Tecnologic TLK 38 Operating Instructions Manual

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TLK 38

MICROPROCESSOR-BASED

DIGITAL

ELECTRONIC CONTROLLER

OPERATING INSTRUCTIONS

Vr. 03 (ENG) - cod.: ISTR 06519

TECNOLOGIC S.p.A.

Distributed by:

GESINT S.R.L.

internet : http:\\www.

gesintsrl

.it

e-mail: info@

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FOREWORD

This manual contains the information necessary for the product to

be installed correctly and also instructions for its maintenance and
use; we therefore recommend that the utmost attention is paid to

the following instructions.
Though this manual has been issued with the greatest care,

TECNOLOGIC S.p.A. will not take any responsibility deriving from
its use.

The same applies to each person or Company involved in the
issuing of this manual.

This document is the exclusive property of TECNOLOGIC S.p.A.
which forbids any reproduction and divulgation , even in part, of the

document, unless expressly authorized.
TECNOLOGIC S.p.A. reserves the right to make any formal or

functional changes at any moment and without any notice.

INDEX

INSTRUMENT ORDERING CODE

7.6

MEASUREMENT RANGE TABLE

7.5

FUNCTIONAL DATA

7.4

MECHANICAL DIMENSIONS, PANEL CUT-OUT AND
MOUNTING

7.3

MECHANICAL DATA

7.2

ELECTRICAL DATA

7.1

TECHNICAL DATA

GUARANTEE AND REPAIRS

6.3

CLEANING

6.2

ERROR SIGNALLING

6.1

PROBLEMS , MAINTENANCE AND GUARANTEE

PROGRAMMABLE PARAMETERS TABLE

PARAMETERS CONFIGURATION BY KEY01

4.13

FUNCTION OF KEY “U”

4.12

LOOP BREAK ALARM FUNCTION

4.11

ALARMS OUTPUTS FUNCTIONS

4.10

SOFT-START FUNCTION

4.9

REACHING OF SET POINT AT CONTROLLED SPEED

AND AUTOMATIC COMMUTATION BETWEEN TWO
SET POINTS

4.8

AUTO-TUNING AND SELF-TUNING FUNCTIONS

4.7

DOUBLE ACTION PID CONTROL

4.6

SINGLE ACTION PID CONTROL

4.5

NEUTRAL ZONE ON/OFF CONTROL

4.4

ON/OFF CONTROL

4.3

OUTPUTS CONFIGURATION

4.2

MEASURING AND VISUALIZATION

4.1

FUNCTIONS

ELECTRICAL WIRING DIAGRAM

3.4

ELECTRICAL CONNECTIONS

3.3

MECHANICAL MOUNTING

3.2

PERMITTED USE

3.1

INFORMATION ON INSTALLATION AND USE

ACTIVE SET POINT SELECTION

2.5

CONTROL STATES

2.4

PARAMETER PROGRAMMING LEVELS

2.3

SELECTION OF CONTROL STATE AND PARAMETER

PROGRAMMING

2.2

FAST PROGRAMMING OF SET POINT

2.1

PROGRAMMING

FRONT PANEL DESCRIPTION

1.2

GENERAL DESCRIPTION

1.1

INSTRUMENT DESCRIPTION

1 - INSTRUMENT DESCRIPTION

1.1 - GENERAL DESCRIPTION

TLK 38 is a “single loop” digital microprocessor-based controller,
with ON/OFF, Neutral Zone ON/OFF, PID single action, PID dual
action (direct and reverse) control and with

AUTO-TUNING FAST

function,

SELF-TUNING

function and automatic calculation of the

FUZZY OVERSHOOT CONTROL

parameter for PID control. The

PID control has a particular algorithm with

TWO DEGREES OF

FREEDOM

that optimises the instrument’s features independently

in the event of process disturbance and Set Point variations. The
process value is visualized on 4 red displays, while the output

status is indicated by 2 LED displays. The instrument is equipped
with a 3 LED programmable shift indexes. The instrument provides

for the storage of 4 Set Points and can have up to 2 outputs: relay
type or can drive solid state relays type (SSR).

Depending on the model required the input accept:

: Thermocouples temperature probes (J,K,S and TECNOLOGIC

IRS Infrared sensors), mV signals (0..50/60 mV, 12..60 mV),

Thermoresistances PT100.

: Thermocouples temperature probes (J,K,S and TECNOLOGIC

IRS Infrared sensors), mV signals (0..50/60 mV, 12..60 mV),

Thermistors PTC and NTC.

: normalized analogue signals 0/4..20 mA

: normalized analogue signals 0..1 V, 0/1..5 V, 0/2..10 V

Other important available functions are: Loop-Break Alarm function,

reaching of the Set Point at controlled speed, ramp and dwell

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function, Soft-Start function, protection compressor function for
neutral zone control, parameters protection on different levels.

1.2

FRONT PANEL DESCRIPTION

OUT1

TLK 38

AT
ST

OUT2

1 - Key P

: This is used to access the programming parameters

and to confirm selection.

2 - Key DOWN

: This is used to decrease the values to be set and

to select the parameters. If the key is held down, the user returns to

the previous programming level until he exits the programming
mode.

3 - Key UP

: This is used to increase the values to be set and to

select the parameters. If the key is held down, the user returns to

the previous programming level until he exits the programming
mode. Outside the programming mode it permits visualisation of

the output control power.

4 - Key U

: This is a key with a function programmable by par.

“USrb”. It can be set to : Activate Auto-tuning and Self-tuning

functions, swap the instrument to manual control, silence the alarm,
change the active Set Point, deactivate control (see par. 4.12) and

modify the visibility of the parameters in “ConF” menu (see par.
2.3).

5 - Led OUT1

: indicates the state of output OUT1

6 - Led OUT2

: indicates the state of output OUT2

7 - Led SET

:It indicates access to the programming mode and

parameter programming level.

8 - Led AT/ST

: indicates that the Self-tuning function is activated

(light on) or that Auto-tuning (flashing ) is in progress.

9 - Led – Shift index:

indicates that the process value is lower than

the one programmed on par. “AdE”.

10 - Led = Shift index:

indicates that the process value is within

the range [SP+AdE ... SP-AdE]

11 - Led + Shift index:

indicates that the process value is higher

than the one set on par. “AdE”.

2 - PROGRAMMING

.1 - FAST PROGRAMMING OF THE SET POINT

This procedure permits rapid programming of the active Set Point
and possibly the alarm thresholds (see par 2.3)
Push key “P”, then release it and the display will visualise

“SP n”

(where n is the number of the Set Point active at that moment)
alternatively to the programmed value.

To modify the value, press “UP” key to increase it or the “DOWN”
key to decrease it.

These keys change the value one digit at a time but if they are
pressed for more than one second, the value increases or

decreases rapidly and, after two seconds in the same condition, the
changing speed increases in order to allow the desired value to be

reached rapidly.
Once the desired value has been reached, by pushing key P it is

possible to exit by the fast programming mode or it is possible to
visualise the alarm thresholds (see par. 2.3).

To exit the fast Set programming it is necessary to push key P,
after the visualisation of the last Set Point, or alternatively, if no key

is pressed for approx. 15 seconds, the display will return to normal
functioning automatically.

2.2 - SELECTION OF THE CONTROL STATE AND PARAMETER
PROGRAMMING

By pushing key "P" and holding it down for approx. 2 sec. it is

possible to enter into the main selection menu.
Using the "UP" or DOWN” keys, it is then possible to roll over the

selections:

to enter into the operating parameters menu

"OPEr"

to swap the regulator to the manual control state and

therefore to program the % control value using the
“UP” and “DOWN” keys

"OPLO"

to activate the Auto-tuning or Self-tuning function

"tunE"

to swap the regulator into the automatic control state

"rEG"

to swap the regulator into the OFF state

"OFF"

to enter into the configuration parameters menu

"ConF"

Once the desired item has been selected, push key “P” to confirm.
Selecting "OPEr" and "ConF" gives the possibility of accessing

other menus containing additional parameters and more precisely :

"OPEr" -

Operating parameters Menu: this normally contains the

Set Point parameters but it can contain all the desired parameters

(see par. 2.3).

"ConF" -

Configuration parameters Menu: this contains all the

operating parameters and the functioning configuration parameters

(alarm configuration, control, input, etc.)

S E L F T U N IN G

A U T O T U N IN G

A T
S T

2 s e c .

H o ld fo r

"O F F "

"rE G "

"O P L O "

To enter the menu

“ConF”

select the option “ConF”, press the key

“P” and the display will show “0”.

At this request, enter, using keys “UP” and “DOWN”, the number
reported on the last page of this manual and push key “P”.

If an incorrect password is entered, the instrument exit from
programming mode.

If the password is correct, the display will visualise the code
identifying the first group of parameters (“

]

“) and with keys “UP”

and “DOWN” it will be possible to select the desired group of

parameters.
Once the desired group of parameters has been selected, the code

identifying the first parameter of the selected group will be
visualised by pushing the “P” key.

Again using the “UP” and “DOWN” keys, it is possible to select the
desired parameter and, if the key “P” is pressed, the display will

alternatively show the parameter’s code and its programming value,
which can be modified by using the “UP” or “DOWN” keys.

Once the desired value has been programmed, push key “P” once
more: the new value will be memorised and the display will show

only the code of the selected parameter.
By using the “UP” or “DOWN” keys, it is then possible to select a

new parameter (if present) and modify it as described above.
To select another group of parameters, keep the “UP” or “DOWN”

key pressed for approx. 2 sec., afterwards the display will return to
visualise the code of the group of parameters.

Release the key and by using the “UP” and “DOWN” keys, it will be
possible to select a new group.

To exit the programming mode, no key should be pressed for
approx. 20 seconds, or keep the “UP” or “DOWN” pressed until exit

from the programming mode is obtained.

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The programming and exit modes for the “OPEr” menu are the
same as those described for menu “ConF” with the difference that

to access the menù "OPEr" the Password is not required.

Longer

Hold

2 sec.

Hold for

2 sec.

Hold for

ATTENTION:

The instrument is programmed in factory with all the

parameters, to exception of the Set Point "SP1" (and 2,3,4),
programmable in the menù "ConF" to the purpose to prevent wrong
accidental programming from non experienced consumers.

2.3 - PARAMETERS PROGRAMMING LEVELS

The menu “OPEr” normally contains the parameters used to

program the Set Point; however it is possible to make all desired
parameters appear or disappear on this level, by following this

procedure:
Enter the menu “ConF” and select the parameter to be made

programmable or not programmable in the menu “OPEr”.
Once the parameter has been selected, if the LED SET is switched

off, this means that the parameter is programmable only in the
menu “ConF”, if instead the LED is on, this means that the

parameter is also programmable in the menu “OPEr”.
To modify the visibility of the parameter, push key “U” : the LED

SET will change its state indicating the parameter accessibility level
(on = menu ”OPEr” and “ConF”; off = menu “ConF” only).

The active Set Point and the alarm thresholds will only be visible on
the Set Point fast programming level (described in par. 2.1) if the

relative parameters are programmed to be visible (i.e. if they are
present in the menu “OPEr”).

The possible modification of these Sets, with the procedure
described in par. 2.1, is instead subordinate to what is programmed
in par.

“Edit”

(contained in the group “

]

PAn

“).

This parameter can be programmed as :
=SE : The active Set Point can be modified while the alarm

thresholds cannot be modified.
=AE : The active Set Point cannot be modified while the alarm

thresholds can be modified
=SAE : Both the active Set Point and the alarm thresholds can be

modified
=SAnE : Both the active Set Point and the alarm thresholds cannot

be modified

2.4 - CONTROL STATES

The controller can act in 3 different ways : automatic control

(rEG),

control off

(OFF)

and manual control

(OPLO).

The instrument is able to pass from one state to the other :
- by selecting the desired state from the main selection menu suing

the keyboard.
- By using the key “U” on the keyboard; suitably programming par.

“USrb” (“USrb” = tunE; “USrb” = OPLO; “USrb” = OFF) it is possible
to pass from “rEG” state to the state programmed on the parameter

and vice versa.
- Automatically (the instrument swaps into "rEG" state at the and of

the auto-tuning execution)
When switched on, the instrument automatically reassumes the

state it was in when it was last switched off.

AUTOMATIC CONTROL (rEG)

– Automatic control is the normal

functioning state of the controller.

During automatic control it is possible to visualize the control power
on the display by pushing key “UP”.

The range of the power values goes from H100 (100% of the output
power with reverse action) to C100 (100% of the output power with

direct action).

CONTROL OFF (OFF)

– The instrument can be swapped into the

“OFF” state, i.e. the control and the relative outputs are
deactivated.

The alarm outputs are instead working normally.

BUMPLESS MANUAL CONTROL (OPLO)

– By means of this

option it is possible to manually program the power percentage

given as output by the controller by deactivating automatic control.
When the instrument is swapped to manual control, the power

percentage is the same as the last one supplied and can be
modified using the “UP” and “DOWN” keys.

As in the case of automatic control, the programmable values
range from H100 (+100%) to C100 (-100%).

To return to automatic control, select "rEG" in the selection menu.

2.5 - ACTIVE SET POINT SELECTION

This instrument permits pre-programming of up to 4 different Set
points (

“SP1”

“SP2”

“SP3”

“SP4”

) and then selection of which

one must be active. The maximum number of Set points is
determined by the par.

"nSP"

located in the group of parameters “

]

“.

The active Set point can be selected :
- by parameter

"SPAt"

in the group of parameters “

]

“.

- by key “U” if par. "USrb" = CHSP

- Automatically between SP1 and SP2 if a time “dur.t” (see par. 4.8)
has been programmed.

Set Points “SP1”, “SP2”, “SP3”, “SP4” will be visible depending on
the maximum number of Set Points selected on par. “nSP” and they

can be programmed with a value that is between the value
programmed on par.

“SPLL”

and the one programmed on par.

“SPHL”.

Note

: in all the following examples the Set point is indicated as

"SP", however the instrument will act according to the Set point
selected as active.

3 - INFORMATION ON INSTALLATION AND USE

3.1 - PERMITTED USE

The instrument has been projected and

manufactured as a measuring and control device to
be used according to EN61010-1 for the altitudes

operation until 2000 ms.The use of the instrument
for applications not expressly permitted by the

above mentioned rule must adopt all the necessary protective
measures. The instrument CANNOT be used in dangerous

environments (flammable or explosive) without adequate
protection. The installer must ensure that EMC rules are respected,

also after the instrument installation, 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 instrument, fixing
it with the provided special bracket. We recommend that the gasket

is mounted in order to obtain the front protection degree as
declared. Avoid placing the instrument in environments with very

high humidity levels or dirt that may create condensation or
introduction of conductive substances into the instrument. Ensure

adequate ventilation to the instrument and avoid installation in
containers that house devices which may overheat or which may

cause the instrument to function at a higher temperature than the
one permitted and declared. Connect the instrument as far away as

possible from sources of electromagnetic disturbances such as
motors, power relays, relays, solenoid valves, etc.

3.3 - ELECTRICAL CONNECTION

Carry out the electrical wiring by connecting only one wire to each

terminal, according to the following diagram, checking that the
power supply is the same as that indicated on the instrument and

that the load current absorption is no higher than the maximum
electricity current permitted. As the instrument is built-in equipment

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with permanent connection inside housing, it is not equipped with
either switches or internal devices to protect against overload of

current: the installation will include an overload protection and a
two-phase circuit-breaker, placed as near as possible to the

instrument, and located in a position that can easily be reached by
the user and marked as instrument disconnecting device which

interrupts the power supply to the equipment. It is also
recommended that the supply of all the electrical circuits connected

to the instrument must be protect properly, using devices (ex.
fuses) proportionate to the circulating currents. It is strongly

recommended that cables with proper insulation, according to the
working voltages and temperatures, be used. Furthermore, the

input cable of the probe has to be kept separate from line voltage
wiring. If the input cable of the probe is screened, it has to be

connected to the ground with only one side. Whether the
instrument is 12 V version it’s recommended to use an external

transformer TCTR, or with equivalent features, and to use only one
transformer for each instrument because there is no insulation

between supply and input. We recommend that a check should be
made that the parameters are those desired and that the

application functions correctly before connecting the outputs to the
actuators so as to avoid malfunctioning that may cause

irregularities in the plant that could cause damage to people, things
or animals.

Tecnologic S.p.A. and its legal representatives do not assume
any responsibility for any damage to people, things or animals
deriving from violation, wrong or improper use or in any case
not in compliance with the instrument’s features.

3.4 - ELECTRICAL WIRING DIAGRAM

TLK 38

INPUT

SUPPLY

0...1 V

ACTIVE

0/4..20 m A

0..50/60 mV

0/1..5 V

0/2..10 V

AC TIVE

PASSIVE

(2 wires)

4..20 m A

OUT 10 V DC

M ax 20 mA

gen.

e xt.

R ELAY

SSR

SSR : 8 m A / 8 VD C

RELAYS: 8A-AC1 (3A-AC3) 250 VAC

OUT 1

PTC

N TC

Pt100

OU T 2

4 - FUNCTIONS

4.1 - MEASURING AND VISUALIZATION

All the parameters referring measurements are contained in the
group

“

]

InP”.

Depending on the model required the input accept:

: Thermocouples temperature probes (J,K,S and TECNOLOGIC

IRS Infrared sensors), mV signals (0..50/60 mV, 12..60 mV),
Thermoresistances PT100.

: Thermocouples temperature probes (J,K,S and TECNOLOGIC

IRS Infrared sensors), mV signals (0..50/60 mV, 12..60 mV),
Thermistors PTC and NTC.

: normalized analogue signals 0/4..20 mA

: normalized analogue signals 0..1 V, 0/1..5 V, 0/2..10 V

Depending on the model, using par.

“SEnS”,

it’s possible to select

the type of input probe, which can be :
- for thermocouples J (J), K (CrAL), S (S) or for infrared sensors

serie TECNOLOGIC IRTC1 with linearization J (Ir.J) or K (Ir.CA)
- for thermoresistances Pt100 IEC (Pt1) or thermistors PTC

KTY81-121 (Ptc) or NTC 103AT-2 (ntc)

- for normalised signals in current 0..20 mA (0.20) or 4..20 mA
(4.20)

- for normalised signals in tension 0..1 V (0.1), 0..5 V (0.5), 1..5 V
(1.5), 0..10 V (0.10) or 2..10 V (2.10).

- for normalised signals in tension 0..50 mV (0.50), 0..60 mV (0.60),
12..60 mV (12.60).

We recommend to switch on and off the instrument when these
parameters are modified, in order to obtain a correct measuring.

For the instruments with input for temperature probes (tc, rtd) it’s
possible to select, through par.

“Unit”,

the unit of measurement

(°C, °F) and, through par.

“dP”

(Pt100, PTC and NTC only)

the

desired resolution (0=1°; 1=0,1°).

Instead, with regards to the instruments with normalised analogue
input signals, it is first necessary to program the desired resolution
on par.

“dP”

(0=1; 1=0,1; 2=0,01; 3=0,001) and then, on par.

"SSC"

, the value that the instrument must visualise at the

beginning of the scale (0/4 mA, 0/12 mV, 0/1 V o 0/2 V) and, on
par.

"FSC",

the value that the instrument must visualise at the end

of the scale (20 mA, 50 mV, 60 mV, 5 V or 10 V).

The instrument allows for measuring calibration, which may be
used to recalibrate the instrument according to application needs,
by using par.

“OFSt”

and

“rot”.

Programming par. “rot”=1,000, in par. “OFSt” it is possible to set a
positive or negative offset that is simply added to the value read by

the probe before visualisation, which remains constant for all the
measurements.

If instead, it is desired that the offset set should not be constant for
all the measurements, it is possible to operate the calibration on

any two points.
In this case, in order to decide which values to program on par.

“OFSt” and “rot”, the following formulae must be applied :

“rot” = (D2-D1) / (M2-M1)

“OFSt” = D2 - (“rot” x M2)

where:

M1 =measured value 1
D1 = visualisation value when the instrument measures M1

M2 =measured value 2
D2 = visualisation value when the instrument measures M2

It then follows that the instrument will visualise :

DV = MV x “rot” + “OFSt”

where: DV = visualised value

MV= measured value

Example 1: It is desired that the instrument visualises the value
effectively measured at 20° but that, at 200°, it visualises a value

lower than 10° (190°).
Therefore : M1=20 ; D1=20 ; M2=200 ; D2=190

“rot” = (190 - 20) / (200 - 20) = 0,944
“OFSt” = 190 - (0,944 x 200) = 1,2
Example 2: It is desired that the instrument visualises 10° whilst the

value actually measured is 0°, but, at 500° it visualises a 50° higher
value (550°).

Therefore : M1=0 ; D1=10 ; M2=500 ; D2=550
“rot” = (550 - 10) / (500 - 0) = 1,08
“OFSt” = 550 - (1,08 x 500) = 10

By using par.

“FiL”

it is possible to

program time constant of the

software filter for the input value measured, in order to reduce

noise sensitivity (increasing the time of reading).
In case of measurement error, the instrument supplies the power
as programmed on par.

“OPE”.

This power will be calculated according to cycle time programmed
for the PID controller, while for the ON/OFF controllers the cycle

time is automatically considered to be equal to 20 sec. (e.g. In the
event of probe error with ON/OFF control and “OPE”=50, the

control output will be activated for 10 sec., then it will be
deactivated for 10 sec. and so on until the measurement error

remains.).
By using par.

“InE”

it is also possible to decide the conditions of

the input error, allowing the instrument to give the power

programmed on par. “OPE” as output.
The possibilities of par. “InE” are :

= Or : the condition occurs in case of over-range or probe breakage
= Ur : the condition occurs in case of under-range or probe

breakage

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= OUr : the condition occurs in case of over-range or under-range
or probe breakage
Using par.

“diSP”,

located in the group

“

]

PAn”,

it is possible to set

normal visualization of the display which can be the process
variable (dEF), the control power (Pou), the active Set Point (SP.F)

the Set Point operating when there are active ramps (SP.o) or
alarm threshold AL1 or AL2 (AL1, AL2).
Again in the group

“

]

PAn”

the par.

“AdE”

is present that defines

the 3 led shift index functioning.

The lighting up of the green led = indicates that the process value
is within the range [SP+AdE ... SP-AdE], the lighting up of the led –

indicates that the process value is lower than [SP-AdE] and the
lighting up of the led + indicates that the process value is higher

than [SP+AdE].

4.2 - OUTPUTS CONFIGURATION

The instrument’s outputs can be programmed by entering the group
of parameters

“

]

Out

, where the relative parameters

“O1F”

and

“O2F”

(depending on the number of outputs available on the

instrument) are located.
The outputs can be set for the following functions :
- Main control output (1.rEG)

- Secondary control output (2.rEG)
- Alarm output normally open (ALno)

- Alarm output normally closed (ALnc)
- Alarm output normally closed with led reverse indication (ALni)

- Output deactivated (OFF)
The coupling outputs number outputs – number alarms can be
made in the group referring to the alarm to the alarm (“

]

AL1”,

“

]

AL2”).

4.3 - ON/OFF CONTROL (1.rEG)

All the parameters referring to the ON/OFF control are contained in
the group

“

]

rEG”.

This type of control can be obtained by programming par.

"Cont"

On.FS or = On.FA and works on the output programmed as 1.rEG,
depending on the measure, on the active Set Point

“SP”

, on the

functioning mode

"Func”

and on the hysteresis

"HSEt

The instrument carries out an ON/OFF control with symmetric

hysteresis if “Cont" = On.FS or with asymmetrical hysteresis if
“Cont” = On.FA.

O UT

off

HEAt - On.FA

OUT

time

HSEt

time

CooL - On.FA

off

CooL - On.FS

HEAt - On.FS

O UT

off

HSEt

time

OUT

off

time

HSEt

1.rEG

The control works in the following way : in the case of reverse

action, or heating (“FunC”=HEAt), it deactivates the output, when
the process value reaches [SP + HSEt] in case of symmetrical

hysteresis, or [SP] in case of asymmetrical hysteresis and is then
activated again when the process value goes below value [SP -

HSEt].
Vice versa, in case of direct action or cooling ("Func”=CooL), it

deactivates the output, when the process value reaches [SP -
HSEt] in case of symmetrical hysteresis, or [SP] in case of

asymmetrical hysteresis and is activated again when the process
value goes above value [SP + HSEt].

4.4 - NEUTRAL ZONE ON/OFF CONTROL (1.rEG - 2.rEG)

All the parameters referring to Neutral Zone ON/OFF control are
contained in the group

“

]

rEG”.

This type of control can be obtained when 2 outputs are
programmed respectively as 1.rEG and 2.rEG and the par.

“Cont”

= nr .

The Neutral Zone control is used to control plants in which there is
an element which causes a positive increase (ex. Heater,

humidifier, etc.) and an element which causes a negative increase
(ex. Cooler, de-humidifier, etc).

The control functions works on the programmed outputs depending
on the measurement, on the active Set Point

“SP”

and on the

hysteresis

"HSEt

The control works in the following way : it deactivates the outputs

when the process value reaches the Set Point and it activates the
output 1.rEG when the process value goes below value [SP -

HSEt], or it activates the output 2.rEG when the process value goes
above [SP + HSEt].

Consequently, the element causing a positive increase has to be
connected to the output programmed as 1.rEG while the element

causing a negative increase has to be connected to the output
programmed as 2.rEG.

OUT 2.rEG

(cooling)

OUT 1.rEG

(heating)

off

time

HSEt
HSEt

If 2.rEG output is used to control compressor is possible to use the
“Compressor Protection” function that has the meaning to avoid

compressor “short cycles”.
This function allows a control by time on the output 2.rEG

activation, independently by the temperature control request.
The protection is a “delayed after deactivation” type.

This protection permits to avoid the output activation for a time
programmable on par. “

CPdt

” (expressed in sec.); the output

activation will occurs only after the elapsing of time “CPdt”.

The time programmed on parameter “CPdt” is counted starting from
the last output deactivation.

Obviously, whether during the time delay caused by the
compressor protection function, the regulator request should stop,

the output activation foreseen after time “CPdt” would be erased.
The function is not active programming “CPdt” =OFF.

The led relative to 2.rEG output blinks during the phases of output
activation delay, caused by “Compressor Protection” function.

4.5 - SINGLE ACTION PID CONTROL (1.rEG)

All the parameters referring to PID control are contained in the
group

“

]

rEG”.

The Single Action PID control can be obtained by programming
par.

"Cont"

= Pid and works on the output 1.rEG depending on the

active Set Point

“SP”

, on the functioning mode

"Func”

and on the

instrument’s PID algorithm with two degree of freedom.

0 N

t c r 1

1 .r E G

( H E a t )

S P

P V

t c r 1

o f f

t c r 1

0 N

o f f

o ff

0 N

o f f

o ff

0 N

t c r 1

o f f

0 N

ti m e

O U T

In order to obtain good stability of the process variable, in the event

of fast processes, the cycle time “tcr1” has to have a low value with
a very frequent intervention of the control output.

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- OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 5

In this case use of a solid state relay (SSR) is recommended for
driving the actuator.

The Single Action PID control algorithm foresees the setting of the
following parameters :

"Pb"

– Proportional Band

"tcr1"

– Cycle time of the output 1.rEG

"Int"

– Integral Time

"rS"

– Manual Reset (if “Int =0 only)

"dEr"

– Derivative Time

“FuOC” -

Fuzzy Overshoot Control

This last parameter allows the variable overshoots at the start up of
the process or at the changing of the Set Point to be avoided.

Please remember that a low value on this parameter reduces the
overshoot while a high value increase it.

2
1

S P

P V

t i m e

1: Value “FuOC” OK

2: Value “FuOC” too high
3: Value “FuOC” too low

4.6 - DOUBLE ACTION PID CONTROL (1.rEG - 2.rEG)

All the parameters referring to PID control are contained in the
group

“

]

rEG”.

The Double Action PID control is used to control plants where there
is an element which causes a positive increase (ex. Heating) and

an element which causes a negative increase (ex. Cooling).
This type of control can be obtained when 2 outputs are
programmed respectively as 1.rEG and 2.rEG and the par.

“Cont”

= Pid.
The element causing a positive increase has to be connected to the

output programmed as 1.rEG while the element causing a negative
increase has to be connected to the output programmed as 2.rEG.

The Double Action PID control works on the outputs 1.rEG and
2.rEG depending on the active Set Point

“SP”

and on the

instrument’s PID algorithm with two degrees of freedom.

In order to obtain good stability of the process variable, in case of
fast processes, the cycle times “tcr1” and “tcr2” have to have a low

value with a very frequent intervention of the control outputs.
In this case use of solid state relays (SSR) to drive the actuators is

recommended.
The Double Action PID control algorithm needs the programming of

the following parameters :

"Pb"

- Proportional Band

"tcr1"

- Cycle time of the output 1.rEG

“tcr 2”

- Cycle time of the output 2.rEG

"Int"

- Integral Time

"rS"

- Manual Reset (if “Int =0 only)

"dEr"

- Derivative Time

“FuOC” -

Fuzzy Overshoot Control

"Prat"

- Power Ratio or relation between power of the element

controlled by output 2.rEG and power of the element controlled by

output 1.rEG.
If par. “Prat” = 0, the output 2.rEG is disabled and the control

behaves exactly as a single action PID controller, through output
1.rEG.

4.7 - AUTOTUNING

AND SELFTUNING FUNCTIONS

All the parameters referring to the AUTO-TUNING and
SELF-TUNING functions are contained in the group

“

]

rEG”.

The AUTO-TUNING and SELF-TUNING functions permit the
automatic tuning of the PID controller.
The

AUTO-TUNING

function permits the calculation of thePID

parameters by means of a FAST type tuning cycle and, at the end
of this operation, the parameters are stored into the instrument’s

memory and remain constant during control.

The

SELF-TUNING

function (rule based "TUNE-IN") instead allows

control monitoring and the continuous calculation of the parameters
during control.

Both functions automatically calculate the following parameters :

"Pb"

- Proportional Band

"tcr1"

- Cycle time of the output 1rEG

"Int"

- Integral Time

"dEr"

- Derivative Time

“FuOC” -

Fuzzy Overshoot Control

and, for the Double Action PID control, also :

“tcr 2”

- Cycle time of the output 2rEG

"Prat"

- Power Ratio P 2.rEG/ P 1.rEG

To activate the AUTO-TUNING function proceed as follows :

1) Program and activate the desired Set Point.
2) Program par. "Cont" =Pid.

3) Program par. "Func" according to the process to be controlled
through output 1rEG.

4) Program an output as 2.rEG if the instrument controls a plant
with double action
5) Program par.

"Auto"

as:

- "1” – if auto-tuning is desired automatically, each time the
instrument is switched on, on the condition that the process value is

lower (with “Func” =HEAt) than [SP- |SP/2|] or higher (with “Func”
=CooL) than [SP+ |SP/2|].

- "2" – if auto-tuning is desired automatically, the next time the
instrument is switched on, on the condition that the process value is

lower (with “Func” =HEAt) than [SP- |SP/2|] or higher (with “Func”
=CooL) than [SP+ |SP/2|], and once the tuning is finished, the par.

“Auto” is automatically swapped to the OFF state
- "3" - if manual auto-tuning is desired, by selecting par. “tunE” in

the main menu or by correctly programming key “U” as “USrb” =
tunE. The Autotuning will start at the condition that the process

value is lower (with “Func” =HEAt) than [SP- |SP/5|] or higher (with
“Func” =CooL) than [SP+ |SP/5|].

- "4" - if it’s desired to activate the autotuning automatically to
every change of Set Point, or at the end of programmed Soft-Start

cycle. The Autotuning will start at the condition that the process
value is lower (with “Func” =HEAt) than [SP- |SP/5|] or higher (with

“Func” =CooL) than [SP+ |SP/5|].
6) Exit from the parameter programming.

7) Connect the instrument to the controlled plant.
8) Activate the Auto-tuning by switch off and turn on the instrument
if “Auto”=1 or 2 , or by selecting par.

“tunE”

in the main menu (or

by correctly programming key “U” ).
At this point the Auto-tuning function is activated and is indicated by

the flashing led AT/ST.
The regulator carries out several operations on the connected plant

in order to calculate the most suitable PID parameters.
If, at the Auto-tuning start, the condition for the lower or higher
process value is not found the display will show

“ErAt”

and the

instrument will be swapped to normal control conditions according
to the previously programmed parameters.

To make the error “ErAt” disappear, press key P.
The Auto-tuning cycle duration has been limited to 12 hours

maximum.
If Auto-tuning is not completed within 12 hours, the instrument will
show

"noAt"

on the display

In case of probe error, the instrument automatically stops the cycle
in progress.

The values calculated by Auto-tuning are automatically stored in
the instrument’s memory at the end of the correct PID parameters

tuning.

Note :

The instrument is already programmed in our factory to carry

out auto-tuning at first instrument switch on ("Auto" = 2).

To activate the SELF-TUNING function proceed as follows

1) Program and activate the desired Set Point.
2) Program par. "Cont" =Pid.

3) Program par. "Func" according to the process to be controlled
through output 1.rEG.

4) Program an output as 2.rEG if the instrument controls a
dual-action plant

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- OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 6

5) Program par.

"SELF"

= yES

6) Exit from the parameter programming.
7) Connect the instrument to the controlled plant.
8) Activate Self-tuning selecting par.

“tunE”

in the main menu (or

by correctly programming key “U”).
When the Self-tuning function is active, the led AT/ST is

permanently lit up and all the PID parameters ("Pb", "Int", "dEr",
etc.) are no longer visualized.

Note :

It’s always preferable tuning the instrument using the

Autotuning and to activate the Selftuning after because the tuning
through Selftuning is more slow.

To stop the Auto-tuning cycle or deactivate the Self-tuning function

select one of the control types : "rEG", "OPLO" or "OFF" from the
menu “SEL”. If the instrument is switched off during Auto-tuning or

with the Self-tuning function activated, these functions will remain
activated the next time it is switched on.

4.8 - REACHING OF THE SET POINT AT CONTROLLED SPEED
AND AUTOMATIC SWITCHING BETWEEN TWO SET POINTS
(RAMPS AND DWELL TIME)

All the parameters referring to the ramps functioning are contained
in the group

“

]

rEG”.

It is possible to reach the set point in a predetermined time (in any
case longer than the time the plant would naturally need). This

could be useful in those processes (heating or chemical
treatments, etc.) where the set point has to be reached gradually, in

a predetermined time.
Once the instrument has reached the first Set Point (SP1) it is

possible to have automatic switching to the second Set Point (SP2)
after a set time, thus obtaining a simple automatic process cycle.

These functions are available for all the programmable controls
(PID single and double action, ON/OFF and Neutral Zone

ON/OFF).
The function is determined by the following parameters :

"SLor"

- Gradient of first ramp expressed in unit/minute

"SLoF"

- Gradient of second ramp expressed in unit/minute.

"dur.t"

- Dwell time of Set Point “SP1” before automatic switching

to Set Point “SP2” (expressed in hrs. and min.).
The functions are deactivated when the relative parameters are =

InF.
If is desired only one ramp (ex. to reach “SP1”) it is enough to

program on the par. "SLor" the desired value.
The ramp "SLor" it will always active at power on and when the

Active Set Point value is changed.

S P 1

[ U n it ]

P V

S P 1 V a lu e

c h a n g e

S P 1

t im e [ m in . ]

S L o r

If it is desired an automatic cycle from the power on instead it is
necessary to program the par. "nSP" = 2, to program the two Set

Point values "SP1" and "SP2" and naturally to program the par.
"SLor", "dur.t" and "SLoF" with the desired values.

In this case at the end of the cycle all the ramps won't be more
active.

[ U n it ]

S P 1

P V

A U T O

c h a n g e

S e t

d u r . t

S P 2

t im e [ m in . ]

S L o r

S L o F

Examples with starts from values lower than SP and with
decreasing of SP.

Note:

In case of PID control, if Auto-tuning is desired whilst the

ramp function is active, this will not be carried out until the tuning

cycle has been completed. It is therefore recommended that
Auto-tuning be started avoiding activating the ramp function and,
once the tuning is finished, deactivate Auto-tuning (“Auto” = OFF),
program the desired ramp and, if it automatic tuning is desired,
enable the Self-tuning function.

4.9 - SOFT-START FUNCTION

All the parameters referring to the Soft -Start functioning are
contained in the group

“

]

rEG”.

The Soft-Start function only works through PID control and allows
the limitation of control power when the instrument is switched on,

for a programmable period of time.
This is useful when the actuator, driven by the instrument, may be

damaged excess power supplied when the application is not yet in
the normal rating. (ex. for certain heating elements).

The function depends on the following parameters :

“St.P”

- Soft-Start power

“SSt”

- Soft-Start time (expressed in hh.mm)

“HSEt”

- End Soft Start cycle threshold

If both parameters are programmed with values other than OFF,

when switched on the instrument gives an output power as
programmed on par. “St.P” for the time programmed on par. “SSt”

or when is reached the absolute value programmed at par. “HSEt”.
Practically, the instrument works in manual condition and switches

to automatic control at the elapsing of time “SSt” or when is
reached the absolute value programmed at par. “HSEt”.

To disable the Soft-Start function simply program par. “SSt” = OFF.
Whenever, a measurement errors occurs during the Soft-Start

execution, the function is interrupted and the instrument gives an
output power as programmed on par. “OPE”.

If the measurement is restored, the Soft-Start is still deactivated.
If it’s desired to activate the Autotuning with Soft-Start set par.

“Auto”=4.
The Autotuning will start automatically at the end of programmed

Soft-Start cycle at the condition that the process value is lower (with
“Func” =HEAt) than [SP- |SP/5|] or higher (with “Func” =CooL) than

[SP+ |SP/5|].

4.10 - ALARMS OUTPUTS FUNCTIONS (AL1, AL2)

The alarms (AL1, AL2) are depending on the process value and

before to set his functioning it’s necessary to establish to which
output the alarm has to correspond to.

First of all it’s necessary to configure, in the parameters group

“

]

Out”,

the parameters relative to the outputs required as alarm

(“O1F” , “O2F”) programming the parameter relative to the desired

output as follows :

= ALno

if the alarm output has to be ON when the alarm is active,

while it’s OFF when the alarm is not active

= ALnc

if the alarm output has to be ON when the alarm is not

active, while it’s OFF when the alarm is active

= ALni

if the alarm output has to be ON when the alarm is not

active, while it is OFF when the alarm is active but with reverse led

indication (led ON= alarm OFF).

Note:

In all the examples that follow is made reference to the alarm

AL1. Naturally the operation of the other alarms results analogous.

Have now access at the group

“

]

AL1”,

and program on par.

“OAL1”

, to which output the alarm signal has to be sent.

The alarm functioning is instead defined by parameters :

"AL1t "

- ALARM TYPE

"Ab1"

- ALARM CONFIGURATION

“AL1”

- ALARM THRESHOLD

“AL1L”

- LOW ALARM THRESHOLD (for band alarm) OR

MINIMUM SET OF AL1 ALARM THRESHOLD (for low or high

alarm)

“AL1H”

- HIGH ALARM THRESHOLD (for band alarm) OR

MAXIMUM SET OF AL1 ALARM THRESHOLD (for low or high

alarm)

“HAL1” -

ALARM HYSTERESIS

“AL1d”

- ALARM ACTIVATION DELAY (in sec.)

"AL1i"

- ALARM BEHAVIOUR IN THE EVENT OF

MEASUREMENT ERROR

TECNOLOGIC spa - TLK 38

- OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 7

"AL1t" – ALARM TYPE :

the alarm output can behave in six

different ways.

LoAb

= ABSOLUTE LOW ALARM: The alarm is activated when the

process value goes below the alarm threshold set on parameter

"AL1” and will be deactivated when it goes above the value
[AL1+HAL1].

With this mode is possible to program the minimum and the
maximum set of “AL1” by “AL1L” and “AL1H” parameters.

HiAb

= ABSOLUTE HIGH ALARM: The alarm is activated when the

process value goes higher than the alarm threshold set on
parameter "AL1" and will be deactivated when it goes below the

value [AL1 - HAL1].
With this mode is possible to program the minimum and the

maximum set of “AL1” by “AL1L” and “AL1H” parameters.

LoAb

off

AL1

HiAb

HAL1

time

off

AL1

time

HAL1

off

OUT

off

OUT

AL1

LodE

= DEVIATION LOW ALARM: The alarm is activated when the

process value goes below the value [SP + AL1] and will be

deactivated when it goes above the value [SP + AL1 + HAL1].
With this mode is possible to program the minimum and the

maximum set of “AL1” by “AL1L” and “AL1H” parameters.

HidE

= DEVIATION HIGH ALARM: The alarm is activated when the

process value goes above the value [SP + AL1] and will be

deactivated when it goes below the value [SP + AL1 - HAL1].
With this mode is possible to program the minimum and the

maximum set of “AL1” by “AL1L” and “AL1H” parameters.

LodE

off

-AL1

HAL1

time

off

AL1

HidE

time

HAL1

off

OUT

AL1

OUT

AL1

LHAb

= ABSOLUTE BAND ALARM: The alarm is activated when

the process value goes under the alarm threshold set on parameter
"AL1L" or goes higher than the alarm threshold set on parameter

"AL1H" and will be deactivated when it goes below the value [AL1H
- HAL1] or when it goes above the value [AL1L + HAL1].

LHdE

= DEVIATION BAND ALARM: The alarm is activated when

the process value goes below the value [SP + AL1L] or goes above
than the value [SP + AL1H] and will be deactivated when it goes

below the value [SP + AL1H - HAL1] or when it goes above the
value [SP + AL1L + HAL1].

LHAb

off

AL1H

AL1L

time

off

HAL1

- AL1L

AL1H

time

LHdE

HAL1

off

OUT

AL1

OUT

AL1

Ab1" - ALARM CONFIGURATION:

This parameter can assume a

value between 0 and 31.

The number to be set, which will correspond to the function desired,
is obtained by adding the values reported in the following

descriptions :
ALARM BEHAVIOUR AT SWITCH ON: the alarm output may

behave in two different ways, depending on the value added to par.
“Ab1”.

+0 = NORMAL BEHAVIOUR: The alarm is always activated when
there are alarm conditions.

+1 = ALARM NOT ACTIVATED AT SWITCH ON: If, when switched
on, the instrument is in alarm condition, the alarm is not activated. It

will be activated only when the process value is in non-alarm
conditions and then back in alarm conditions.

P V

+ 1

+ 0

t i m e

A L 1

O N

o f f

A b 1

exemple with absolute low alarm

ALARM DELAY: the alarm output may behave in two different

ways depending on the value added to par. “Ab1”.
+0 = ALARM NOT DELAYED: The alarm is immediately activated

when the alarm condition occurs.
+2 = ALARM DELAYED: When the alarm condition occurs, delay

counting begins, as programmed on par. “AL1d” (expressed in
sec.) and the alarm will be activated only after the elapsing of that

time.
ALARM LATCH: : the alarm output may behave in two different

ways depending on the value added to par. “Ab1”.
+ 0 = ALARM NOT LATCHED: The alarm remains active in alarm

conditions only.
+ 4 = ALARM LATCHED: The alarm is active in alarm conditions

and remains active even when these conditions no longer exist,
until the correctly programmed key “U”, (“USrb”=Aac) has been

pushed.

A L 1

P V

O N

t i m e

+ 0

A b 1

+ 4

o f f

exemple with absolute high alarm

ALARM AKNOWLEDGEMENT: : the alarm output may behave in
two different ways depending on the value added to par. “Ab1”.

+ 0 = ALARM NOT AKNOWLEDGED: The alarm always remains
active in alarm conditions.

+ 8 = ALARM AKNOWLEDGED: The alarm is active in alarm
conditions and can be deactivated by key “U” if properly

programmed (“USrb”=ASi), and also if alarm conditions still exist.
ALARM BEHAVIOUR AT SET POINT CHANGE (DEVIATION

ALARMS ONLY): the alarm output may behave in two different
ways, depending on the value added to par. “Ab1”.

+0 = NORMAL BEHAVIOUR: The alarm is always activated when
there are alarm conditions.

+16 = ALARM NOT ACTIVATED AT SET POINT CHANGE: If,
when Set Point change, the instrument is in alarm condition, the

alarm is not activated. It will be activated only when the process
value is in non-alarm conditions and then back in alarm conditions.

"AL1i" - ALARM ACTIVATION IN CASE OF MEASUREMENT
ERROR:

This allows one to establish how the alarm have behave

in the event of a measurement error (yES=alarm active; no=alarm
deactivated).

TECNOLOGIC spa - TLK 38

- OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 8

4.11 - LOOP BREAK ALARM FUNCTION

All the parameters referring to the Loop Break alarm function are
contained in the group

“

]

LbA”.

The Loop Break alarm is available on all the instruments, which

intervenes when, for any reason (short-circuit of a thermocouple,
thermocouple inversion, load interruption), the loop control is

interrupted.
First of all, it is necessary to establish to which output the alarm has

to correspond.
To do this it is necessary to set the parameter relative to the output
to be used

(“O1F” , “O2F”) in the group

“

]

Out”,

programming the

parameter as :

= ALno

if the alarm output has to be ON when the alarm is active

while it is OFF when the alarm is not active.

= ALnc

if the alarm output has to be ON when the alarm is not

active while it is OFF when the alarm is active.

= ALni

if the alarm output has to be ON when the alarm is not

active, while it is OFF when the alarm is active but with reverse led

indication (led ON= alarm OFF).
Enter group

“

]

LbA”

and program which output the alarm signal

has to be addressed to on par.

“OLbA”

The Loop Break alarm is activated if the output power remains at
the 100% of the value for the time programmed on par.

"LbAt"

(expressed in sec.).
To avoid false alarms, the value of this parameter has to be set

considering the time the plant takes to reach the Set point when the
measured value is a long distance from it (for example at the plant

start-up).
On alarm intervention, the instrument visualizes the message

“LbA”

and behaves as in the case of a measurement error giving a

power output as programmed on par.

“OPE”

(programmable in the

group

“

]

InP”)

To restore normal functioning after the alarm, select the control
mode “OFF” and then re-program the automatic control (“rEG”)

after checking the correct functioning of probe and actuator.
To exclude the Loop Break alarm, set “OLbA” = OFF.

4.12 - FUNCTIONING OF KEY “U”

The function of key “U” can be set through par.

“USrb”

contained

in the group “

“

]

PAn”.

The parameter can be programmed as :

= noF

: no function

= tunE

: Pushing the key for 1 sec. at least, it is possible to

activate/deactivate Auto-tuning or Self-tuning

= OPLO

: Pushing the key for 1 sec. at least, it is possible to swap

from automatic control (rEG) to manual one (OPLO) and vice versa.

= Aac

: Pushing the key for 1 sec. at least, it is possible to

acknowledge the alarm. (see par. 4.10)

= ASi

: Pushing the key for 1 sec. at least, it is possible to

acknowledge an active alarm (see par. 4.10)

= CHSP

: Pushing the key for 1 sec. at least, it is possible to select

one of the 4 pre-programmed Set Points on rotation.

= OFF

: Pushing the key for 1 sec. at least, it is possible to swap

from automatic control (rEG) to OFF control (OFF) and vice versa.

4.13 - PARAMETERS CONFIGURATION BY “KEY01”

The instrument is equipped with a connector that allows the transfer
from and toward the instrument of the functioning parameters
through the device

TECNOLOGIC KEY01

with

5 poles

connector.

This device it’s 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 device KEY01 it’s necessary that the device or
instrument are being supplied.

To transfer the configuration of an instrument into the device

(UPLOAD)

it is necessary to proceed in the following way:

1) position both dip switch of KEY 01 in the

OFF

mode.

2) connect the device to the instrument TLK plugging the special

connector.
3) verify that the instrument or the device are supplied

4) observe the indication led on the device KEY 01: if it results
green this means that a configuration is already loaded on the

device while if it results green blinking or red blinking this means
that it has not been loaded any valid configuration on the device .

5) press the button placed on the device.
6) observe the indication led : after having pressed the button, the

led becomes red and therefore, at the end of the data transfer, it
becomes green.

7) now it is possible to disconnect the device.
To transfer the configuration loaded on the device onto an
instrument of the same family

(DOWNLOAD)

, it is necessary to

proceed in the following way:
1) position both dip switch of KEY 01 in the

mode.

2) connect the device to an instrument TLK having the same

features of the one from which has been downloaded the desired
configuration, plugging the special connector.

3) verify that the instrument or the device are supplied
4) observe the indication led on the device KEY 01: it has to result

green, because if the led results green blinking or red blinking, this
means that on the device it has not been downloaded any valid

configuration and therefore it’s useless to continue.
5) if the les results green, press the button placed on the device.

6) observe the indication led : after having pressed the button, the
led becomes red and therefore, at the end of the data transfer, it

becomes green.
7) now it is possible to disconnect the device.

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.

5 - PROGRAMMABLE PARAMETERS

Here following are described all the parameters available on the
instrument. Some of them could be not present or because they are

depending on the type of instrument or because they are
automatically disabled as unnecessary.

Group “

]

SP”

(parameters relative to the Set Point)

9999

SPLL ÷ 9999

High Set Point

SPHL

-1999

-1999 ÷ SPHL

Low Set Point

SPLL

SPLL ÷ SPHL

Set Point 4

SP4

SPLL ÷ SPHL

Set Point 3

SP3

SPLL ÷ SPHL

Set Point 2

SP2

SPLL ÷ SPHL

Set Point 1

SP1

1 ÷ nSP

Active Set point

SPAt

1 ÷ 4

Number of the
programmable Set

point

nSP

Note

Def.

Range

Description

Par.

TECNOLOGIC spa - TLK 38

- OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 9

Group “

]

InP”

(parameters relative to the measure input)

-100 ÷ 100

Output power in case of
measuring error

OPE

OUr

OUr / Or / Ur

“OPE” functioning in
case of measuring error

OUr = Over and
under-range

Or = Over-range only
Ur = Under-range only

InE

1.000

0.000 ÷ 2.000

Rotation of the
measuring straight line

rot

-1999 ÷ 9999

Measuring Offset

OFSt

1.0

0FF÷ 20.0

sec.

Input digital filter

FiL

°C

°C / °F

Temperature unit of

measurement

Unit

Pt1 / Ptc / ntc:

0 / 1

norm sig.:

0 ÷ 3

Number of decimal

figures

100

SSC ÷ 9999

High scale limit input

with V / I signals

FSC

-1999 ÷ FSC

Low scale limit input

with V / I signals

SSC

Ptc

4.20

0.10

input C :

J / CrAL / S /

Ir.J / Ir.CA /

Pt1 / 0.50 /

0.60 / 12.60

input E :

J / CrAL / S /

Ir.J / Ir.CA /

Ptc / ntc /

0.50 / 0.60 /

12.60

input I :

0.20 / 4.20

input V :

0.1 /

0.5 / 1.5 /

0.10 / 2.10

Probe type:

J= thermocoupled J
CrAL= termocoupled K

S= thermocoupled S
Ir.J=Infrared Sen. IRS J

Ir.CA= Infrared Sen.
IRS K

Pt1= thermores. Pt100
0.50= 0..50 mV

0.60= 0..60 mV
12.60= 12..60 mV

Ptc= thermistor PTC
KTY81-121

ntc= thermistor NTC
103-AT2

0.20= 0..20 mA
4.20= 4..20 mA

0.1= 0..1 V
0.5=0..5 V

1.5= 1..5 V
0.10= 0..10 V

2.10= 2..10 V

SEnS

Note

Def.

Range

Description

Par.

Group“

]

Out”

(parameters relative to the outputs)

ALno

1.rEG / 2.rEG

ALno / ALnc

ALni / OFF

Functioning of output 2:

see “O1F”

O2F

1.rEG

1.rEG / 2.rEG

ALno / ALnc

ALni / OFF

Functioning of output 1:

1.rEG= Control output 1
2.rEG= Control output 2

ALno= Alarm Out
normally opened

ALnc= Alarm Out
normally closed

ALni= Alarm Out
normally closed with

reverse led func.

O1F

Note

Def.

Range

Description

Par.

Group “

]

AL1”

(parameters relative to alarm AL1)

LoAb

LoAb / HiAb

LHAb / LodE

HidE / LHdE

Alarm AL1 type:

LoAb= Absolute Low
HiAb= Absolute High

LHAb= Absolute Band
LodE= Deviation Low

HidE= Deviation High
LHdE= Deviation Band

AL1t

Out2

Out1 / Out2 /

OFF

Output where alarm
AL1 is addressed

OAL1

Note

Def.

Range

Description

Par.

no / yES

Alarm AL1 activation in
case of measuring error

AL1i

OFF

OFF ÷ 9999

sec.

Activation delay of

alarm AL1

AL1d

OFF ÷ 9999

Alarm AL1 hysteresis

HAL1

9999

AL1L ÷ 9999

High threshold band

alarm AL1 or Maximum
set alarm AL1 for high

or low alarm

AL1H

-1999

-1999 ÷ AL1H

Low threshold band

alarm AL1 or Minimum
set alarm AL1 for high

or low alarm

AL1L

AL1L÷ AL1H

Alarm AL1 threshold

AL1

0 ÷ 31

Alarm AL1 functioning:

+1 = not activated at
power on

+2 = delayed
+4 = latch

+8 = aknowledged
+16 = not activated at

Set change (Dev. Al.)

Ab1

Group “

]

AL2”

(parameters relative to alarm AL2)

no / yES

Alarm AL2 activation in
case of measuring error

AL2i

OFF

OFF ÷ 9999

sec.

Activation delay of
alarm AL2

AL2d

OFF ÷ 9999

Alarm AL2 hysteresis

HAL2

9999

AL2L ÷ 9999

High threshold band
alarm AL2 or Maximum

set alarm AL2 for high
or low alarm

AL2H

-1999

-1999 ÷ AL2H

Low threshold band
alarm AL2 or Minimum

set alarm AL2 for high
or low alarm

AL2L

AL2L÷ AL2H

Alarm AL2 threshold

AL2

0 ÷ 31

Alarm AL2 functioning:

see “Ab1”

Ab2

LoAb

LoAb / HiAb

LHAb / LodE

HidE / LHdE

Alarm AL2 type:
see “AL1t”

AL2t

OFF

Out1 / Out2 /

OFF

Output where alarm
AL2 is addressed

OAL2

Note

Def.

Range

Description

Par.

Group “

]

LbA”

(parameters relative to Loop Break Alarm)

OFF

OFF ÷ 9999

sec.

Time necessary to

activate alarm LbA

LbAt

OFF

Out1 / Out2 /

OFF

Output where alarm

LbA is addressed

OLbA

Note

Def.

Range

Description

Par.

Group “

]

rEG”

(parameters relative to the control)

OFF

OFF÷ 9999

sec.

Compressor Protection

time for 2.rEG

CPdt

0 ÷ 9999

Hysteresis of ON/OFF
control (or end Soft

Start cycle threshold)

HSEt

HEAt

HEAt / CooL

Functioning mode
output 1.rEG

Func

Pid

Pid / On.FA

On.FS / nr

Control type:
Pid= PID

On.FA= ON/OFF asym.
On.FS= ON/OFF sym.

nr= Neutral Zone
ON/OFF

Cont

Note

Def.

Range

Description

Par.

TECNOLOGIC spa - TLK 38

- OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 10

OFF

OFF/0.1÷7.59

/ InF hrs.-min.

Soft-Start time

SSt

-100 ÷ 100 %

Soft-Start power

St.P

InF

0.00 ÷ 99.99

/ InF

unit / min.

Gradient of second
ramp:

InF= Ramp not active

SLoF

InF

0.00 ÷ 99.59

/ InF

hrs.-min.

Duration time between
two ramps

InF= Time not active

dur.t

InF

0.00 ÷ 99.99

/ InF unit/min.

Gradient of first ramp :
InF= Ramp not active

SLor

0.0

-100.0÷100.0

Manual reset

10.0

0.1 ÷ 130.0

sec.

Cycle time of 2.rEG

tcr2

1.00

0.01 ÷ 99.99

Power ratio 2.rEg /
1.rEG

Prat

20.0

0.1 ÷ 130.0

sec.

Cycle time of output
1.rEG

tcr1

0.5

0.00 ÷ 2.00

Fuzzy overshoot control

FuOc

OFF÷ 9999

sec.

Derivative time

dEr

200

OFF ÷ 9999

sec.

Integral time

Int

0 ÷ 9999

Proportional band

no / yES

Selftuning enable

SELF

OFF /

1 / 2 / 3 / 4

Autotuning Fast enable

OFF = Not active
1 = Start each power on

2= Start at first power
on

3= Start manually
4= Start after Soft Start

or change Set Point

Auto

Group “

]

PAn”

(parameters relative to the user interface)

SAE

SE / AE /

SAE / SAnE

Set Fast program.:

SE= Active Set can be
modified while the

alarm thresholds
cannot be modified

AE= Active Set cannot
be modified while the

alarm thresholds can
be modified

SAE= Active Set and
alarm thresholds can

be modified
SAnE= Active Set and

alarm thresholds
cannot be modified

Edit

OFF...9999

Shift value for the shift

index functioning

AdE

dEF

dEF / Pou /

SP.F / SP.o /

AL1 / AL2

Variable visualized on

the display:
dEF= Process Value

Pou= Control Power
SP.F= Active Set

SP.o = Operative Set
AL1 = AL1 threshold

AL2 = AL2 threshold

diSP

noF

noF / tunE /

OPLO / Aac /

ASi / CHSP /

OFF

Functioning of key “U” :

noF = No Function
tune= Start Autotuning

or Selftuning
OPLO= Manual Control

(open loop)
Aac= Reset Alarms

latch
ASi= Aknowledged

Alarms
OFF= Control OFF

USrb

Note

Def.

Range

Description

Par.

6 - PROBLEMS, MAINTENANCE AND GUARANTEE

6.1 - ERROR SIGNALLING

Push key “P”

Possible anomaly of
the EEPROM memory

ErEP

Check the working of
probe and actuator and

swap the instrument to
(rEG) control

Loop control
interrupted

(Loop break alarm)

LbA

Check the functioning of

probe and actuator and try
to repeat the auto-tuning.

Auto-tuning not

finished within 12
hours

noAt

Push key “P” in order to
make the error message

disappear. Once the error
has been found, try to

repeat the auto-tuning.

Auto-tuning not
possible because the

process value is too
higher or too lower

ErAt

The measured variable
is over the probe’s

limits (over-range)

oooo

The measured variable

is under the probe’s
limits (under-range)

uuuu

Verify the correct

connection between probe
and instrument and then

verify the correct
functioning of the probe

Probe interrupted

- - - -

Action

Reason

Error

In error conditions, the instrument provides an output power as
programmed on par. “OPE” and activates the desired alarms, if the
relative parameters “ALni” have been programmed = yES.

6.2 - CLEANING

We recommend cleaning of the instrument with a slightly wet cloth
using water and not abrasive cleaners or solvents which may

damage the instrument.

6.3 - GUARANTEE AND REPAIRS

The instrument is under warranty against manufacturing flaws or

faulty material, that are found within 12 months from delivery date.
The guarantee is limited to repairs or to the replacement of the

instrument. The eventual opening of the housing, the violation of
the instrument or the improper use and installation of the product

will bring about the immediate withdrawal of the warranty’s effects.
In the event of a faulty instrument, either within the period of

warranty, or further to its expiry, please contact our sales
department to obtain authorisation for sending the instrument to

our company. The faulty product must be shipped to TECNOLOGIC
with a detailed description of the faults found, without any fees or

charge for Tecnologic, except in the event of alternative
agreements.

7 - TECHNICAL DATA

7.1 - ELECTRICAL DATA

Power supply: 12 VAC/VDC, 24 VAC/VDC, 100.. 240 VAC +/- 10%

Frequency AC: 50/60 Hz
Power consumption: 4 VA approx.

Input/s: 1 input for temperature probes: tc J,K,S ; infrared sensors
TECNOLOGIC IRS J e K; RTD Pt 100 IEC; PTC KTY 81-121 (990

Ω

@ 25 °C); NTC 103AT-2 (10K

Ω

@ 25 °C) or mV signals 0...50

mV, 0...60 mV, 12 ...60 mV or normalized signals 0/4...20 mA, 0..1

V, 0/1...5 V , 0/2...10 V.
Normalized signals input impedance: 0/4..20 mA: 51

Ω

; mV and

V: 1 M

Ω

Output/s: Up to 2 outputs. Relay SPDT (8 A-AC1, 3 A-AC3 / 250

VAC) ; or in tension to drive SSR (8mA/ 8VDC).
Auxiliary supply output: 10 VDC / 20 mA Max.

Electrical life for relay outputs: 100000 operat.
Installation category: II

Measurement category: I
Protection class against electric shock: Class II for Front panel
Insulation:

Reinforced insulation between the low voltage part

(power supply 115 / 230 V and relay outputs) and front panel;
Reinforced insulation between the low voltage section (Supply 115 /

230 V and relay outputs) and the extra low voltage section (input,

TECNOLOGIC spa - TLK 38

- OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 11

SSR outputs); Reinforced between power supply and relay; No
insulation between supply 12 V and input.

No insulation between

input and SSR outputs.

7.2 - MECHANICAL DATA

Housing: Self-extinguishing plastic, UL 94 V0
Dimensions: 33 x 75 mm, depth 64 mm

Weight: 110 g approx.
Mounting: Flush in panel in 29 x 71 mm hole

Connections: 2,5 mm

screw terminals block

Degree of front panel protection : IP 65 mounted in panel with

gasket
Pollution situation: 2

Operating temperature: 0 ... 50 °C
Operating humidity: 30 ... 95 RH% without condensation

Storage temperature: -10 ... +60 °C

7.3 - MECHANICAL DIMENSIONS, PANEL CUT-OUT AND
MOUNTING [mm]

TLK 38

OUT2

OUT1

RECOMMENDED

PANEL CUTOUT

min. 15 mm

in.

TYPE 1

PANEL

ASKET

PANEL

ASKET

YPE 2

BRACKET

TYPE 1

BRACKETS

TYPE 2

7.4 - FUNCTIONAL FEATURES

Control: ON/OFF, ON/OFF Neutral Zone, PID single Action, PID

double action.
Measurement range: according to the used probe (see range table)

Display resolution: according to the probe used 1/0,1/0,01/0,001

Overall accuracy: +/- 0,5 % fs (tc S: +/- 1 % fs)
Sampling rate: 130 ms.

Display: 4 Digit Red h 12 mm
Compliance: ECC directive EMC 2004/108/CE (EN 61326), ECC
directive LV 2006/95/CE (EN 61010-1)
Approvals: C-UL (file n. E206847)

7.5 - MEASURING RANGE TABLE

2 ... 10 V

“SEnS” = 2.10

0 ... 10 V

“SEnS” = 0.10

1 ... 5 V

“SEnS” = 1.5

0 ... 5 V

“SEnS” = 0.5

0 ... 1 V

“SEnS” = 0.1

12 ... 60 mV

“SEnS” = 12.60

0 ... 60 mV

“SEnS” = 0.60

0 ... 50 mV

“SEnS” = 0.50

4..20 mA

“SEnS” = 4.20

-199.9 ... 999.9
-19.99 ... 99.99
-1.999 ... 9.999

-1999 ... 9999

0..20 mA

“SEnS” = 0.20

-50.0 ... 110.0 °C

-58.0 ... 230.0 °F

-50 ... 110 °C

-58 ... 230 °F

NTC (103-AT2)

“SEnS” = ntc

-55.0 ... 150.0 °C

-67.0 ...302.0 °F

-55 ... 150 °C

-67 ... 302 °F

PTC (KTY81-121)

“SEnS” = Ptc

-199.9 ... 850.0 °C

-199.9 ... 999.9 °F

-200 ... 850 °C

-328 ... 1562 °F

Pt100 (IEC)

“SEnS” = Pt1

- - - -

0 ... 1760 °C

32 ... 3200 °F

tc S

“SEnS” = S

- - - -

0 ... 1370 °C

32 ... 2498 °F

tc K

“SEnS” = CrAl

- - - -

0 ... 1000 °C

32 ... 1832 °F

tc J

“SEnS” = J

“dP”= 1, 2, 3

“dP” = 0

INPUT

7.6 – INSTRUMENT ORDERING CODE

TLK38 a b c d ee f

a : POWER SUPPLY
F

12 VAC/VDC

= 24 VAC/VDC

= 100... 240 VAC

b : INPUT
C

= thermocouples (J, K, S, I.R), mV, thermoresistances (Pt100)

= thermocouples (J, K, S, I.R.), mV, thermistors (PTC, NTC)

= normalized signals 0/4..20 mA

= normalized signals 0..1 V, 0/1..5 V, 0/2..10 V.

c : OUTPUT OUT1
R

= Relay

= VDC for SSR

d : OUTPUT OUT2
R

= Relay

= VDC for SSR

= None

ee: SPECIAL CODES
f: SPECIAL VERSIONS

TLK 38 PASSWORD = 381

TECNOLOGIC spa - TLK 38

- OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 12

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