DELTA A Series Temperature Controller
Instruction Sheet
2013/03/27
Precautions
DANGER! Caution! Electric Shock!
- Do not touch AC terminals while power is supplied to prevent electric shock.
- Ensure power is disconnected before checking the unit internally.
- The symbol indicates double insulation or reinforced insulation (Class II of IEC 536).
WARNING!
This controller is an open-type temperature controller. Evaluate any dangerous application to prevent serious human injury or property damage.
- Always use recommended solder-less terminals: Fork terminal with isolation (M3 screw, width 7.0mm, hole diameter 3.2mm). Screw size: M3 x 6.5. Recommended tightening torque: 0.4 N.m (4kgf.cm). Applicable wire: Solid/twisted wire of 2 mm², 12AWG to 24AWG. Tighten properly.
- Prevent dust or foreign objects from falling inside the controller.
- Never modify or disassemble the controller.
- Do not connect anything to "No used" terminals.
- Ensure all wires are connected to the correct polarity of terminals.
- Do not install or use in environments with: dust or corrosive gases/liquids, high humidity, high radiation, vibration/shock, high voltage/frequency.
- Turn power OFF when wiring or changing a temperature sensor.
- Use compensating wires matching thermocouple types when extending or connecting thermocouple wires.
- Use resistance wires when extending or connecting platinum resistance thermometer (RTD).
- Keep RTD wires short and route power wires away from load wires to prevent interference and noise.
- This controller is an open-type unit and must be placed in an enclosure away from high temperature, humidity, dripping water, corrosive materials, airborne dust, electric shock, or vibration.
- Ensure power cables and signal wires are properly installed before energizing the controller.
- Do not touch terminals or attempt to repair the controller when power is applied.
- Wait at least one minute after power disconnection for capacitors to discharge before touching internal circuits.
- Do not use acid or alkaline liquids for cleaning. Use a soft, dry cloth.
- This instrument has no power switch or fuse. Install protection close to the instrument if required. Recommended fuse rating: 250V, 1A (Time-lag fuse).
- Note: This controller does not provide overcurrent protection. Suitable overcurrent protection device(s) must be added (Rated 250V, 15 Amps max). A suitable disconnecting device should be provided near the controller.
Ordering Information
| Series | Panel Size (W x H) | Output Selection | Communication (Optional) | Current Transformer (CT) Function (Optional) |
|---|---|---|---|---|
| DTA: Delta A Series Temperature Controller | 4848: 1/16 DIN W48 x H48mm 4896: 1/8 DIN W48 x H96mm 7272: W72 x H72mm |
R: Relay output, SPDT (SPST: 1/16 DIN size), 250VAC, 5A V: Voltage Pulse output, 14V+10% ~ -20% (Max. 40mA) C: Current output, 4 ~ 20mA |
0: No interface 1: RS-485 |
None: No CT function T: Current transformer is provided (only DTA7272 series support this function) |
Display, LED & Pushbuttons
PV Display: Displays the process value or parameter type.
SV Display: Displays the set point, parameter operation read value, manipulated variable, or set value of the parameter.
AT: Flashes when Auto-tuning operation is ON.
OUT: Lights when the output is ON.
SET: Function key. Press to select desired function mode or confirm a setting value.
↑: Mode key. Press to set parameters within each function mode.
°C, °F: Temperature unit LEDs. °C LED lights for Celsius, °F LED lights for Fahrenheit.
↑: Up key. Press to increase values on SV display. Hold to speed up incremental action.
↓: Down key. Press to decrease values on SV display. Hold to speed up decrements.
ALM1 / ALM2: Alarm output LEDs. Lights when Alarm 1 or Alarm 2 output is ON.
Specifications
- Input voltage: 100~240VAC, 50/60Hz
- Operation voltage range: 85% to 110% of rated voltage
- Power consumption: 5VA max.
- Display method: 7-segment digit LED Display (PV: Red, SV: Green)
- Sensor type: Thermocouple (K, J, T, E, N, R, S, B, U, L, Txk), 3-wire Platinum RTD (Pt100, JPt100), Copper resistor (Cu50)
- Control mode: PID, ON/OFF control, or Manual tuning
- Control output: Relay output (SPDT, 250VAC, 5A), Voltage Pulse output (DC 14V, Max. 40mA), Current output (4-20mADC, Max. 600Ω load)
- Display accuracy: 0.1% of measuring range
- Sampling rate: 500 msec/per scan
- Vibration resistance: 10 to 55Hz, 10m/s² for 10min (X, Y, Z directions)
- Shock resistance: Max. 300m/s², 3 times (3 axes, 6 directions)
- Ambient temperature: 0°C ~ +50°C
- Storage temperature: -20°C ~ +65°C
- Relative humidity: 35% ~ 80% (non-condensing)
- Altitude: 2,000m or less
- Installation environment: Installation Category II, Pollution Degree 2. Conforming to EN61010-1
- Panel protection level: IP65
Parameters List
1. Operation Mode
| LED Display | Explanation | Default |
|---|---|---|
| RUN/STOP | Control setting begins. Run (RUN) or Stop (STOP) mode on the SV display. | RUN |
| AL1H | ALARM1 HIGH: Upper-limit alarm 1 | 4.0°C |
| AL1L | ALARM1 LOW: Lower-limit alarm 1 | 4.0°C |
| AL2H | ALARM2 HIGH: Upper-limit alarm 2 | 4.0°C |
| AL2L | ALARM2 LOW: Lower-limit alarm 2 | 4.0°C |
| LOC | Setting lock: Lock 1 (LOC 1), Lock 2 (LoC2) or OFF. Lock 1 locks all settings. Lock 2 locks settings other than SV value. When OFF, the lock function is disabled. Press SET and → keys simultaneously to release lock. | OFF |
| OUT | Output value display and adjustment in manual tuning control. Not available in ON/OFF or Auto-tuning. | 0 |
| CT | Displays current value measured by CT when control output is ON. | Read only |
2. Regulation Mode
| LED Display | Explanation | Default |
|---|---|---|
| AT | Auto-tuning setting. When AT key is set to ON (AT), PID auto-tuning starts automatically. (PID control) | OFF |
| P | Proportional Band (PID control) | 47.6 |
| I | Integral Time (PID control) | 260 |
| d | Derivative Time (PID control) | 41 |
| Pdof | Offset output when P or PD control is ON. (PID control and Ki=0) | 0 |
| Iof | Integral volume default value when PID control is ON and integral time constant is not zero. AT can automatically set this parameter. (PID control and Ki≠0) | 0 |
| HTS | Set Heating hysteresis when ON/OFF control function is ON. | 0 |
| CTS | Set Cooling hysteresis when ON/OFF control function is ON. | 0 |
| HTPD | PID heating control cycle setting (PID control) | Output Selection: V: 4 sec, R: 20 sec. |
| CLPD | PID cooling control cycle setting (PID control) | 0 |
| TPOF | Regulate temperature deviation value | 0 |
| CRHI | Regulate 20mA output deviation value (1unit = 0.1mA) | 0 |
| CRLO | Regulate 4mA output deviation value (1unit = 0.1mA) | 0 |
3. Initial Setting Mode
| LED Display | Explanation | Default |
|---|---|---|
| INPUT | Select input temperature sensor type (Refer to "Temperature Sensor Type and Temperature Range"). | Pt2 |
| UNIT | Temperature display unit, °C (C) and °F (F). | °C |
| T-HIGH | Upper limit for temperature range | 500.0 |
| T-LOW | Lower limit for temperature range | -20.0 |
| CONTROL | Control method setting: PID, ON/OFF, or manual tuning. | PID |
| 5-HC | Select Heating (HEAT) or Cooling (Cool) action. | HEAT |
| AL1 SET | Alarm 1 setting. | 0 |
| AL2 SET | Alarm 2 setting. | 0 |
| C-SL | ASCII, RTU communication formats selection. | ASCII |
| C-WE | Write-in function disable/enable. | OFF |
| C-NO | Address setting. | 1 |
| BPS | Baud rate setting. | 9,600 |
| LENGTH | Data length setting. | 7 |
| PARITY | Parity bit setting. | E |
| STOP BIT | Stop bit setting. | 1 |
Note: Alarm values should be set in the initial setting mode so AL1H, AL1L, AL2H and AL2L display in operation mode.
Operation
There are three modes: operation, regulation, and initial setting. The controller starts in operation mode upon power application.
Press the ◼ key to switch to regulation mode. Pressing the ◼ key for more than 3 seconds switches to initial setting mode. Pressing the ◼ key in regulation or initial setting mode returns to operation mode.
PV/SV: Sets the temperature set point and displays the process value. Use the ↑ and ↓ keys to set the temperature set point.
Setting method: In any function mode, press the ◼ key to select the function, then use the ↑ and ↓ keys to change settings. Press ◼ to save changes.
The following flowchart illustrates switching between settings and internal functions:
Flowchart:
- Operation Mode → (Press ◼ for less than 3 sec) → Regulation Mode
- Regulation Mode → (Press ◼) → Operation Mode
- Operation Mode → (Press ◼ for more than 3 sec) → Initial Setting Mode
- Initial Setting Mode → (Press ◼) → Operation Mode
Switching for settings:
- Regulation Mode: Auto-tuning (PID control and RUN mode)
- Operation Mode: Set temperature of target (Use ↑/↓)
- Initial Setting Mode: Set input type (Press ◼, then ↑/↓)
- Regulation Mode: Set PID PB (PID control)
- Operation Mode: Control setting RUN or STOP
- Initial Setting Mode: Set temperature unit (Press ◼, then ↑/↓)
- Regulation Mode: Set PID Ti (PID control)
- Operation Mode: AL1H Upper-limit alarm 1 (Available if ALA1 function enabled)
- Initial Setting Mode: Set upper-limit of temperature range (Press ◼, then ↑/↓)
- Regulation Mode: Set PID Td (PID control)
- Operation Mode: AL1L Lower-limit alarm 1 (Available if ALA1 function enabled)
- Initial Setting Mode: Set lower-limit of temperature range (Press ◼, then ↑/↓)
Heating and Cooling Control
Temperature control is achieved by heating or cooling. Heating starts when process temperature (PV) decreases, and cooling starts when PV increases. Both functions cannot operate simultaneously.
Temperature Sensor Type & Temperature Range
| Input temperature sensor type | Register value | LED display | Temperature range |
|---|---|---|---|
| Platinum resistance (Pt100) type 3 | 15 | Pt3 | 0.0~100.0°C |
| Platinum resistance (Pt100) type 2 | 14 | Pt2 | -20.0~500.0°C |
| Platinum resistance (Pt100) type 1 | 13 | Pt1 | -200~600°C |
| Platinum resistance (JPt100) type 2 | 12 | JPE2 | 0.0~100.0°C |
| Platinum resistance (JPt100) type 1 | 11 | JPE1 | -20.0~400.0°C |
| Copper resistor (Cu50) type2 | 20 | CU2 | -50.0~150.0°C |
| Copper resistor (Cu50) type1 | 19 | CU1 | -50~150°C |
| Thermocouple (TC) B type | 10 | B | 100 ~ 1,800°C |
| Thermocouple (TC) S type | 9 | S | 0~1,700°C |
| Thermocouple (TC) R type | 8 | R | 0~1,700°C |
| Thermocouple (TC) N type | 7 | N | -200 ~ 1,300°C |
| Thermocouple (TC) E type | 6 | E | 0~600°C |
| Thermocouple (TC) T type 2 | 5 | T2 | -20.0~400.0°C |
| Thermocouple (TC) T type 1 | 4 | T1 | -200~400 °C |
| Thermocouple (TC) J type 2 | 3 | J2 | -20.0~400.0°C |
| Thermocouple (TC) J type 1 | 2 | J1 | -100~850°C |
| Thermocouple (TC) K type 2 | 1 | K2 | -20.0~500.0°C |
| Thermocouple (TC) K type 1 | 0 | K1 | -200~1300°C |
| Thermocouple (TC) L type | 16 | L | -200~850 C |
| Thermocouple (TC) U type | 17 | U | -200~500°C |
| Thermocouple (TC) Txk type | 18 | Txk | -200 ~ 800°C |
Input Error Indication
| Set value | Explanation | ||
|---|---|---|---|
| PV | Temperature sensor not connected | no Cont |
Unknown input |
| SV | Measured temperature value exceeds temperature range | ouEr | Err |
Alarm Outputs
Two groups of alarm outputs with 13 alarm types. Alarm output activates when PV is higher or lower than the alarm limit set point.
| Set value | Alarm type | Alarm output operation |
|---|---|---|
| 0 | Alarm function disabled | Output OFF |
| 1 | Deviation upper- and lower-limit: PV value higher than SV + (AL-H) or lower than SV - (AL-L). |
ON/OFF |
| 2 | Deviation upper-limit: PV value higher than SV + (AL-H). |
ON/OFF |
| 3 | Deviation lower-limit: PV value lower than SV - (AL-L). |
ON/OFF |
| 4 | Reverse deviation upper- and lower-limit: PV value in the range of SV + (AL-H) and SV - (AL-L). |
ON/OFF |
| 5 | Absolute value upper- and lower-limit: PV value higher than AL-H or lower than AL-L. |
ON/OFF |
| 6 | Absolute value upper-limit: PV value higher than AL-H. |
ON/OFF |
| 7 | Absolute value lower-limit: PV value lower than AL-L. |
ON/OFF |
| 8 | Deviation upper- and lower-limit with standby sequence: PV reaches SV, and value is higher than SV + (AL-H) or lower than SV - (AL-L). |
ON/OFF |
| 9 | Deviation upper-limit with standby sequence: PV reaches SV, and value is higher than SV + (AL-H). |
ON/OFF |
| 10 | Deviation lower-limit with standby sequence: PV reaches SV, and value is lower than SV - (AL-L). |
ON/OFF |
| 11 | Hysteresis upper limit alarm: PV value higher than SV + (AL-H). OFF when PV value is lower than SV + (AL-L). |
ON/OFF |
| 12 | Hysteresis lower limit alarm: PV value lower than SV - (AL-H). OFF when PV value is higher than SV - (AL-L). |
ON/OFF |
| 13 | CT alarm output: Current measured by CT is lower than AL-L or higher than AL-H. (Available only for controllers with CT) |
ON/OFF |
Note: AL-H and AL-L include AL1H, AL2H, AL1L, AL2L. With standby sequence: alarm output temporarily disabled until PV reaches the set value.
Current Transformer (CT) Function
The CT function is used with alarm output. When using a CT, change alarm output mode to 13. Set current lower-limit and upper-limit between 0.5A ~ 30A. Display resolution is 0.1A, accuracy is +/- 0.5A.
Communication Parameters List
Controller offers RS-485 port for serial communication.
- Supporting transmission speed: 2,400, 4,800, 9,600, 19,200, 38,400bps
- Communication protocol: Modbus (ASCII)
- Non-supported formats: 7, N, 1 or 8, O, 2 or 8, E, 2
- Available communication address: 1 to 255 (0 is broadcast address)
- Function code: 03H (read registers), 06H (write 1 word)
| Address | Content | Explanation | |
|---|---|---|---|
| 4700H (R) | Process value (PV) | Measuring unit is 0.1, updated every 0.5 second. | |
| 4701H | Set point (SV) | Unit: 0.1 (°C or °F) | |
| 4702H | Upper-limit alarm 1 | ||
| 4703H | Lower-limit alarm 1 | ||
| 4704H | Upper-limit alarm 2 | ||
| 4705H | Lower-limit alarm 2 | ||
| 4706H | Upper-limit of temperature range | Data content should not be higher than the temperature range. | |
| 4707H | Lower-limit of temperature range | Data content should not be lower than the temperature range. | |
| 4708H | PB Proportional band | 0.1~999.9, Unit: 0.1 | |
| 4709H | Ti Integral time | 0~9,999 | |
| 470AH | Td Derivative time | 0~9,999 | |
| 470BH | Heating/Cooling hysteresis | 0~9,999 | |
| 470CH | Regulate 20mA current output deviation | -100~54 (1 unit = 0.1mA) | |
| 470DH | Regulate 4mA current output deviation | -39~100 (1 unit = 0.1mA) | |
| 470EH | Default value of integral volume | 0~100% | |
| 4710H | Input temperature sensor type | Refer to "Temperature Sensor Type and Temperature Range". | |
| 4711H | Control method | 0: PID (default), 1: ON/OFF, 2: manual tuning | |
| 4712H | Heating/Cooling control cycle | 1~99 second | |
| 4713H | Heating/Cooling control Selection | Heating: 0 (default), Cooling: 1 | |
| 4714H | Temperature regulation value | 0%~100% | |
| 4715H | Control Run/Stop setting | Run: 1 (default), Stop: 0 | |
| 4716H | Alarm 1 type | Refer to "Alarm Outputs". | |
| 4717H | Alarm 2 type | Refer to "Alarm Outputs". | |
| 4718H | Temperature unit display selection | °C: 1 (default), °F : 0 | |
| 4719H | Communication write-in selection | Disabled: 0 (default), Enabled: 1 | |
| 471AH | Software version | V1.00 indicates 0 x 100 | |
| 471BH | Read LED status | b2: °F, b3: °C, b4: AL2, b5: AL1, b6: OUT, b7: AT | |
| 471CH | Read KEY status | b0: SET, b1: Select, b2: Up, b3: Down | |
| 471DH | Read output amount | Unit: % | |
| 4729H | AT Setting | OFF: 0 (default), ON:1 | |
| 472AH | Write output amount | Available on "manual control" only. | |
| 472BH (R) | Code 0 Code 1 Code 2 Code 3 Code 4 Code 5 Code 6 Code 7 |
Normal operation (No error) Initial process Initial status (Temperature is not stable) Temperature sensor is not connected Temperature sensor input error Measured temperature value exceeds the temperature range No Int. error EEPROM Error |
|
| 4731H | Read / Write lock status | 0: No Lock, 1: Lock1, 11: Lock2, 21: Lock3 | |
| 4732H | Event input switch | 0: Event disable, 1: SV switch, 2: Run/Stop | |
| 4733H | CT monitor value | Unit is 0.1A |
Note: R refers to "read only" value.
Default Communication Response Setting
Write hex value 1234 into register at 471BH and 1234 again into register at 4724H. Re-power DTA to complete the default setting.
Communication Protocol
Command code to read N words: 03H. Maximum N is 3.
Example for reading two words from controller 01 (address 01H) at starting data address 4700H in ASCII mode:
Command message: STX, ADR1='0', ADR0='1', CMD1='0', CMD0='3', Number of data (count by byte)='04', Starting data address='0', '0', '47', '00', 'H', Number of data (counted by word)='02', LRC CHK 1='B', LRC CHK 0='3', END 1=CR, END 0=LF
Response message: STX, ADR1='0', ADR0='1', CMD1='0', CMD0='3', Number of data='04', Content of start address 4700H='0', '1', Content of start address 4701H='0', '9', LRC CHK 1='6', LRC CHK 0='7', END 1=CR, END 0=LF
LRC check: LRC check is the added sum from "Address" to "Data content". Example: 01H + 03H + 47H + 00H + 00H + 02H = 4DH, then take the complementary of 2, B3H.
Command code to write 1 word: 06H
Example for writing 1000 (03E8H) in controller 01 (comm. address 01H) at starting data address 4701H in ASCII mode:
Command message: STX, ADR1='0', ADR0='1', CMD1='0', CMD0='6', Number of data='04', Starting data address='0', '7', '0', '1', 'H', Data content='0', '3', 'E', '8', LRC CHK 1='C', LRC CHK 0='6', END 1=CR, END 0=LF
Response message: STX, ADR1='0', ADR0='1', CMD1='0', CMD0='6', Number of data='04', Starting data address='0', '7', '0', '1', 'H', Data content='0', '3', 'E', '8', LRC CHK 1='C', LRC CHK 0='6', END 1=CR, END 0=LF
Terminal Identification
Diagrams showing terminal identification for DTA4848, DTA7272, and DTA4896/DTA9648/DTA9696 models.
Mounting
Step 1: Insert the controller through the panel cutout.
Step 2: Insert the mounting bracket into the mounting groove at the top and bottom of the controller and push until the bracket stops at the panel wall.
Step 3: Insert and tighten screws on the bracket to secure the controller. (Torque: 0.8kgf-cm to 1.5kgf-cm)
Mounting Bracket Installation: Diagrams illustrating bracket installation.
Panel Cutout & External Dimensions
Panel wall thickness: 1mm to 8mm.
Clearance: Provide at least 90 mm clearance around the controller for proper ventilation. (Dimensions are in millimeters and inches).
Diagrams showing panel cutouts and external dimensions for DTA4848, DTA4896, DTA9648, and DTA7272 models.
CT Wiring Method (if CT function is selected)
Diagram showing CT wiring method.
