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Störk-Tronic TRT252-31.34 Wiring Diagram

Temperature controller with lon interface
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TRT252-31.34
Temperature controller with LON interface
Order number 900177.050
Old Id.Nr.: 199927

Wiring diagram

Product description

The flush panel control TRT252-30.34, designed as ready to plug-in unit, is specifically intended for
refrigerators with complex control functions. It has two inputs for temperature sensors, five relays
and an adjustable tension exit (ventilator). The LON interface FTT10 permits communication with
super-ordinate systems.
The integrated real-time clock, however, is a special feature of this control. It is possible to adapt
the general functions and thus the gradient of the temperature in the refrigerator to the currently
needed times.
Various parameters and an additional current- and/or switching input and a external satellite tem-
perature display permit employment of the most various tasks.
Contacts of all inputs and outputs are special plug-in connectors. They are unmistakably marked
with coloured and mechanical coding, strain-free and have a lock. Complex installations and wi-
ring, therefore become redundant. Various possibilities in the organisation of the front design and
a flexible control concept create options for customer-optimised solutions which hardly set any
limits to wishes regarding service and installation comfort.

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Summary of Contents for Störk-Tronic TRT252-31.34

  • Page 1: Wiring Diagram

    TRT252-31.34 Temperature controller with LON interface Order number 900177.050 Old Id.Nr.: 199927 Wiring diagram Product description The flush panel control TRT252-30.34, designed as ready to plug-in unit, is specifically intended for refrigerators with complex control functions. It has two inputs for temperature sensors, five relays and an adjustable tension exit (ventilator).
  • Page 2 Sensor: PTC Range: -55...99 C Front size: 252mm x 72mm Panel cut-out: 243mm x 51mm Tightness: front IP63 Connector: plug and socket...
  • Page 3 SOFTWARE .34 Adjustment options Key UP: Pressing this key you can increase the parameter or parameter value. Defrosting can be started any time by pressing the UP-key for 3 seconds. Key DOWN: Pressing this key you can decrease the parameter or parameter value. At alarm the buzzer function can be switched off with this key.
  • Page 4 First control level: Adjusting the cold room setpoint and actual time If none of the keys is pressed, the display indicates the actual value of the temperature and the actual time. Pressing the SET key, the setpoint shows on the display. If the setpoint is to be changed, the SET key is to be kept pressed while adjusting the setpoint with the keys UP and DOWN.
  • Page 5 Second control level (P-parameter): Setting of control parameters Simultaneously pressing the UP and DOWN key for at least 4 seconds opens a parameter list containing frequently used parameters (the complete list of all parameters is to be found on the third control level).
  • Page 6 Para- Function Adjustment range Standard Customer meter setting setting End of night time reduction on 00:00...24:00 24:00 Wednesday (24:00 = inactive) Start of night time reduction on 00:00...24:00 24:00 Wednesday (24:00 = inactive) End of night time reduction on 00:00...24:00 24:00 Thursday (24:00 = inactive)
  • Page 7 Third control level (all parameters): Setting of control parameters Access to the third control level is granted when selecting parameter PA on the second control level. Parameter PA is to be set at '-19'. Then the key UP and DOWN have to be simultaneously pressed for approx.
  • Page 8 Parameters for the protection of the compressor Para- Function Adjustment range Standard Customer meter setting setting Start protection of the 0...15 min. 0 min. compressor after "cooling on" Start protection after 0...15 min. 5 min. compressor start Start protection after 0...15 min.
  • Page 9 Parameters for alarm- and error conditions Para- Function Adjustment range Standard Customer meter setting setting Hysteresis for alarm contact 1...15 K Minimum limit value -55...0 K -10 K 0= inactive Maximum limit value 0...+99 K 10 K 0= inactive Alarm suppression time after 0...15 Std.
  • Page 10 Parameters for the configuration of the inputs and outputs Para- Function Adjustment range Standard Customer meter setting setting Function of input E1 0: no function 1: start defrosting Switch mode of input E1 0: normally-open contact 1: normally-closed contact Function of input E2 0: no function 1: start defrosting Switch mode of input E2...
  • Page 11 Parameter description: P0: Indication of cold room temperature (F1) P2: Indication of evaporator temperature (F2) The here indicated temperatures present the sum of the respective actual measured value of feeler F1/F2 and the actual value correction according to parameter P1/P3. P1: Calibration sensor F1 P3: Calibration sensor F2 (evaporator) This parameter allows the correction of actual value deviations caused for example by sensor...
  • Page 12 If the compressor has to keep running this can happen either permanently or with a ratio of on and off times, which can be adjusted with parameter c5. The off-time is 15 minutes and not adjustable. c4: Switching delay of the compressor relay If demanded the compressor can switch immediately or with a time delay.
  • Page 13 d9: Execution of defrost demand With d9 = 0 the defrost demand will be prevented as long as the locking conditions of parameters c0, c1 and c2 apply. With d9 = 1 defrosting starts independently of these parameters. During defrosting there is an increase of the refrigerating chamber temperature. This can be specially noticed if there is a high temperature when starting defrosting.
  • Page 14 A1: Minimum limit value A2: Maximum limit value The limit values serve for monitoring of the cold room temperature. They can be relative, i.e. going along with the setpoint S1 or absolute. Alarm is released when exceeding maximum limit value or when falling below the minimum limit value: The actual value display flashes, the buzzer (if available) goes off intermittently and the actual temperature of sensor F1 is indicated (if there is no sensor error).
  • Page 15 F5: Ventilator delay time after defrosting Following drainage time d7, start of the ventilator can be delayed until the evaporator has sufficiently cold air again. If the ventilator started immediately, the warm air resulting from the defrosting process would probably be blown into the refrigerating chamber F6: Ventilator control With F6=0 the ventilator is controlled depending on ventilator setpoint F1 With F6=1 the ventilator control is dynamic.
  • Page 16 Value "Light" "Blue key" Control LED "Red key" "blue key" independent independent see left column independent off with „cooling off“ independent see left column independent independent off with „cooling off“ see left column independent off with „cooling off“ off with „cooling off“ see left column independent independent...
  • Page 17 Y2: Heating/Cooling In operation mode “heating” the output relay is activated if the temperature falls below the setpoint. in operation mode “cooling” it is just the reverse. Y3: Hysteresis The hysteresis is set one-sided below (heating) or above (cooling) the setpoint. Y4: Indication value for lower value at linear analogue input Y5: Indication value for upper value at linear analogue input These parameters assign the indication range to the measuring range.
  • Page 18 LON-Bus, serial communication Definition of the standard network variables (SNVT und SCPT) The standard network variables correspond the type „Refrigerated Display Case Controller“ (with supplementations) and the control object „0“ (minimal requirements with supplementations). Thermostat object (Refrigerated Display Case Controller) Name of variable Type Input/Output...
  • Page 19 Automatic update of variables At each adjustment of the values in the controller the corresponding output variables are updated. If there are no condition changes the values will be updated every “nciMaxSendTime” seconds. If “nciMaxSendTime” is less than 1.0 sec. the values are no more updated in intervals but only if there is any change.
  • Page 20 Data logger protocol Parameter values (read/write) Adjustable parameters: P1,P3,P4,P5,P6,P7,r0,r1,r2,c0,c1,c2,c3,c4,c5,d0,d1,d2,d3,d4,d5,d6, d7,d8,d9,dB,dC,dF,dH,dU,A0,A1,A2,A3,A4,A5,A6,A7,F0,F1,F2,F3,F 4,F5,F6,F7,F8,F9,b0,b1,b2,b3,b4.U1,U2,U3,U4,U5,U6,YA,Y2,Y3,Y4 ,Y5,Y6,Y7,L0,L1,L2,L9,H0,H1,H2,H3,H4,H5,H6,H7,H8.H9,H10,H11, H12,H13,H14,H15,H16,H17.H18,H19,H20,T0 (time) Adjustable setpoints S1,Y1 Actual values (only read) Actual value temperature refrigerating chamber Actual value temperature evaporator Actual value current input Controller status (only read) Bit 0: „cooling on“ Bit 1: „defrosting active“...
  • Page 21 Status messages Message Cause Error elimination Sensor error F1, open or short circuit Check sensor Sensor error F2, open or short circuit Check sensor Data loss at parameter memory Severe hardware error* Network error Check network Ur0-UrF Real time clock error See following table Real time clock error: In case of a real time clock error the exact cause is indicated by the last figure of the display with a...
  • Page 22 Technical data of TRT252-31.34 Input External potential-free switching input, function see parameter b0. Measuring input Resistance thermometer PTC, counter temperature, plug colour white Resistance thermometer PTC, evaporator sensor, plug colour red Measuring range: -55 °C...+99°C Current input 0-20mA Measuring accuracy: 0.5 % of scale range, without sensor Outputs Triac, 4A, 230V ( 0...100 % linear)