Tecnologic TLK 38, TLK 48 Operating Instructions Manual

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: [e-mail]

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 CODE7.6

MEASUREMENT RANGE TABL

E7.5

FUNCTIONAL DATA7.4

MECHANICAL DIMENSIONS, PANEL CUT-OUT AND
MOUNTING

7.3

MECHANICAL DAT

A7.2

ELECTRICAL DATA7.1

TECHNICAL DATA7

GUARANTEE AND REPAIR

S6.3

CLEANING6.2

ERROR SIGNALLING6.1

PROBLEMS , MAINTENANCE AND GUARANTE

E6

PROGRAMMABLE PARAMETERS TABLE5

PARAMETERS CONFIGURATION BY KEY014.13

FUNCTION OF KEY “U”4.12

LOOP BREAK ALARM FUNCTION4.11

ALARMS OUTPUTS FUNCTIONS4.10

SOFT-START FUNCTION4.9

REACHING OF SET POINT AT CONTROLLED SPEE

D
AND AUTOMATIC COMMUTATION BETWEEN TWO
SET POINTS

4.8

AUTO-TUNING AND SELF-TUNING FUNCTIONS4.7

DOUBLE ACTION PID CONTROL4.6

SINGLE ACTION PID CONTROL4.5

NEUTRAL ZONE ON/OFF CONTRO

L4.4

ON/OFF CONTROL4.3

OUTPUTS CONFIGURATION4.2

MEASURING AND VISUALIZATION4.1

FUNCTIONS4

ELECTRICAL WIRING DIAGRAM3.4

ELECTRICAL CONNECTIONS3.3

MECHANICAL MOUNTIN

G3.2

PERMITTED USE3.1

INFORMATION ON INSTALLATION AND USE 3

ACTIVE SET POINT SELECTION2.5

CONTROL STATES2.4

PARAMETER PROGRAMMING LEVEL

S2.3

SELECTION OF CONTROL STATE AND PARAMETE

R
PROGRAMMING

2.2

FAST PROGRAMMING OF SET POINT 2.1

PROGRAMMING2

FRONT PANEL DESCRIPTION1.2

GENERAL DESCRIPTION1.1

INSTRUMENT DESCRIPTION1

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:
C: Thermocouples temperature probes (J,K,S and TECNOLOGIC
IRS Infrared sensors), mV signals (0..50/60 mV, 12..60 mV),
Thermoresistances PT100.
E : Thermocouples temperature probes (J,K,S and TECNOLOGIC
IRS Infrared sensors), mV signals (0..50/60 mV, 12..60 mV),
Thermistors PTC and NTC.

I : normalized analogue signals 0/4..20 mA
V : 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

TECNOLOGIC spa - TLK 38 - OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 1

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

1.2

-

FRONT PANEL DESCRIPTION

OUT1

TLK 38

1

7

2

3

4

8

5

9

10

11

6

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

2 .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.)

SELFTUNING

AUTOTUNING

AT
ST

2 sec.

Hold for

"OF F "

"rEG "

"OP 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 (“

]

SP “) 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.

TECNOLOGIC spa - TLK 38 - OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 2

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 f or

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 param eter has been selected, if the LED SET i s 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 “

]

SP “.

The active Set point can be selected :

- by parameter "SPAt" in the group of parameters “

]

SP “.

- 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", how ever the instrument will act according to the Set point
selected as active.

3 - INFORMATION ON INSTALLATION AND US

E

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

TECNOLOGIC spa - TLK 38 - OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 3

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

INP UT

SUPPLY

0...1 V

ACTIVE

0/4..20 mA

0..50/60 mV

0/1..5 V

ACTIVE

PASSIVE

(2 wires)

4..20 mA

4..20 mA

OUT 10 VDC

Max 20 mA

gen.

ext.

RELAY

1 23

C

SSR

SSR : 8 m A / 8 VD C

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

7

OUT 1

NC4NO

5 6 98 10

PTC

NTC

I

+

Pt100

11+12

TC

+

-

+

-

+

NONCC

+

-

OUT 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:
C: Thermocouples temperature probes (J,K,S and TECNOLOGIC
IRS Infrared sensors), mV signals (0..50/60 mV, 12..60 mV),
Thermoresistances PT100.
E : Thermocouples temperature probes (J,K,S and TECNOLOGIC
IRS Infrared sensors), mV signals (0..50/60 mV, 12..60 mV),
Thermistors PTC and NTC.

I : normalized analogue signals 0/4..20 mA
V : 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 instrum ent 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

TECNOLOGIC spa - TLK 38 - OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 4