background image

= 2

 - Pressing the key for at least 1 second, it is possible to 

enable/disable a continuous cycle (see continuous cycle function). 

= 3

 - Pressing the key for at least 1 second, it is possible to select 

one of the 2 memorised set point in rotation. Once selection has 
been made, the display will flash the active set point code for about 
1 s (SP 1or SP 2). 

= 4

 - Pressing the key for at least 1 second, it is possible to switch the 

instrument from the ON status to Stand-by status and vice versa. 
 

4.13 - RS 485 SERIAL INTERFACE 

The instrument can be equipped with a RS 485 serial 
communication interface, by means of which it is possible to 
connect the regulator with a net to which other instruments 
(regulators of PLC) are connected, all depending typically on a 
personal computer used as plant supervisor. Using a personal 
computer it is possible to acquire all the function information and to 
program all the instrument’s configuration parameters. The software 
protocol adopted for TLY 26 is a MODBUS RTU type, widely used 
in several PLC and supervision programs available on the market 
(TLY series protocol manual is available on request). 
The interface circuit allows the connection of up to 32 instruments 
on the same line. 
To maintain the line in rest conditions  a 120 Ohm resistance (Rt) 
must be connected to the end of the line. 
The instrument is equipped with two terminals called A and B which 
have to be connected with all the namesake terminals of the net. 
For the wiring operation they must be interlaced with a double cable 
(telephonic type).  
Nevertheless, particularly when the net results very long or noised and 
being present potential differences between the GND terminals, it is 
advisable to adopt a screened cable wired as in the drawing. 

TLY26 n.2

TLY26 n.1

7

GND

8

A

B

9

A

B

TLY26 n.N

GND

A

GND

B

shield

A

Interface

RS485

GND

B

HOST

(PC/PLC)

120 ohm

Rt

7

8

9

7

8

9

 

If the instrument is equipped with a serial interface, the parameter to 
be programmed are the following present in the parameters group   

]

SEr”

 : 

"Add"

: Address of the station. Set a different number for each 

station, from 1 to 255. 

Note: 

The baud-rate are fixed at 9600 baud. 

If an attempt 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 TECNOLOGIC A01

 with 

5 poles

 

connector. 
This device it is mainly useable for the serial programming of the 
instruments which need to have the same parameters configuration 
or to keep a copy of the programming of an instrument and allow its 
rapid retransmission. 
To use the A01 device it is necessary that the device or instrument 
are being supplied. 

 

Instrument supplied and device not supplied 

SUPPLY

 

Instrument supplied from the device 

SUPPLY ADAPTER

12 VDC

AC SUPPLY 

 

For additional info, please have a look at the KEY01 instruction 
manual. 
 
4.14.3 - “TVRY” REMOTE DISPLAY 

If is present the special output it is possible to connect to the 
instrument the remote display 

ASCON TECNOLOGIC TVR Y

 with 3 

wires connection (3S) through a cable that can have a maximum 
length of 10 m. 
The device TVR Y, directly supplied by the instrument, it allows to 
visualize the temperature measured by the probe Pr1 through a 2 ½ 
digit display. 

cable 10 m MAX.

TVR Y (3S)

SUPPLY

+

-

S

+

S

-

 

For additional info, please have a look at the TVR Y instruction 
manual. 
 

5 - PROGRAMMABLE PARAMETERS TABLE

 

 
Here below is a description of all the parameters available on the 
instrument. Some of them may not be present, either due to the fact 
they depend on the type of instrument or because they are 
automatically disabled as unnecessary.

 

Group 

]

SP 

(parameters relative to Set Point) 

Par.

 

Description

 

Range

 

Def.

 

Note

SPAt

Active Set point  

1 ÷ 2 

 

SP1

  Set Point 1 

SPLL ÷ SPHL

0.0 

 

SP2

  Set Point 2 

SPLL ÷ SPHL

0.0 

 

SPLL

Minimum Set Point  

-58 ÷ SPHL 

-50.0   

SPHL

Maximum Set Point  

SPLL ÷ 302 

100.0  

Group 

]

InP 

(parameters relative to measuring inputs) 

Par.

 

Description

 

Range

 

Def.

 

Note

 

SEnS

Probes Type 

Ptc - ntc 

Ptc 

 

OFS1

Pr1 Probe (cell) 
Calibration 

-30 ÷ 30 

°C/°F 

0.0  

OFS2

Pr2 Probe (evaporator) 
Calibration 

-30 ÷ 30 

°C/°F 

0.0  

Pr 2

  Pr2 Probe Presence 

(evaporator) 

On - OFF 

On 

 

10

Unit

  Unit of measurement 

°C -°F 

°C 

 

11

dP

 

Decimal point 

On - OFF 

On 

 

Ascon Tecnologic - TLY26

 

- OPERATING INSTRUCTIONS - Vr. 02 - 04/14 - ISTR MTLY26ENG02 - PAG. 8

 

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...

Reviews: