TEMPERATURE CONTROLLER KT2 INSTRUCTION MANUAL
Preface Thank you for purchasing Temperature Controller KT2. This manual contains instructions for the mounting, functions, operations and notes for operating the KT2. For model confirmation and unit specifications, please read this manual carefully before starting operation. To prevent accidents arising from the misuse of this controller, please ensure the operator receives this manual.
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--- CONTENTS --- 1. Model number 1.1 Model number ----------------------------------------------------------------------- 5 1.2 How to read the rated label ------------------------------------------------------ 5 2. Name and functions of the sections ------------------------------------- 5 3. Mounting to the control panel 3.1 Site selection ------------------------------------------------------------------------- 6 3.
1. Model number 1.
3. Mounting to the control panel 3.
4. Wiring Warning Turn the power supply to the instrument off before wiring. Working or touching the terminal with the power switched on may result in severe injury or death due to Electric Shock. • TC • RTD • DC : Thermocouple input terminals : RTD input terminals : DC current, DC voltage input terminals For DC current input type, connect 50 shunt resistor (sold separately) between input terminals.
5. Setup procedures 5.1 Setup procedures The setup procedures of this controller is shown below. Refer to each item for details. (1) Initial setting : Set the Input type, Alarm type, etc. during Auxiliary function setting mode 2. (If the users’ specification is the same as the default value of the KT2, initial setting is not necessary for the controller.) (2) Main setting mode: Set Step SV and Step time for Program control during Main setting mode. Refer to Chapter “6. Setup”.
Display used for explaining setting items Setting items (Section “5.2 Initial setting” and setting modes from Section 6.1 to 6.3) are explained as follows. (e.g.) Input type selection and selected means that input type characters value (K –200 to 1370 ) are indicated in turn.
Decimal point place selection No decimal point • Selects decimal point place. • Available only for DC input • : No decimal point : 1 digit after decimal point : 2 digits after decimal point : 3 digits after decimal point PV filter time constant setting 0.0 seconds • Sets PV filter time constant. Input fluctuation due to the noise can be reduced. If the value is set too large, it affects control result due to the delay of response. • Setting range: 0.0 to 10.
A1 type selection No alarm action • Selects an A1 (Alarm 1) type. : No alarm action • : High limit alarm : Low limit alarm : High/Low limits alarm : High/Low limit range alarm : Process high alarm : Process low alarm : High limit alarm with standby : Low limit alarm with standby : High/Low limits alarm with standby : Timer function : Pattern end output If Timer function is selected, Timer function works only when Delay action type, Delay time and DI (digital input) function are set or selected.
ON delay Delay action type selection • Selects a delay action type for Timer function. • Available only when Timer function is selected during A1 or A2 type selection. : ON delay • : OFF delay : ON/OFF delay ON DI (Digital input) (Contact Closed) OFF (Contact Open) DLY ON ON delay OFF DLY ON OFF delay OFF DLY ON/OFF delay DLY ON OFF DLY: Delay time setting (Fig. 5.6-1) 0 seconds Delay time setting • Sets delay time for the Timer function.
DI (Digital input) function SV1/SV2 external selection selection function • Selects DI function whether it is used as SV1/SV2 external selection function, OUT/OFF (RUN/STOP) external selection function or Timer function. If SV1/SV2 external selection function is selected; SV1 or SV2 can be switched by external contact. However, this function is not available if Program control function is selected during OUT/OFF key function selection.
6. Setup 6.1 Main setting mode To go to the main setting mode, press the key in the PV/SV display mode. Set each setting item with the or key, and register the value with the key. In the main setting mode, indicated setting items are different depending on the instrument status. • Fixed value control Setting items SV1 and SV2 will be indicated. • Program control Step SV and step time from Step 1 to Step 9 will be indicated.
Step 4 time setting 00:00 • Sets step 4 time. • Available only when program control function is selected during OUT/OFF key function selection • Setting range: 00:00 to 99:59 Step 5 SV setting 0 • Sets step 5 SV. • Available only when program control function is selected during OUT/OFF key function selection • Scaling low limit value to Scaling high limit value Step 5 time setting 00:00 • Sets step 5 time.
6.2 Sub setting mode To go to the Sub setting mode, press the Set each setting item with the or Display key while holding down the key in the PV/SV display mode. key, and register the value with the key. Item, Function, Setting range Default value AT (Auto-tuning) selection AT Cancel • Selects auto-tuning Perform/Cancel. Not available for program control standby status and for control actions other than PID action. : AT Cancel : AT Perform • OUT1 (Heating) proportional band setting 2.
(Table 6.
7. Running 7.1 Start running. After the controller is mounted to the control panel and wiring is completed, operate the unit following the procedures below. (1) Turn the power supply to the KT2 ON. For approx. 3sec after the power is switched ON, the sensor input characters and the temperature unit are indicated on the PV/SV display. See (Table 5.2-1) on page 8. During this time, all outputs and LED indicators are in an OFF status.
7.2 MV (Control output manipulated variable) indication To indicate MV, hold down the key for approx. 3 seconds in the PV/SV display mode. Keep pressing the key until MV appears, though SV1 (step 1 SV) setting item appears during the process. PV/SV display mode Hold down the key for approx. 3 seconds. Keep pressing the key until MV appears, though SV1 (step 1 SV) setting item appears during the process. (For approx.
8. Operation flowchart Automatically returns 2sec later. PV indication when SV is selected, and vice versa Press the MV indication Flashes Press the PV/SV display mode Control output OFF (Fixed value control) Press the key for 1 second. key. key. (In the case of Program control standby) PV indication: The MEMO/STEP display is unlit. Only PV is indicated. is indicated. SV indication: Program control RUN Press the key.
Input type (Character indication) and range :K -200 to 1370 : -199.9 to 400.0 :J -200 to 1000 :R 0 to 1760 :S 0 to 1760 :B 0 to 1820 :E -200 to 800 :T -199.9 to 400.0 :N -200 to 1300 : PL0 to 1390 : C(W/Re5-26) 0 to 2315 : Pt100 -199.9 to 850.0 : JPt100 -199.9 to 500.0 : Pt100 -200 to 850 : JPt100 -200 to 500 : 4 to 20mA DC -1999 to 9999 : 0 to 20mA DC -1999 to 9999 Press Alarm type :K -320 to 2500 : -199.9 to 750.0 :J -320 to 1800 :R 0 to 3200 :S 0 to 3200 :B 0 to 3300 :E -320 to 1500 :T -199.9 to 750.
9. PID auto-tuning In order to set each value of P, I, D and ARW automatically, the auto-tuning process should be made to fluctuate to obtain an optimal value. Notice • Perform auto-tuning during trial run. • During auto-tuning, none of the setting items can be set. • If auto-tuning starts during program control run, auto-tuning performs with SV at which auto-tuning starts. The step time does not progress until auto-tuning ends. • If power failure occurs during auto-tuning, auto-tuning stops.
10. Action explanation 10.
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10.5 Heating/Cooling control action (When setting dead band) (Heating/Cooling control option) Heating P-band Dead band (Cooling P-band) ON ON Heatng action Control action (Cooling action) OFF OFF SV setting Relay contact output (OUT1) 3 3 3 4 4 4 Cycle action is performed according to deviation. + 3 + 3 12V DC 12/0V DC 0V DC - 4 - 4 - 4 Cycle action is performed according to deviation.
11. Specifications 11.1 Standard specifications Mounting : Flush Setting : Input system using membrane sheet key Display PV/SV display : Red LED 4 digits, character size, 8.7 x 5 mm (H x W) MEMO/STEP display: Green LED 1 digit, character size, 8.7 x 5 mm (H x W) Accuracy (Setting and Indication): Thermocouple : Within 0.
DI (Digital input) DI (Digital input) has 3 functions. • SV1/SV2 external selection function SV1 or SV2 can be switched by external contact. However, this function is not available if Program control function is selected during OUT/OFF key function selection. DI terminals between 10 and 12 Open: SV1 DI terminals between 10 and 12 Closed: SV2 • OUT/OFF (RUN/STOP) external selection function Control output OUT/OFF (Fixed value control) or Program control RUN/STOP can be switched.
[Input abnormality indication] Output status selection when input abnormal Output status Contents and Indication Controller OUT1 Direct Overscale Measured value has exceeded Indication range high limit value. " " flashes. Underscale Measured value has dropped below Indication range low limit value. " " flashes.
Ambient humidity : 35 to 85%RH (no condensation) Weight : Approx. 120g External dimensions : 48 x 24 x 98.5mm (W x H x D) Case (Material, Color) : Flame-resistant resin, Ash gray Accessories included : Instruction manual 1 copy, Mounting frame 1 piece Accessories sold separately: Shunt resistor 1 piece (50 ) : AKT4810 Terminal cover 1 piece : AKT2801 11.2 Optional specifications Heating/Cooling control (option) Cooling proportional band: 0.0 to 10.0 times OUT proportional band (ON/OFF action when set to 0.
The PV/SV display is ]. flashing [ The PV/SV display keeps indicating the value which was set during Scaling low limit setting. The indication of the PV/SV display is abnormal or unstable. The PV/SV display is ]. indicating [ • Check whether the input signal source for DC voltage (1 to 5V DC) or DC current (4 to 20mA DC) is disconnected.
12.3 Control Problem Temperature does not rise. Presumed cause and solution • Sensor is out of order. Replace the sensor. • Check whether sensor or actuator is securely connected to the input or output terminals of the instrument. • Ensure that the wiring of sensor and actuator are correct. The control output remains • OUT1(Heating) low limit value in Auxiliary function setting mode 2 is set in an ON status. to 100% or higher. Set it to a suitable value.
[Auxiliary function setting mode 1] Indication Setting item PV/SV indication Set value lock Sensor correction Communication protocol Instrument number Communication speed Default value PV indication Unlock 0.0 Modbus ASCII 0 9600bps [Auxiliary function setting mode 2] Indication Setting item Default value Input type K: -200 to 1370 Scaling high limit value 1370 Scaling low limit value -200 Decimal point place No decimal point PV filter time constant 0.
