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Störk-Tronic TRT252-31.34, Схема подключения, Страница: 18 / 22

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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 

Values 

Description 

nvoThermState 

SNVT_state 

Output 

Bit 0: ON 
Bit 1: cooling  
Bit 2: OFF 
Bit 3: night reduct. 

Status thermostat: 
cooling and night 
time reduction 

nvoAirTemp SNVT_temp_p 

Output -100...+150°C 

0x7fff: sensor error 

room temperature 

nvoDischargeTemp SNVT_temp_p 

Output 

-100...+150°C 
0x7fff: sensor error 

evaporator 
temperature 

nvoCutoutTemp SNVT_temp_p Output 

-100...+150°C 

setpoint 

output 

nvoDefrostState SNVT_defr_state 

Output 

DF_STANDBY 
DF_DEFROST 
DF_DRAINDOWN 

defrost condition 

nvoDayNight* 

SNVT_lev_disc 

Output 

ST_OFF/ST_ON 

night time operat. 

nvoActState* 

SNVT_state 

Output 

Bit 0: compressor 
Bit 1: ventilator 
Bit 2: defrost  
Bit 3: alarm 

switching conditions 

nvoSwitch SNVT_lev_disc 

Output 

ST_OFF/ST_ON 

-reserved- 

nviDayNight SNVT_lev_disc 

Input  ST_OFF/ST_ON 

external 

night 

time 

reduction 

nviCutoutTemp* SNVT_temp_p Input 

-100...+150°C 

setpoint 

nviDefrostState SNVT_defr_state 

Input 

DF_STANDBY 
DF_DEFROST 

defrost demand 

nviSwitch SNVT_lev_disc 

Input ST_OFF/ST_ON 

-reserved- 

nviPower SNVT_lev_disc 

Input 

ST_OFF/ST_ON 

controller 

condition 

 

(on / standby) 

nciMaxSendTime 

SNVT_time_sec 

Input 

0...32000s 

max. time to update 
variables 

„Object 0“ 

nvoStatus 

SNVT_obj_status  Output 

-> SNVT list 
invalid_id 
invalid_request 

Object status 
(min. requirements.) 

nciNetConfig SNVT_config_src 

Input 

CFG_EXTERNAL 
CFG_LOCAL 

Node configured 
extern or intern 

nvoAlarm 

SNVT_alarm 

Output 

see below*** 

alarm condition 

nviRequest SNVT_obj_reque

st 

Input 

-> SNVT Liste 

Object Request 

 
* SNVTs, which are added to the corresponding standard object. 
 
*** The unit has two different alarm conditions: 
Hardware error (sensor error, clock, Eeprom error):  

alarm_type=0x83; priority_level=2 

Temperature error (too high or too low temperature):     

alarm_type=0x82; priority_level=1 

 

 

Содержание TRT252-31.34

Страница 1: ...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 an...

Страница 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 ...

Страница 3: ...sed for at least half a second The lamp in the display lights up if cooling is switched off and the unit is in standby mode Key StandBy With this key the controller is switched to standby mode Pressing the key a second time restarts the unit The LED lights up if the controller is in standby mode all other displays are switched off Switching on the unit activates the time display The condition of s...

Страница 4: ...th the keys UP and DOWN Please note that the setpoint can only be changed within the set setpoint limits The time can be adjusted with the SET time key in the same way General reference Note that the value is transferred to the captive memory and is safe also after power failure Para meter Function Adjustment range Standard setting Customer setting S1 Cold room setpoint S1 Please note during night...

Страница 5: ...P0 Indication of cold room temperature sensor F1 P2 Indication of evaporator temperature H00 actual weekday 1 Sunday 2 Monday 3 Tuesday 4 Wednesday 5 Thursday 6 Friday 7 Saturday H01 Defrost time 1 00 00 24 00 24 00 inactive 24 00 H02 Defrost time 2 00 00 24 00 24 00 inactive 24 00 H03 Defrost time 3 00 00 24 00 24 00 inactive 24 00 H04 Defrost time 4 00 00 24 00 24 00 inactive 24 00 H05 Defrost t...

Страница 6: ...defrost times of the real time clock are used the defrost interval parameter d0 should be set to 0 H6 Night time reduction H07 H20 Start and end times of night time reduction The night time reduction is activated by the clock according to the start and end times set with parameters H7 H20 During the reduction the parameter S1 is effective for the control S1 is the sum of S1 daytime setpoint and H6...

Страница 7: ... Parameters for controller specifications Para meter Function Adjustment range Standard setting Customer setting P0 Indication of cold room temperature sensor F1 N A N A P1 Calibration sensor F1 actual value correction 9 9 9 9 K 0 0 K P2 Indication of evaporator temperature sensor F2 N A N A P3 Calibration sensor F2 actual value correction 9 9 9 9 K 0 0 K P4 Sensor type F1 1 KTY 2 PT1000 3 NTC 1 P...

Страница 8: ...lectrical 1 with hot gas 0 d2 Defrosting temperature 55 99 C 10 C d3 Defrosting time limit 1 99 min 30 min d4 Function after cooling on 0 immediate cooling no defrost 1 first defrosting then cooling 0 d5 Defrost delay after cooling on 0 30 min 0 min d6 Indication of the cold room temperature during defrosting 0 actual temperature 1 temperature determined just before the start of defrosting 0 d7 Dr...

Страница 9: ...on Adjustment range Standard setting Customer setting F0 Ventilator control 0 dependent on temperature 1 continuous on 0 F1 Ventilator setpoint 99 99 C 1 C F2 Switching hysteresis ventilator 2 15 K 2 K F3 Behaviour at compressor stop 0 ventilator independent of compressor 1 ventilator off together with compressor 1 F4 Behaviour at defrosting 0 ventilator independent of defrosting 1 ventilator off ...

Страница 10: ...unction output K2 0 8 see U1 1 U3 Function output K3 0 8 see U1 2 U4 Function output K4 0 8 see U1 3 U5 Function output K5 0 8 see U1 4 U6 Function output K6 0 8 see U1 5 YA Activation 0 not active 1 0 20mA 2 4 20mA 0 Y0 Indication of actual value N A N A Y1 Setpoint Y6 Y7 0 Y2 Heating cooling 0 heating 1 cooling 0 Y3 Hysteresis 0 1 15K 1 Y4 Indication value 0 4mA 99 999 0 0 Y5 Indication value 20...

Страница 11: ...d above the setpoint r1 Setpoint limitation minimum r2 Setpoint limitation maximum These parameters limit the adjustment range of the setpoint S1 in order to avoid that the end user sets inadmissible values for the plant c0 Start protection of the compressor after cooling on After cooling is switched on e g by switching on the mains voltage the start of the compressor is retarded until the protect...

Страница 12: ...e defrosting is terminated even if the evaporator is not warm enough to be ice free d4 Function after cooling on After cooling on cooling can start immediately and defrosting starts after the defrost interval or defrosting can start immediately and then the defrost interval is started For deep freezing applications the immediate defrosting is recommended since a defrost cycle might be skipped in c...

Страница 13: ...efrost start can be realised The parameter dH pre vents the controllers from switching back from defrosting to cooling mode at different times If dH is set to 1 the starting of the compressor is delayed until the time d3 defrosting time limit expires dU start manual defrosting only required in combination with data logger With dU 1 the defrost interval is started prematurely The following automati...

Страница 14: ... night time reduction After each switching process of the night time reduction activation or deactivation the alarm is suppressed for this time period In general the ventilator is supposed to be connected to the evaporator and the corresponding temperatures are determined by the evaporator sensor F0 Ventilator control At setting 0 the control is dependent of temperature with the ventilator setpoin...

Страница 15: ...y of the evaporator F7 Ventilator revolution number during normal cooling operation F8 Ventilator revolution number during night time reduction F9 Ventilator revolution number during defrosting The ventilator speed can be set infinitely variable by the software In Off condition the ventilator speed is reduced to 0 Irrespective of this setting there is always a kick start for the ventilator i e it ...

Страница 16: ...ff 21 off with cooling off independent see left column off with cooling off 22 independent off with cooling off see left column off with cooling off 23 off with cooling off off with cooling off see left column off with cooling off 24 independent Adjusting Y1 like U parameter 8 independent 25 off with cooling off Adjusting Y1 like U parameter 8 independent 26 independent Adjusting Y1 like U paramet...

Страница 17: ...ss and subnet address with Domain 0 The address of the knot can only be changed if the knot was not tied externally SNVT nciNetConfig CFG_LOCAL otherwise the changed value is not saved after releasing the set key the old value is reset L2 Number of Slaves This is the number of slaves which have to receive a defrost demand via the network The slave addresses start with controller address L0 1 L9 Lo...

Страница 18: ...put Bit 0 compressor Bit 1 ventilator Bit 2 defrost Bit 3 alarm switching conditions nvoSwitch SNVT_lev_disc Output ST_OFF ST_ON reserved nviDayNight SNVT_lev_disc Input ST_OFF ST_ON external night time reduction nviCutoutTemp SNVT_temp_p Input 100 150 C setpoint nviDefrostState SNVT_defr_state Input DF_STANDBY DF_DEFROST defrost demand nviSwitch SNVT_lev_disc Input ST_OFF ST_ON reserved nviPower ...

Страница 19: ... be updated immediately if there is a change at the master controller If the setpoint is changed at the slave controller the correct value will be send to the slave after nciMaxSendTime seconds Connection information Simultaneously pressing all keys sends a Service Pin message the program version of the software is indicated in the display The controller responds to a wave command with a display f...

Страница 20: ...us only read D1 Bit 0 cooling on Bit 1 defrosting active Bit 2 night time reduction Bit 3 controller on Bit 4 compressor Bit 5 defrost relay Bit 6 light Bit 7 switching condition blue key Bit 8 switching condition red key Bit 9 ventilator on Bit 10 switching condition current input U parameter 7 Bit 11 switching condition current input U parameter 8 Bit 12 Switching input 1 Bit 13 Switching input ...

Страница 21: ...rs are indicated with a flashing display and the buzzer sounds If the display indicates a EP error the controller has located undesirable change of the parameter settings in the EEprom This indication can not be cancelled The controller has to be exchanged immediately In this case the compressor and the ventilator switch to emergency operation 15 min on 15 min off Common problems Setting of the ve...

Страница 22: ...ith 6 3A T fuse see parameter U5 Relays K1 up to K5 are potential afflicted Additional buzzer 85dB Display One 3 digit LED Display height 13mm for temperature display colour red including the switching condition display for the output relays One 4 digit LED Display height 13 mm colour red for internal real time clock 8 LEDs for status display LON communication interface shielded 2 wire line Twiste...

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