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<Toc>

<4. Troubleshooting and Maintenance>

4-5

IM 05D01B02-41E

4.2

Maintenance

This section describes the cleaning and maintenance of the UT750.

4.2.1

Cleaning

The front panel 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.

UT750

T9115NL

A large bracket and small bracket in pair

Sales Unit

SEE ALSO

“1.2 How to Install,” for how to replace brackets.

4.2.3

Attaching Terminal Cover

When a terminal cover is necessary, purchase the following part.

Target Model

Part No.

UT750

T9115YD

Sales Unit

1st Edition : May 31,2000-00

Summary of Contents for UT750

Page 1: ...Instruction Manual IM 05D01B02 41E Model UT750 Digital Indicating Controller User s Manual for Single loop Control IM 05D01B02 41E 1st Edition...

Page 2: ...Blank Page...

Page 3: ...rs Applicable to Single loop Control The specification codes of the UT750 applicable to single loop control are given in the table below UT750 00 UT750 01 UT750 10 UT750 11 UT750 50 UT750 51 Regarding...

Page 4: ...to avoid electric shock or other dangers that may result in injury or loss of life The following symbols are used in the hardcopy user s manuals and in the user s manual supplied on the CD ROM NOTE I...

Page 5: ...2 13 2 6 Initializing Parameters 2 15 2 7 Changing Alarm Type 2 16 2 8 Description of Multiple Setpoints and PID 2 19 3 Operations 3 1 3 1 Monitoring purpose Operating Displays Available during Opera...

Page 6: ...1 Cleaning 4 5 4 2 2 Replacing Brackets 4 5 4 2 3 Attaching Terminal Cover 4 5 4 2 4 Replacing Parts with a Limited Service Life 4 7 4 2 5 Replacing Control Output Relays 4 8 5 Parameters 5 1 5 1 Par...

Page 7: ...h communication remote input Optional functions Check that the following items are provided Digital indicating controller of ordered model 1 Brackets mounting hardware 1 pair Unit label 1 User s Manua...

Page 8: ...d 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...

Page 9: ...ENT A M 25 53 N 1 96 92 117 min 145 min 0 8 0 0 8 0 92 0 8 0 92 0 8 0 92 N stands for the number of controllers to be installed However the measured value applies if N 5 100 11 UT750 1 to 10 mm Panel...

Page 10: ...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...

Page 11: ...ance 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 relay...

Page 12: ...307 0 9 to 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 R...

Page 13: ...tor 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 in...

Page 14: ...mA is not feasible 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 Uni...

Page 15: ...transistor open collector input input voltage of 2 V or less is determined as on and leakage current must not exceed 100 A when off Minimum status detection hold time PV input s sampling period 3 Cont...

Page 16: ...cations Power supply Rated voltage of 100 to 240 V AC 10 50 60 Hz Power consumption Max 20 VA 8 0 W max Data backup Lithium cell with life expectancy of 10 years Withstanding voltage Between primary t...

Page 17: ...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 termin...

Page 18: ...ht 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...

Page 19: ...Installation 1 13 IM 05D01B02 41E 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 1st Edition May 31...

Page 20: ...mp on terminal lugs When receiving 4 20 mA DC current signals set the PV input type to 1 5 V DC setpoint 41 Receiving 4 20 mA DC Current Signals with the Controller 250 4 20mA Factory set to PV retran...

Page 21: ...FF ON OFF ON OFF OFF ON When switching among target setpoints 1 to 8 If all of the contact inputs are set to OFF the controller uses the immediately preceding target setpoint 19 18 External contact in...

Page 22: ...18 40 39 38 37 20 DI1 DI2 DI3 DI4 DI5 DI6 COM 5V 5V 5V 5V 5V 5V 36 DI7 36 DI7 5V Contact Transistor contact UT The functions of the external contact outputs are the defaults for single loop position p...

Page 23: ...operating display that appears at power on Power on Set the alarm type and other setup parameters See 2 2 Setting PV Input Type Setting First at Power on or 2 3 Changing PV Input Type Calibrate valve...

Page 24: ...ECT display is shown Is lit in green to indicate the status of operation or control CAS Not used in single loop control REM1 Is lit when in remote mode REM2 Not used in single loop control MAN1 Is lit...

Page 25: ...ange RH1 Minimum value of PV input scale SL1 1V 5V 0 0m 3 h 50 0m 3 h Maximum value of PV input scale SH1 2V 4V RL1 RH1 Parameters to be set for temperature input 1 PV input type IN1 Set according to...

Page 26: ...ct IN1 OFF A M DISP SET ENT 3 Press the or key to display the required setpoint The figure below shows an example of setting a K type thermocouple 200 0 C to 500 0 C See Instrument Input Range Codes M...

Page 27: ...ample of setting the minimum value of the PV input range to 0 0 C MENU UTMD IN 4 changing input 1 range low RL1 0 0 A M DISP SET ENT Blinks during change 11 Press the SET ENT key once to register the...

Page 28: ...F 0 1 of instrument range 1 digit PR20 40 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 W7...

Page 29: ...put Decimal Point Position SDP1 Maximum Value of PV Input Scale SH1 or Minimum Value of PV Input Scale SL1 After a change has been made to any of these data items be sure to verify the registered oper...

Page 30: ...setpoint 1 1 SP In steps 2 and later illustrations of the LCD are cited to explain the procedure 2 Press the SET ENT key for more than 3 seconds to call up the main menu MODE mode parameter main menu...

Page 31: ...SET ENT key once to display the parameter RH1 maximum value of PV input range SETUP A M DISP SET ENT MENU UTMD IN 3 input 1 range high RH1 500 0 1st Edition May 31 2000 00 13 Press the or key to displ...

Page 32: ...example of changing time proportional PID relay output 0 factory set default to current output 2 Control output terminal For details on the output terminals for heating cooling control see 1 5 Termin...

Page 33: ...SP SET ENT 1st Edition May 31 2000 00 8 Press the SET ENT key once to display the parameter OT1 control output type SETUP A M DISP SET ENT MENU UTMD OUT 1 output 1 select OT1 0 9 Press the or key to d...

Page 34: ...e pulse output terminals cooling side relay output terminals Heating side current output terminals cooling side relay output terminals Heating side relay output terminals cooling side transistor outpu...

Page 35: ...SP SET ENT SP 1 10 0 10 0 0 C DV Displays PV MAN1 lamp ON Displays target setpoint 1 1 SP In steps 2 and later illustrations of the LCD are cited to explain the procedure 1st Edition May 31 2000 00 2...

Page 36: ...ON 11 The controller is viewed as shown below when the valve position is being automati cally calibrated MENU UTMD VALV 1 valve auto tuning V AT ON 12 Calibration has ended successfully when the indic...

Page 37: ...re 2 Press the SET ENT key for more than 3 seconds to call up the main menu MODE mode parameter main menu MODE A M DISP SET ENT 3 Press the key once to display the main menu STUP password input main m...

Page 38: ...0 0 10 0 0 C DV 2 7 Changing Alarm Type The following operating procedure describes an example of changing alarm 1 factory set to the PV high limit alarm to the PV low limit alarm When you have change...

Page 39: ...ey once to display the parameter AL1 alarm 1 type SETUP A M DISP SET ENT MENU LOOP1 ALM 1 alarm 1 type select AL1 1 8 Press the or key to display the required setpoint The figure below shows an exampl...

Page 40: ...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 unli...

Page 41: ...ntegral 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 derivative time 2 Dc T...

Page 42: ...Blank Page...

Page 43: ...al control and those for single loop heating cooling control The Process Variable PV display always displays the value of PV input Operating Displays for Single loop and Single loop Position Propor ti...

Page 44: ...0 OUT 70 0 DV 48 5 C PID 1 C DV trend scan 20sec 0 Allows the control output value to be changed in manual operation Press the key to turn on the MAN1 lamp Then press the or key to change the control...

Page 45: ...ppears on the Setpoint display LCD For monitoring only For monitoring only Allows the control output value to be changed in manual operation Allows the target setpoint to be changed Heating Cooling OU...

Page 46: ...w display appears at power on AL A M PV REM1 CAS REM2 MAN1 MAN2 STP 2 4 1 3 PV2 AL DISP SET ENT SP 1 10 0 10 100 0 C DV Displays PV Displays target setpoint 1 1 SP In steps 2 and later illustrations o...

Page 47: ...hange at control element results in inconvenience Processes where variations in PV may exceed an allowable range adversely affect ing product quality 1 Bring the operating display into view display ap...

Page 48: ...nce 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 tuning MENU LP1 PA...

Page 49: ...Press the key once to display the submenu 1 PID PID parameter SPno 1 sub menu 1 PID A M DISP SET ENT 6 Press the SET ENT key six times to display the parameter 1 P proportional band for 1 SP A M DISP...

Page 50: ...ng the alarm setpoint When changing the alarm type see 2 7 Changing Alarm Type Alarm output terminals Factory Set defaults Alarm 1 terminal numbers PV high limit alarm Alarm 2 terminal numbers PV low...

Page 51: ...2000 00 6 Press the SET ENT key twice to display the parameter 1 A1 MENU LP1 1 PID 2 alarm 1 set point 1 A1 200 0 C A M DISP SET ENT 7 Press the or key to display the required setpoint C MENU LP1 1 PI...

Page 52: ...later illustrations of the LCD are cited to explain the procedure 1st Edition May 31 2000 00 5 Press the SET ENT key once to register the setpoint A M DISP SET ENT MENU MODE 6 SPno select SPNO 2 6 Pr...

Page 53: ...de with contact input 6 DI6 RUN when DI6 is set to OFF 37 20 STOP when DI6 is set to ON 37 20 AL A M PV REM1 CAS REM2 MAN1 MAN2 STP 2 4 1 3 PV2 AL DISP SET ENT When at a stop the controller behaves as...

Page 54: ...MAN2 STP 2 4 1 3 PV2 AL DISP SET ENT SP 1 10 0 10 100 0 C DV Displays PV Displays target setpoint 1 1 SP 2 Each time you press the A M key on the front panel of the instrument AUTO and MAN is switched...

Page 55: ...ation see 3 8 Switching between AUTO and MAN AL A M PV REM1 CAS REM2 MAN1 MAN2 STP 2 4 1 3 PV2 AL DISP SET ENT 0 50 100 1 SP 100 0 PID 1 OUT 30 0 C MAN1 lamp ON 2 Press the or key to change a control...

Page 56: ...enter the state of manipulating the heating side output and its value begins to increase Cooling side manipulated output Heating side manipulated output Output DB 12 4 Dead band Operating parameter DB...

Page 57: ...cribes an example of switching from Local LCL to remote REM Switching between REM and LCL is possible for only controllers with remote input feature Local Performs control using target setpoints set i...

Page 58: ...ain menu MODE A M DISP SET ENT 3 Press the SET ENT key several times to display the parameter MODE LOCAL A M DISP SET ENT MENU MODE 3 REM LOC1 select MODE LOCAL 4 Press the or key to display RE MOTE M...

Page 59: ...g 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 count...

Page 60: ...0 or less or OFF Normal action Normal action PV indicating LED Error indication PV decimal point blinks Error code See description below E000 E001 E002 Stopped An error code is displayed in the event...

Page 61: ...if power off on does not reset start the unit Contact us for repair Power off None 0 or less or OFF OFF 0 or less Stopped Check for abnormal power Feedback resistor breakdown Check the feedback resis...

Page 62: ...meters RH1 RL1 SDP1 SH1 and SL1 it is possible to scale the input signal and change its number of decimal places Also check that these param eters are configured correctly The Controller does not Prov...

Page 63: ...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 UT750 T9115NL A large bracket and smal...

Page 64: ...ot 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 sym...

Page 65: ...About 10 years rated Batteries for backup About 10 years rated Service life Alarm output relays About 100 000 more ON OFF operations or with resistance load Control output relays About 100 000 more O...

Page 66: ...er 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 screwdr...

Page 67: ...the bezel and pull it along with the internal unit out of the housing Note Be careful not to damage the RJC sensor 5 The location and number of the relays differ depending on the model code of the UT...

Page 68: ...the new relay in the socket Use the following relay Manufacturer OMRON Model G6B 2114P FD US P6B Power supply 12 V DC 7 Insert the internal unit into the housing Apply power to the controller and con...

Page 69: ...ating Parameter Map and Setup Parameter Map for UT750 as a guideline for setting parameters These maps are helpful in finding the positions of the displays when setting the param eters and should be u...

Page 70: ...ller with auxiliary analog remote input 5 Parameter MODE S R is displayed when the contact input registration parameter S R setup parameter is set to 0 6 Main menu LP2 is displayed when UT mode is Cas...

Page 71: ...control with PV switching and two universal inputs or Loop control with PV auto selector and two universal inputs 8 Main menu PYS2 is displayed when UT mode is Cascade control Loop control with PV sw...

Page 72: ...ter Map DISP Pressing the key once when a parameter setting display is shown retrieves the submenu of that parameter setting display Same as LOOP1 However RMS ZON R MD R TM are not contained 1 Paramet...

Page 73: ...T Note INIT INI SET PY2B PY2A R151 R152 R153 R154 R155 R156 R157 R158 R251 R252 R253 R254 R255 R256 R257 R258 SET DISP DI A M1 CAS S R R L1 A M2 SP 0 MAN AUTO SP 2 SP 1 SP 3 DP1 DP1 DP2 MG1 MG2 MG3 MG...

Page 74: ...Located in Main menu MODE Parameter Symbol Name of Parameter Setting Range and Description Initial Value User Setting Target Item in CD ROM Remote Local switching Set to Local when carrying out contr...

Page 75: ...001 to 9 999 Target setpoint Remote input Ratio setpoint Remote bias 1 000 Remote input bias Remote input filter 100 0 to 100 0 of PV input range span Used to correct the remote input value 0 0 of PV...

Page 76: ...eating cooling control Output high limit Heating side output high limit in heating cooling control Output low limit Cooling side output high limit in heating cooling control Manual reset ON OFF contro...

Page 77: ...l PID control 1 0 to 10 0 When performing heating cooling control setting any positive value prohibits both the heating and cooling outputs from turning on setting any negative value allows both the h...

Page 78: ...1 a8 1 b3 1 b4 1 b5 1 b6 66 7 to 105 0 of PV input range 66 7 to 105 0 of PV input range span Ten segment linearizer output Ten segment linearizer approximation 66 7 to 105 0 of PV input range 66 7 t...

Page 79: ...hen in ten segment linearizer approximation Ten segment linearizer 1 input 7 66 7 to 105 0 of PV input range 0 0 of PV input range Ten segment linearizer 1 output 7 66 7 to 105 0 of PV input range spa...

Page 80: ...etpoint ON 1 Causes the setpoint to keep track of the PV value so the setpoint automatically reverts to its original value at a preset rate of change The Setpoint Ramp up UPR and Setpoint Ramp down DN...

Page 81: ...to 99 59 min sec enabled when alarm 1 type AL1 is 1 to 20 or 28 to 31 An alarm is output when the delay timer expires after the alarm setpoint is reached 0 00 Alarm 2 delay timer 0 00 to 99 59 min se...

Page 82: ...many groups of setpoint alarm and PID parameters the controller should show 1 Show one set 2 Show two sets 3 Show three sets 4 Show four sets 5 to 8 Show as many groups of parameters as have been set...

Page 83: ...t compute the square root ON 1 Compute the square root OFF 0 Analog input 1 low signal cutoff 0 0 to 5 0 The slope equals 1 at levels below the low signal cutoff point 1 0 A BS2 Although not used in S...

Page 84: ...or voltage pulse The output is provided via terminals 16 and 17 OFF 0 Disable 1 PV1 2 SP1 3 OUT1 4 LPS loop power supply 15 V 5 PV2 6 SP2 7 OUT2 Setpoints 5 to 7 are not available for single loop con...

Page 85: ...ing Range and Description Initial Value User Setting Target Item in CD ROM SELECT display 1 registration OFF 0 201 to 1023 Select the desired parameter from among the operating and setup parameters th...

Page 86: ...SP 7 SP 8 SP ON ON OFF OFF ON ON OFF OFF DI3 DI4 OFF OFF OFF OFF OFF OFF ON OFF ON OFF ON OFF ON OFF OFF ON Ref 3 1 4 Parameter Symbol Name of Parameter Setting Range and Description Initial Value Us...

Page 87: ...cross which the voltage signal is actually controlled should be set using the parameters Maximum Value of PV Input Scale SH1 and Minimum Value of PV Input Scale SL1 Depend on the PV input type Depend...

Page 88: ...operation keep the values of these parameters between the maximum and minimum values of the PV input range 19999 to 30000 P RL1 P RH1 where P RH1 P RL1 30000 Maximum value of PV input range or scale...

Page 89: ...mA 1 0 to 20 mA 2 20 to 4 mA 3 20 to 0 mA 0 Analog output 1 100 segmental point Analog output 2 100 segmental point Analog output 2 0 segmental point Analog output 3 100 segmental point Analog output...

Page 90: ...nalog Output 3 100 Segmental Point A3H parameter to 0 6 Set the Analog Output 3 0 Segmental Point A3L parameter to 75 The figure below shows an example where both analog outputs 1 and 3 are set to the...

Page 91: ...tput 3 100 Segmental Point A3H parameter to 75 6 Set the Analog Output 3 0 Segmental Point A3L parameter to 0 The figure below shows an example where both analog outputs 1 and 3 are set to the current...

Page 92: ...s fixed for MODBUS RTU Ladder 8 BPS1 PRI1 STP1 DLN1 Minimum response time 1 0 to 10 10 ms 0 RP T1 Address 1 1 to 99 However the maximum number of stations connectable is 31 1 ADR1 Protocol selection 2...

Page 93: ...sed Confirm the valve traveling time by consulting the datasheet of the valve s specifications The valve traveling time is only effective when Valve Adjustment Mode V MOD is set to 1 or 2 60 sec Valve...

Page 94: ...50 to 100 Heating side output limiter PV SP Manual MV output Communication Heating cooling control provides two methods in which either none of the heating and cooling side outputs are presented or b...

Page 95: ...controller controls the valve by estimating its position In the case of estimating type position proportional control there is no need for feedback input wiring Feedback type position proportional co...

Page 96: ...Blank Page...

Page 97: ...m and Descriptions This chapter contains the function block diagrams for Single loop control Single loop heating cooling control and Single loop position proportional con trol For details on these fun...

Page 98: ...as PV input bias PV input filter Input selection Unit selection Contact input Target setpoint selection Target setpoints 1 to 8 REMOTE ON LOCAL OFF switching Communication Aux Input LOCAL REMOTE Remot...

Page 99: ...on AUTO ON MAN OFF switching AUTO MAN STOP ON RUN OFF switching Cooling side preset output Heating side preset output Heating side output Cooling side output 15 V loop power supply Retransmission outp...

Page 100: ...er Target setpoint ramp rate function Manual operation In MAN operation relay is ON when or key is hold down Preset output AUTO ON MAN OFF switching STOP ON RUN OFF switching AUTO MAN RUN STOP Feed ba...

Page 101: ...nction can be set by the following parameters Setup Parameters Function Parameter Input selection IN1 Unit selection UNI1 Analog input range conversion RH1 RL1 SDP1 SH1 SL1 UTMD UTMD UTMD IN IN IN Ana...

Page 102: ...LP1 MODE PAR PAR None Main menu Submenu Contact Input It is possible to select one out of eight setpoints by turning the four contact input signals ON or OFF This function is assigned to DI1 contact i...

Page 103: ...n Dc LP1 LP1 n PID n PID Cooling side proportional band Pc Cooling side integral time Ic Cooling side derivative time Dc Main menu Submenu Note Parameters n SP n P n I n D n Pc n Ic n Dc n 1 to 8 corr...

Page 104: ...side preset output n OL n OH LP1 n PID Note Parameters n PO n POc n OL n OH n 1 to 8 and submenu n PID n 1 to 8 correspond to the target setpoint number selected in the target setpoint number selecti...

Page 105: ...owing parameters Setup Parameters Function Parameter Retransmission output 1 type RET1 Retransmission output 1 scale RTH1 RTL1 Retransmission output 2 type RET2 CMLP CMLP CMLP RET RET RET Retransmissi...

Page 106: ...Blank Page...

Page 107: ...s Manual for Single loop Control Manual No IM 05D01B02 41E May 2000 1st Edition Newly published Written by Products Documents Controllers Conditioners Division Yokogawa M C Corporation Published by Yo...

Page 108: ...Blank Page...

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