Ascon tecnologic TLY26 Operating Instructions Manual Download Page 6

4.8 - EVAPORATOR FANS CONTROL

 

All the parameters concerning fan control are contained in the group 

]

FAn”.

 

The control of the fans on the output configured as “FAn” depending 
on determined control statuses of the instrument and the 
temperature measured by the probe Pr2. 
In the case that the probe Pr2 is not used (parameter “Pr 2” = OFF) 
or in error (E2 o -E2) , the output FAN is activated only depending 
on the parameters “FCOF” and “FEdF”. 
The parameter 

“FCOF”

 decides whether the fans must always be 

switched on independently of the compressor status (“FCOF”=On) 
or be switched off together with the compressor (“FCOF”=OFF). 
The parameter 

“FEdF

” instead decides whether the fans must 

always be switched on independently of the defrosting status 
(“FEdF”=On) or switched off during defrosting (“FEdF”=OFF). 
In this latter case, it is possible to delay the start up of the fans even 
after the end of the defrosting of the time set in the parameter 

“Fd”. 

When the probe Pr2 is used (par. “Pr 2” = on) the fans, as well as 
being conditioned by the parameters “FCOF” and “FEdF”, are also 
conditioned by the temperature control. 
It is possible to set the disablement of the fans when the 
temperature measured by the probe Pr2 is higher than the one set 
in the parameter 

“FLt”

 (temperature too hot) or when it is lower 

than the one set in the parameter 

“Fct”

 (temperature too cold). 

The relative differential that can be set in parameter 

“dF” 

is also 

associated with these parameters

.

 

d F

d F

tim e

F A n

o ff

O N

F c t

P r2

T e m p .

F L t

o ff

o ff

O N

 

 

4.9 - ALARM FUNCTIONS

 

All the parameters concerning the alarm functions are contained in 
group 

]

AL”.

 

The alarm functions of the instrument work on the internal buzzer 
and on the output desired, if configured by the parameters “Out1”, 
“Out2”, “Out3”, “Out4” depending on what is set on the said 
parameters. 
The possible selections of these parameters for the alarm signalling 
function are: 

= ALt

 - when one wants  the output to be activated in alarm and can 

be disabled (alarm silencing) manually by pressing any key of the 
instrument (typical application for sound signal). 

= AL

 - when one wants  the output to be activated in alarm status 

but cannot be disabled manually and are therefore only disabled 
when the alarm status ceases (typical application for a light signal). 

= ALL

 - when one wants  the output to be activated in alarm status 

and that they remain activated even when the alarm has ceased 
(see par.4.9.4) Disablement (recognition of memorised alarm) can 
only be carried out manually by pressing any key when the alarm 
has ended (typical application for light signal). 

= -ALt

 - when one wants the function described as ALt but with an 

inverse function (output activated in normal condition and disabled 
in alarm status). 

= -AL

 - when one wants  the function described as AL but with 

inverse logic (output activated in normal conditions and disabled in 
alarm status). 

= -ALL

 - when one wants the function described as ALL but with 

inverse working logic (output activated in normal conditions and 
disabled in alarm status). 
When no alarms are present, the green LED OK is lit. 
Any active alarm switch on the buzzer and is shown on the 
instrument display with the lighting up of the AL led and the 
switching off of the led OK. 

When the alarm is functioning to stop the buzzer push any of the 
programming key. 
Any silenced or memorised alarm status is shown by the AL led 
flashing. 
The alarm conditions of the instrument are: 
- Probe errors “E1”, “-E1”, “E2, “-E2” 
- temperature alarms “HI” and “LO”  
- External alarms “AL” 
- Open door alarm “AP” 
 

4.9.1 - TEMPERATURE ALARMS

 

The temperature alarms work according to the probe Pr1 
measurements, the type of alarm set in the parameter 

“Aty”

 the 

alarm thresholds set in parameters 

“HAL”

 (maximum alarm) and 

“LAL”

 (minimum alarm) and the relative differential 

“dAL”.

 

Through the parameter “Aty” it is possible to set the alarm 
thresholds “HAL” and “LAL” which must be considered as absolute 
(“Aty”=Ab) or relative to the active  Set Point (“Aty”=dE). 
Using some  parameters  it is also possible to delay the enablement 
and the intervention of these alarms. 
These parameters are: 

“PAL”

 - is the temperature alarm exclusion time on switching on the 

instrument if the instrument is in alarm status when it is switched on. 

“dALd”

 - is the temperature alarm exclusion time at the end of 

defrosting (and , if programmed, at the end of draining) 

"dALc"

 - is the temperature alarm exclusion time at the end of a 

continuous cycle. 

“ALd”

 - is the temperature alarm delay activation time 

The temperature alarm is enabled at the end of exclusion time and 
is enabled after the “ALd” time when the temperature measured  by 
the probe Pr1 exceeds or goes below the respective maximum and 
minimum alarm thresholds. 
The alarm thresholds will be the same as those set on the 
parameters “HAL” and LAL” if the alarms are absolute (“Aty”=Ab)  

d A L

d A L

t im e

A L

o f f

O N

L A L

H I

H A L

T e m p .

P r 1

L O

o f f

o f f

O N

 

or will be the values  [”SP”+”HAL”] and [”SP”+”LAL”] if the alarms 
are relative (“Aty”=dE). 

t im e

d A L

d A L

A L

o f f

O N

H I

L A L

S P

H A L

T e m p .

P r 1

L O

o f f

o f f

O N

 

The maximum and minimum temperature alarms can be disabled by 
setting the relative parameters "HAL" and "LAL" = OFF.  
At the same time as the signalling of the configured alarm (buzzer 
and/or output), the instrument signals the alarm by turning on the 
led light AL, switching off the LED OK, turning on the led - in case  
of minimum alarm or the led + for maximum alarm, and visualises 
on the display: 
- Alternately 

HI

 and the set variable in parameter “diSP” for 

maximum alarm  
- Alternately 

LO

 and the set variable in parameter “diSP” for the 

minimum alarm 
 

4.9.2 - EXTERNAL ALARM

 

The instrument can signal an external alarm by activating the digital 
input with the function programmed as “diF” = 4 or 9 (see par. 4.10). 

Ascon Tecnologic - TLY26

 

- OPERATING INSTRUCTIONS - Vr. 02 - 04/14 - ISTR MTLY26ENG02 - PAG. 6

 

Summary of Contents for TLY26

Page 1: ... 2 OUTPUTS CONFIGURATION 4 3 TEMPERATURE CONTROL 4 4 CONTINUOUS CYCLE FUNCTION 4 5 COMPRESSOR PROTECTION FUNCTION AND DELAY AT POWER ON 4 6 DEFROST CONTROL 4 7 MANUAL DEFROST 4 8 EVAPORATOR FANS CONTROL 4 9 ALARM FUNCTIONS 4 9 1 TEMPERATURE ALARMS 4 9 2 EXTERNAL ALARM 4 9 3 OPEN DOOR ALARM 4 9 4 ALARM MEMORY 4 10 DIGITAL INPUT 4 11 AUXILIARY OUTPUT 4 12 FUNCTION OF KEYS U AND DOWN AUX 4 13 RS 485 ...

Page 2: ...d rapidly Exiting the Set mode is achieved by pressing the P key or automatically if no key is pressed for 15 seconds After that time the display returns to the normal function mode 2 2 PARAMETERS PROGRAMMING To access the instrument s function parameters press the key P and keep it pressed for about 5 seconds after which the SET led will light up the display will visualised the code that identifi...

Page 3: ...nstallation if necessary using proper filters Whenever a failure or a malfunction of the device may cause dangerous situations for persons thing or animals please remember that the plant has to be equipped with additional devices which will guarantee safety 3 2 MECHANICAL MOUNTING The instrument in case 33 x 75 mm is designed for flush in panel mounting Make a hole 29 x 71 mm and insert the instru...

Page 4: ...on differential HSEt and the function mode Func Depending on the function mode programmed on the parameter Func the differential is automatically considered by the regulator with positive values for a Refrigeration control Func CooL or with negative values for a heating control Func HEAt Out SP off ON HEAt Out time HSEt SP Temp HSEt time CooL ON ON ON ON ON off off off Pr1 Pr1 Temp In the event of...

Page 5: ... is not reached in the time set in the parameter dEFE defrosting is interrupted In order to avoid pointless defrosting the parameter tSdF is foreseen that sets the enablement temperature for defrosting If the temperature measured by the probe is higher than the one set in the parameter tSdF and in the parameter tEdF the defrosting is inhibited NO def defrost tEdF dEF off ON tSdF dint 1 Pr2 Temp de...

Page 6: ...d in normal conditions and disabled in alarm status ALL when one wants the function described as ALL but with inverse working logic output activated in normal conditions and disabled in alarm status When no alarms are present the green LED OK is lit Any active alarm switch on the buzzer and is shown on the instrument display with the lighting up of the AL led and the switching off of the led OK Wh...

Page 7: ...abled the alarm is activated and the instrument visualises AL and the variable set in parameter diSP alternately on the display 10 Switching on switching off Stand by of instrument with contact normally open on closing the input and after the did time the instrument is switched on while it is placed in Stand by when opened 1 defrosting commencement command with contact normally closed similar to d...

Page 8: ... is made to enter the programming from the keyboard whilst a communication through the serial port is in progress the instrument will visualise buSy to indicate the busy state 4 14 ACCESSORIES 4 14 1 PARAMETERS CONFIGURATION BY KEY A01 The instrument is equipped with a connector that allows the transfer from and toward the instrument of the functioning parameters through the device ASCON TECNOLOGI...

Page 9: ...y Lock OFF display free On Lock on tempera ture Pr1 before defrost Lb Lock on label dEF during defrosting and PdEF during post defrosting On OFF Lb OFF 34 Etdu Differential display unlock after defrost 0 30 C F 2 0 Group FAn parameters relative to evaporator fan control Par Description Range Def Note 35 FCOF Fan status with compressor off On OFF On 36 FEdF Fan status during defrost On OFF OFF 37 F...

Page 10: ...active Set Point 4 Switch on Switch off Stand by OFF 1 2 3 4 OFF 64 USrb Function mode key U see Fbd OFF 1 2 3 4 OFF 65 PASS Access Password to parameter functions OFF 9999 OFF Group SEr parameters relative to the serial communication Par Description Range Def Note 66 Add Station address in case of serial communication 0 255 1 Group CLO parameters relative to the internal clock Par Description Ran...

Page 11: ...VDE Sampling rate 130 ms Installation category II Serial Interface RS485 insulated Measurement category I Communication protocol MODBUS RTU JBUS Protection class against electric shock Class II for Front panel Baud rate 9600 baud Insulation Reinforced insulation between the low voltage part relay outputs and front panel Reinforced insulation between the low voltage section relay outputs and the ex...

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