DI2 ON 1 SP when DI2 OFF STOP when DI3 ON RUN when DI3 OFF When switching target SP 1 to 4 Contact Transistor contact Contact rating 12 V DC 10 mA or more DIS is a setup parameter Changing DIS setpoint allows you to change the function of external contact input Default 1 5 V DC UT UT 12 13 When r...

Page 25: ...2 AUTO when DI1 ON MAN when DI1 OFF 2 SP when DI2 ON 1 SP when DI2 OFF STOP when DI3 ON RUN when DI3 OFF No function No function No function Common Remote when R L ON Local when R L OFF Common When DIS 1 Factory set default AUTO when DI1 ON MAN when DI1 OFF STOP when DI2 ON RUN when DI2 OFF Common Remote when R L ON Local when R L OFF Common When DIS 0 No function No function No function No functi...

Page 26: ...ssion is configured at factory before shipment If 15 V DC loop power supply is used retransmission output cannot be used TC input RTD input Contact Transistor contact Correspondence between parameter DIS and external contact input functions When DIS 4 When DIS 3 When DIS 2 When DIS 1 Factory set default When DIS 0 When switching target SP 1 to 4 AUTO when DI1 ON MAN when DI1 OFF STOP when DI2 ON R...

Page 27: ...put Type Calibrate valve position Set the control output Factory set to Time Proportional Relay Output Initialize parameters Denotes a step that must always be followed Factory set to Unspecified Denotes a step that should be followed as necessary Setup Procedure Yes Set operating parameters Controller operation See 2 4 Setting Control Output Type See 2 5 Calibrating Valve Position See 2 6 Initial...

Page 28: ...tus of a deviation PV SP Is lit in orange if a deviation exceeds the deviation display range Is lit in green when a deviation is within the deviation display range Is lit in orange if a deviation falls below the deviation display range The deviation monitor goes off if any display other than the operating display or SELECT display is shown Is lit in green to indicate the status of operation or con...

Page 29: ...aximum value of the range to be controlled 3 Minimum value of PV input range RL Set the minimum value of the range to be controlled Parameters to be set for voltage input 1 PV input type IN Set according to an input signal 2 Maximum value of PV input range RH Set the maximum value of an input signal 3 Minimum value of PV input range RL Set the minimum value of an input signal 4 Position of PV inpu...

Page 30: ...ge PV AL1 2 3 4 MAN REM SET ENT A M Displays parameter RL 9 Press the or key to display the required setpoint The figure below shows an example of setting the minimum value of PV input range to 0 0 C PV AL1 2 3 4 MAN REM SET ENT A M Blinks during change 10 Press the SET ENT key once to register the setpoint PV AL1 2 3 4 MAN REM SET ENT A M If the type of input is voltage also config ure the PV Inp...

Page 31: ...peratures below 200 0 C for a type E thermocouple W 15 0 0 to 2300 0 C 32 to 4200 F 0 2 of instrument range 1 digit Platinel 2 16 0 0 to 1390 0 C 32 0 to 2500 0 F 0 1 of instrument range 1 digit PR20 40 17 0 0 to 1900 0 C 32 to 3400 F 0 5 of instrument range 1 digit at 800 C or more No accuracy is guaranteed at less than 800 C Thermocouple Unspecified W97Re3 W75Re25 18 0 0 to 2000 0 C 32 to 3600 F...

Page 32: ...r Minimum Value of PV Input Scale SL After a change has been made to any of these data items be sure to verify the registered operating parameter setpoints to ensure that they are correct If any data item has been changed to its default set it to a required value Ranges Selectable for PV Input Thermocouple 1 to18 30 31 35 to 37 40 41 50 51 55 56 RTD DC voltage mV V Ranges Selectable for Remote Inp...

Page 33: ... PA PV AL1 2 3 4 MAN REM SET ENT A M Displays symbol D U Displays menu OP PA 3 Press the key once to display the menu STUP PV AL1 2 3 4 MAN REM SET ENT A M Displays menu STUP 4 Press the SET ENT key once to display the menu SP PV AL1 2 3 4 MAN REM SET ENT A M Displays menu SP 5 Press the key six times to display the menu I O PV AL1 2 3 4 MAN REM SET ENT A M Displays menu I O 6 Press the SET ENT ke...

Page 34: ...the SET ENT key once to display the parameter RL minimum value of PV input range PV AL1 2 3 4 MAN REM SET ENT A M Displays parameter RL 14 Press the or key to display the required setpoint The figure below shows an example of setting the minimum value of PV input range to 0 0 C PV AL1 2 3 4 MAN REM SET ENT A M Blinks during change 15 Press the SET ENT key once to register the setpoint PV AL1 2 3 4...

Page 35: ...Wiring Diagrams 1 Bring the operating display into view display appears at power on PV AL1 2 3 4 MAN REM SET ENT A M Displays target setpoint 1 1 SP Displays PV 2 Press the SET ENT key for more than 3 sec onds to call up the menu OP PA PV AL1 2 3 4 MAN REM SET ENT A M Displays symbol D U Displays menu OP PA 3 Press the key once to display the menu STUP PV AL1 2 3 4 MAN REM SET ENT A M Displays men...

Page 36: ...3 Time proportional PID voltage pulse output terminals 16 17 Current output terminals 16 17 On off control relay contact output terminals 1 2 3 Heating side relay output terminals cooling side relay output terminals 1 2 3 48 49 50 Heating side pulse output terminals cooling side relay output terminals 16 17 48 49 50 Heating side current output terminals cooling side relay output terminals 16 17 48...

Page 37: ... ENT A M MAN lamp ON Displays target setpoint 1 1 SP Displays PV 2 Press the SET ENT key for more than 3 sec onds to call up the menu OP PA PV AL1 2 3 4 MAN REM SET ENT A M Displays symbol D U Displays menu OP PA 3 Press the key once to display the menu STUP PV AL1 2 3 4 MAN REM SET ENT A M Displays menu STUP 4 Press the SET ENT key once to display the menu SP PV AL1 2 3 4 MAN REM SET ENT A M Disp...

Page 38: ... PV AL1 2 3 4 MAN REM SET ENT A M Displays target setpoint 1 1 SP Displays PV 2 6 Initializing Parameters Be sure to follow the steps below after a change of setting has been made to the data item PV Input Type PV Input Range or PV Input Scale NOTE When initializing parameter is executed the controller initializes the operating parameters and setup parameters Therefore check that the appropriate v...

Page 39: ...tarily becomes blank which is normal indicating the parameters have been initialized PV AL1 2 3 4 MAN REM SET ENT A M 9 Press the SET ENT key for more than 3 sec onds This returns you to the display shown at power on figure below PV AL1 2 3 4 MAN REM SET ENT A M Displays PV Displays target setpoint 1 1 SP 2 7 Changing Alarm Type The following operating procedure describes an example of changing al...

Page 40: ...M PV AL1 2 3 4 MAN REM SET ENT A M Displays menu ALM 6 Press the SET ENT key once to display the parameter AL1 alarm 1 type PV AL1 2 3 4 MAN REM SET ENT A M Displays parameter AL1 7 Press the or key to display the required setpoint The figure below shows an example of setting PV low limit alarm PV AL1 2 3 4 MAN REM SET ENT A M Blinks during change 8 Press the SET ENT key once to register the setpo...

Page 41: ...8 Deviation low limit PV Target SP Deviation setpoint Open unlit Hysteresis Closed lit 4 14 De energized on PV high limit De energized on PV low limit PV Open lit Alarm setpoint Hysteresis Closed unlit 9 19 De energized on deviation high limit alarm PV Open lit Target SP Deviation setpoint Hysteresis Closed unlit 5 15 Alarm setpoint Hysteresis PV Open lit Closed unlit 10 20 25 26 27 SP high limit ...

Page 42: ... to set the number of setpoints to use For example if you have set 2 to the target setpoint number SPN the control param eters available are target setpoint 2 SP proportional band heating side proportional band 2 P integral time heating side integral time 2 I derivative time heating side derivative time 2 D cooling side proportional band 2 Pc cooling side integral time 2 Ic and cooling side deriva...

Page 43: ...rtional Controllers SP Display The PV input value appears on the PV display The target setpoint 1 SP appears on the Setpoint display can be changed OUT Display The PV input value appears on the PV display The control output value OUT appears on the Setpoint display can be changed in MAN mode When in position proportional control the Setpoint display shows the valve opening 0 to 100 PID Number Disp...

Page 44: ...in MAN mode PID Number Display The PV input value appears on the PV display The PID number PID being used appears on the Setpoint display SET ENT A M PV AL1 2 3 4 MAN REM SET ENT A M PV AL1 2 3 4 MAN REM SET ENT A M PV AL1 2 3 4 MAN REM Cooling side output Heating side output Symbol C represents the cooling side output SET ENT key SET ENT key SET ENT key Symbol H represents the heating side output...

Page 45: ...orming Canceling Auto tuning Auto tuning should be carried out after setting a target setpoint SP Make sure the control ler is in automatic operation mode AUTO and in running state RUN before carrying out auto tuning See 3 8 Switching between AUTO and MAN to change to AUTO and 3 7 Switching between Run and Stop to change to Run NOTE When on off control is being used auto tuning cannot be carried o...

Page 46: ... M Displays parameter AT 4 Press the or key to display the required setpoint Tuning for 1 SP is AT 1 PV AL1 2 3 4 MAN REM SET ENT A M Blinks during change To cancel auto tuning set AT OFF 5 Press the SET ENT key once to register the setpoint This starts auto tuning If the SET ENT key is pressed when AT OFF auto tuning will be cancelled In this case PID contains the value existing before auto tunin...

Page 47: ... key several times to display the parameter PID PV AL1 2 3 4 MAN REM SET ENT A M Displays parameter PID 4 Press the key once to display 1Gr PV AL1 2 3 4 MAN REM SET ENT A M Blinks during change 5 Press the SET ENT key once to register the setpoints PV AL1 2 3 4 MAN REM SET ENT A M 6 Press the SET ENT key once to display the parameter 1 P proportional band for 1 SP PV AL1 2 3 4 MAN REM SET ENT A M ...

Page 48: ...tpoint Check alarm type before setting the alarm setpoint To change alarm type see 2 7 Changing Alarm Type Alarm output terminals Factory shipped settings Alarm 1 terminal numbers PV high limit alarm Alarm 2 terminal numbers PV low limit alarm Alarm 3 terminal numbers PV high limit alarm Alarm 4 terminal numbers PV low limit alarm 6 7 5 7 4 7 34 35 1 Bring the operating display into view display a...

Page 49: ...N from 1 to 2 NOTE If a target setpoint number has been switched using contact input when the contact input is on that number cannot be selected by keystroke No target setpoint number can be selected by key operation if the setup parameter DIS DI function selection is set to 2 or 3 1 Bring the operating display into view display appears at power on PV AL1 2 3 4 MAN REM SET ENT A M Displays PV Disp...

Page 50: ...by keystroke configure setup parameter DIS 0 When the controller is stopped input and outputs are as follows PV input Displays PV Control output Preset output value factory shipped setting 0 Alarm output ON in the event of an alarm 1 Bring the operating display into view display appears at power on PV AL1 2 3 4 MAN REM SET ENT A M Displays PV Displays target setpoint 1 1 SP 2 Press the SET ENT key...

Page 51: ...utput value n PO to be switched The n is same as the target setpoint number In heating cooling control output display in STOP AL1 2 3 4 MAN REM SET ENT A M PV Displays a fixed preset cooling side output value Displays a fixed preset heating side output value Displays symbol S T In Position proportional control output display in STOP AL1 2 3 4 MAN REM SET ENT A M PV Displays the valve opening 0 to ...

Page 52: ...er is stopped In this case the preset output value operating parameter PO will be output In heating cooling control the heating side preset output value operating parameter PO and cooling side preset output value operat ing parameter Oc will be output A control output value is linked with a display value changed using the or key Note that the control output changes as displayed without requiring t...

Page 53: ...ooling side output C 0 0 the heating side output H decreases Consequently both the heating side and cooling side outputs change to 0 0 If you keep the key held down longer you enter the state of manipulating the cooling side output and its value begins to increase Inversely if you hold down the key with the cooling side output under manipulation i e heating side output H 0 0 the cooling side outpu...

Page 54: ...ooling side manipulated output Heating side manipulated output Output 24 8 DB 12 4 12 4 0 12 4 Change in manipulated output when the dead band is negative Manipulating the Control Output during Position Proportional Control The controller continues to provide control output as long as the or key is being pressed key Closes the valve key Opens the valve SET ENT A M PV AL1 2 3 4 MAN REM OUT display ...

Page 55: ... Bring the operating display into view display appears at power on PV AL1 2 3 4 MAN REM SET ENT A M Displays PV REM lamp OFF Displays target setpoint 1 1 SP 2 Press the SET ENT key for more than 3 sec onds to call up the menu OP PA PV AL1 2 3 4 MAN REM SET ENT A M Displays symbol D U Displays menu OP PA 3 Press the SET ENT key several times to display the parameter R L AL1 2 3 4 MAN REM SET ENT A ...

Page 56: ...Blank Page ...

Page 57: ...ls Check the key lock setting Is display faulty Yes No Turn off power and then turn it on again Is I O signal faulty Yes No Check the instrument s I O specifications Check the supply voltage Check the specifications of I O counterpart for wrong polarity Check the communication related parameters Check the specifications of communication counterpart Check communication wiring Is communication link ...

Page 58: ...ror code Note See description below Parameter error Normal action Normal action Normal action Normal action Check and set the initialized parameters E000 E001 E002 Note An error code is displayed on the setpoint display unit An error code is displayed in the event of an error according to its type An error code is a two digit figure in which a combination of 6 bits of on and off is converted into ...

Page 59: ... Recovery at normal receipt Check process Press any key to erase error indication Normal action Normal action Stopped Normal action Normal action Normal action Normal action Decimal point at right end lights Setpoint display unit Runaway due to defective power or noise Undefined Faulty if power off on does not reset start the unit Contact us for repair All indications off Power off None 0 or less ...

Page 60: ...lue PO as control output and continues action set before power failure in MAN mode For position proportional type when V MD Valve position feedback type starts action from feedback input condition at recovery from power failure When V MD Valve position estimating type starts action from 0 For heating cooling control starts action from heating side output value and cooling side output value of 50 o...

Page 61: ... all The UT450 UT420 controllers have a universal output The type of control output can be set changed using the parameter OT At this point the controller must be wired correctly according to the selected type of control output Check the wiring first if the controller provides no control output To do this refer to 1 5 Terminal Wiring Diagrams With the parameters OH and OL it is possible to set cha...

Page 62: ... and operation keys should be gently wiped with a dry cloth NOTE Do not use alcohol benzine or any other solvents 4 2 2 Replacing Brackets When the brackets are broken or lost purchase the following brackets for replacement Target Model Part No UT450 T9115NL UT420 T9115NK A large bracket and small bracket in pair Small brackets in pair Sales Unit SEE ALSO 1 2 How to Install for how to replace brac...

Page 63: ...plied to the controller Doing so may result in electric shock Before attaching the terminal cover turn off the source circuit breaker and use a tester to check that the power cable is not conducting any electricity 1 Before attaching the terminal cover fold it once or twice so that the side which has the Handle With Care symbol is on the outside Fold over Grooved Fold over Alert symbol on the back...

Page 64: ...vice life given in the table assume that the controller is used under normal operating conditions Part Aluminum electrolytic condenser EEPROM About 10 years rated About 100 000 times of writings Service life Alarm output relays About 100 000 more ON OFF operations or with resistance load Control output relays About 100 000 more ON OFF operations or with resistance load If any of these parts except...

Page 65: ...rnal unit for any other purpose other than to replace the control output relays 1 Insert a flat blade screwdriver tip width of 6 mm is recommended into the opening with the tip in parallel with the front panel and then turn the screwdriver gently Take this procedure to four openings 1 2 3 and 4 see the figure below on the upper and lower parts of the bezel in order The bezel slightly moves forward...

Page 66: ...ode of the UT450 UT420 Confirm the location of the control output relay to be replaced before pulling out the relay Relay UT450 0䊐 or UT420 0䊐 Two relays for direct and reverse action UT450 1䊐 Upper Lower 6 Pull out the relay to be replaced The control output relays are easy to remove and mount since they are connected via a socket onto the print boards Insert the new relay in the socket Use the f...

Page 67: ...nal unit into the housing Apply power to the controller and confirm that the initial operating display is shown If the operating display is not shown properly turn off the controller and pull out the internal unit Then insert it into the housing again This completes replacement of the control output relay ...

Page 68: ...Blank Page ...

Page 69: ...ameters 5 1 Parameter Map This section contains a parameter map as a guideline for setting parameters These maps helpful in finding the positions of the displays when setting the parameters and should be used as a quick reference for the entire range of parameter displays ...

Page 70: ...SET ENT SET ENT SET ENT SET ENT UT450 UT420 Operating Parameter Map Operating Display SP display OUT display or OUT display for heating cooling control PID number display Menu To switch the parameter display press the key Not displayed for UT420 Displayed only for controllers with remote input Displayed when setup parameter DIS 0 Displayed in automatic operation Displayed only for controllers with...

Page 71: ...ressing the key when PID 7Gr causes PID for 7 SP to appear Pressing the key when PID 8Gr causes PID for 8 SP to appear Not displayed for ON OFF control Displayed for ON OFF control Displayed for heating cooling control Displayed for heating cooling control or position proportional PID control Displayed for heating cooling control Password input No password is required when PWD 0 Displayed only whe...

Page 72: ...T OK SPL SET ENT UT450 UT420 Setup Parameter Map Password check display To operating parameter setting display menu OP PA on the previous page Menu Target setpoint related Parameters RMS and SPT are displayed only for controllers with remote input Alarm related Control action related Retransmission output related Security Sets the display group number of operating parameter PIDs Displayed when par...

Page 73: ...SET SET Press the or key once Press the and keys simultaneously SET ENT Press the key once SELECT display Input output related Communication Valve related Parameter initialization Displayed only for controllers with remote input Displayed first after power on Not displayed for position proportional controllers Displayed only for controllers with communication function Displayed in manual operation...

Page 74: ...t range Deviation alarm 0 0 of PV input range span Other PV SP low limit alarm 0 0 of PV input range Output high limit alarm 100 0 Output low limit alarm 0 0 Remote local switching REM 0 remote operation LCL 1 local operation LCL 0 Run stop switching Stop 1 operation stopped Run 0 operation started RUN 0 Auto tuning OFF 0 No auto tuning 1 Auto tuning for 1 SP 2 Auto tuning for 2 SP 3 Auto tuning f...

Page 75: ...ge However between target setpoint limiter lower limit SPL and upper limit SPH 0 0 of PV input range 0 0 of PV input range 0 0 to 100 0 of PV input range Target setpoint 5 Target setpoint 6 Target setpoint 7 Target setpoint 8 Non display in factory shipped setting To display them set setup parameter GRP PID group number to the number you wish to display FL BS UPR DNR RT RBS RFL ORB ORH ORL 1 SP 2 ...

Page 76: ...nual reset value is 50 the output value is 50 when PV SP becomes true 50 0 ON OFF control hysteresis Heating side ON OFF control hysteresis in heating cooling control In ON OFF control 0 0 to 100 0 of PV input range span Position proportional PID control or heating cooling control 0 0 to 100 0 ON OFF control 0 5 of PV input range span Position proportional PID control and heating cooling control 0...

Page 77: ...1E 4th Edition May 31 2006 00 Refer to the table below for recording setpoints when two sets or more of PID parameters are used Parameter n 2 n 3 n 4 n 5 n 6 n 7 n 8 n P n I n D n OH n OL n MR n H n Pc n DR n DB n Ic n Dc n Hc n PO n Oc ...

Page 78: ...peration 2 Stop of operation Start of automatic operation 3 Power on 4 Changing of SP number 5 Does not work when the target setpoint is changed OFF 0 Ramp rate time unit setting HOUR 1 MIN 0 Time unit of setpoint ramp up rate UPR and setpoint ramp down rate DNR HOUR 1 Target setpoint limiter upper limit Target setpoint limiter lower limit 100 0 of PV input range 0 0 of PV input range 0 0 to 100 0...

Page 79: ...e enabled or disabled according to the operating condition 0 Always active 1 Not active when in Stop mode 2 Not active when in Stop mode or manual operation 0 AL1 AL2 AL3 AL4 HY1 HY2 HY3 HY4 DY1 DY2 DY3 DY4 AMD Parameter Symbol Name of Parameter Setting Range and Description Initial Value User Setting Target Item in CD ROM OFF 0 1 to 20 25 to 31 1 PV high limit energized no stand by action 2 PV lo...

Page 80: ... PID reference point 5 Zone PID reference point 6 0 0 to 100 0 of PV input range Note that 1 RP 2 RP 3 RP 4 RP 5 RP 6 RP Set ZON PID selection ZON parameter to 1 The example below sets reference points 1 and 2 to provide 3 zones to switch PID constants automatically A maximum of 7 zones are settable 100 value of PV input range Zone switching hysteresis 0 0 to10 0 of PV input range span Allows a hy...

Page 81: ... 0 ON 1 OFF 0 OFF 0 ON 1 OFF 0 OFF 0 ON 1 OFF 0 DAT A M R L Lock of parameter for PID parameter display number Password setting OFF 0 ON 1 OFF 0 0 Password not set 1 to 30000 0 PID PWD Parameter Symbol Name of Parameter Setting Range and Description Initial Value User Setting Target Item in CD ROM Ref 7 1 2 same as above same as above same as above Ref 7 1 1 SELECT Display Parameters SELECT displa...

Page 82: ...input burnout action Presence absence of PV input reference junction compensation 0 to 4 Set the position of the decimal point of voltage mode PV input 2 100 00 0 00 OFF 0 UP 1 Up scale DOWN 2 Down scale OFF 0 ON 1 41 IN UNI RH RL DP SH SL BSL RJC RSP PV input type PV INPUT terminals terminals 13 12 11 Remote input type RSP INPUT terminals terminals 21 22 OFF 0 1 to 18 30 31 35 to 37 40 41 50 51 5...

Page 83: ...tional PID voltage pulse output terminals 16 17 Current output terminals 16 17 ON OFF control relay contact output terminals 1 2 3 Heating side relay output terminals cooling side relay output terminals 1 2 3 48 49 50 Heating side pulse output terminals cooling side relay output terminals 16 17 48 49 50 Heating side current output terminals cooling side relay output terminals 16 17 48 49 50 Heatin...

Page 84: ... the PSL parameter is set to MODBUS ASCII Fixed at 8 when the PSL parameter is set to MODBUS RTU or Ladder Communication 8 Address 1 to 99 However the maximum number of stations connectable is 31 1 Minimum response time 0 to 10 10 ms 0 Commu nication functions 0 PC link communication 1 PC link communication with sum check 2 Ladder communication 3 Coordinated master station 4 Coordinated slave stat...

Page 85: ...defined Valve action time 5 to 300 sec Used to operate a valve according to the estimated valve position Set the time required for the valve to open fully from a state of being fully closed Confirm the valve action time by consulting the datasheet of the valve s specifications The valve action time is only effective when Valve Adjustment Mode V MD is set to 1 or 2 60 sec Valve adjusting mode 0 Val...

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Page 87: ...ck diagrams for Standard Type Heating Cooling Type and Position Proportional Type For details on these function block diagrams refer to the descriptions mentioned later In the function block diagram for Standard Type some contact input output that UT420 does not have appear Refer to the function block diagram after confirming the presence absence of the contact input output ...

Page 88: ... function PV input terminals and Remote input terminals and 12 13 11 AL4 AL3 AL2 AL1 Alarm 1 Alarm 2 Alarm 3 Alarm 4 DI3 DI4 DI5 DI6 DI1 DI2 R L PV INPUT RSP INPUT 22 21 27 23 Input selection Unit selection Input range conversion Input bias Input filter Input selection Input range conversion Remote setting filter Ratio bias calculation Terminal Parameter Function Analog signal Contact signal Front...

Page 89: ...on terminals to PV input terminals and Remote input terminals and 12 13 11 22 21 23 27 Input selection Unit selection Input range conversion Input bias Input filter Input selection Input range conversion Contact input REMOTE ON LOCAL OFF switching Communication Aux Input LOCAL REMOTE Remote setting filter Ratio bias calculation Target setpoint selection 17 16 Current or pulse terminals and Relay t...

Page 90: ...on relay is ON when or key is hold down RMS COM RMS RSP Communication terminals to PV input terminals and Remote input terminals and 12 13 11 22 21 23 27 Input selection Unit selection Input range conversion Input bias Input filter Input selection Input range conversion Communication Aux Input Remote setting filter Target setpoint selection Target setpoints 1 to 8 Target setpoint ramp rate functio...

Page 91: ... Parameters Function Parameter Input selection IN Unit selection UNI Input range conversion RH RL DP SH SL I O I O I O Menu Operating Parameters Function Parameter Menu PV input bias BS OP PA PV input filter FL OP PA Remote Input Remote input RSP INPUT can receive DC voltage signals The controller is capable of ratio biasing on remote input signals Each function can be set by the following paramet...

Page 92: ... 2 OFF ON OFF OFF 1 ON OFF OFF OFF For example set contact input 4 DI4 only to ON to change target setpoint 1 to 2 Set contact inputs 3 DI3 and 4 DI4 to ON to select target setpoint 3 Remote ON Local OFF mode switching function is assigned to R L Remote Local mode switching contact input External target setpoint can be set via remote input INPUT3 Target Setpoint and PID It is possible to use a max...

Page 93: ...utput type among the current output voltage pulse output and relay contact output signal For heating cooling control the cooling side signals are output to OUTPUT2 Preset output value is output when the operation is stopped by key operation or contact input which takes priority over the manual operation Each function can be set by the following parameters Setup Parameters Function Parameter Contro...

Page 94: ...Alarm 4 setpoint A4 OP PA Menu Retransmission Output PV target setpoint or control output can be output to retransmission output RET LPS Each function can be set by the following parameters Setup Parameters Function Parameter Retransmission output type RET Retransmission output scale RTH RTL RET RET Menu 15 V DC Loop Power Supply The 15 V DC loop power supply OUTPUT3 uses the same terminal as retr...

Page 95: ...nual No IM 05D01C12 41E Mar 2000 1st Edition Newly published Sep 2002 2nd Edition Revision Jul 2004 3rd Edition Change of the company name May 2006 4th Edition Revision by the change of safety standard description Written by Yokogawa Electric Corporation Published by Yokogawa Electric Corporation 2 9 32 Nakacho Musashino shi Tokyo 180 8750 JAPAN ...

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Page 98: ...O SUL S A Headquarters Plant Praca Acapulco 31 Santo Amaro Sao Paulo SP BRAZIL CEP 04675 190 Phone 55 11 5681 2400 Facsimile 55 11 5681 4434 YOKOGAWA ENGINEERING ASIA PTE LTD Head office 5 Bedok South Road Singapore 469270 SINGAPORE Phone 65 6241 9933 Facsimile 65 6241 2606 YOKOGAWA ELECTRIC KOREA CO LTD Seoul Sales office 395 70 Shindaebang dong Dongjak gu Seoul 156 010 KOREA Phone 82 2 3284 3000...

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