Pixsys ATR 121 User manual

ATR 121-141
Controller / Regolatore
User manual / Manuale d’uso

Table of contents
1 Safety guide lines ................................................................................5
2 Model identification...........................................................................6
3 Technical features...............................................................................6
3.1 General features.........................................................................6
4 Hardware features..............................................................................7
4.1 Software features ......................................................................8
5 Dimensions and installation............................................................8
6 Electrical wirings .................................................................................9
6.1 Wiring diagram..........................................................................9
7 Display and keys functions.............................................................13
7.1 Numeric indicators (Display)................................................13
7.2 Meaning of status lights (Led)..............................................13
7.3 Keys..............................................................................................14
8 Controller functions..........................................................................14
8.1 Modifying main setpoint and alarm setpoint values....14
9 Tuning ..................................................................................................15
9.1 Auto-tune...................................................................................15
9.2 Manual tuning..........................................................................15
9.3 Automatic tuning ....................................................................16
9.4 Memory card (optional).........................................................16
9.5 Latch On function....................................................................17
9.6 Dual action Heating-Cooling...............................................19
10 Dead band function .........................................................................21
11 Serial communication .....................................................................22
12 Configuration.....................................................................................25
12.1 Loading default values...........................................................25
12.2 Modify configuration parameters ......................................26
13 Configuration parameters..............................................................27
14 Alarm intervention modes..............................................................36
15 Table of anomaly signals ................................................................39

Sommario
1 Norme di sicurezza ...........................................................................42
2 Identificazione del modello............................................................43
3 Dati tecnici ..........................................................................................43
3.1 Caratteristiche generali .........................................................43
4 Caratteristiche hardware................................................................44
4.1 Caratteristiche software........................................................45
5 Dimensione e installazione ............................................................46
6 Collegamenti elettrici.......................................................................46
6.1 Schema di collegamento.......................................................47
7 Funzione dei visualizzatori e tasti.................................................51
7.1 Indicatori numerici (display).................................................51
7.2 Significato delle spie di stato (led).......................................51
7.3 Tasti .............................................................................................52
8 Funzioni del regolatore....................................................................53
8.1 Modifica valore setpoint principale e di allarme ............53
9 Tuning ..................................................................................................53
9.1 Auto-tune...................................................................................54
9.2 Lancio del tuning manuale...................................................54
9.3 Tuning automatico .................................................................54
9.4 Memory card (opzionale)......................................................55
9.5 Funzione Latch On ..................................................................56
9.6 Funzionamento in doppia azione (Caldo-Freddo).........58
10 Funzione banda morta....................................................................60
11 Comunicazione seriale ....................................................................61
12 Configurazione..................................................................................64
12.1 Caricamento valori di default ..............................................64
12.2 Modifica parametri di configurazione...............................65
13 Parametri di configurazione ..........................................................66
14 Modi d’intervento allarme..............................................................75
15 Tabella segnalazioni anomalie.....................................................78

User manual - ATR121/141 - 5
Introduction
Thank you for choosing a Pixsys controller.
Versions with three/four digits display are available and the
device fits a wide range of applications with the most diverse
sensors like temperature/humidity/pressure sensors or linear
potentiometers.
Output options include both relay and SSR logic, but it is
possible to configure the unit also as indicator for installations
that do not require control or alarm ouputs.
PID and Autotune allow to adapt the regulation algorithm
to the installation , while LATCH ON function speeds up the
device calibration when linear potentiometers are used.
As on the latest Pixsys instrumentation, the configuration is
further simplified by the Memory cards which are provided
with internal battery and therefore do not require cabling to
power the controller.
1 Safety guide lines
Read carefully the safety guidelines and programming
instructions contained in this manual before using/
connecting the device. Disconnect power supply before
proceeding to hardware settings or electrical wirings.
Only qualified personnel should be allowed to use the device
and/or service it and in accordance to technical data and
environmental conditions listed in this manual.
Do not dispose electric tools together with household waste
material. In observance European Directive 2002/96/EC on
waste electrical and electronic equipment and its implemen-
tation in accordance with national law, electric tools that have
reached the end of their life must be collected separately and
returned to an environmentally compatible recycling facility.

6 - ATR121/141 - User manual
2 Model identification
ATR121-141 AD 12..24Vac ±10% 50/60Hz
12..35Vdc
ATR121-141 A 24 Vac ±10% 50/60 Hz (galvanical
isolation 2500V)
ATR121-141 B 230 Vac ±10% 50/60 Hz (galvanical
isolation 2500V)
ATR121-141 C 115 Vac ±10% 50/60 Hz (galvanical
isolation 2500V)
ATR121-141 ADT 12..35Vdc + RS485
Relay Q2 not available, alarm function
available on SSR output.
3 Technical features
3.1 General features
Display
3 displays (0,56 inch) on ATR121
4 displays (0,40 inch) on ATR141
+ 3 leds (OUT1 , OUT2 , FNC)
Environmental
conditions
Temperature 0-45 °C, Humidity 35..95
uR% (without condense)
Sealing Front panel: IP54 (IP65 with gasket) - Box:
IP30 - Terminals: IP20
Material Polycarbonate UL94V2 self-extinguishing
Weight Approx. 100 gr.
Power
consumption
ATR121/141-A: 2,6VA max
ATR121/141-B: 4,4VA max
ATR121/141-C: 5,7VA max
ATR121/141-AD: 2,4VA max
ATR121/141-ADT: 2,6VA max

User manual - ATR121/141 - 7
4 Hardware features
Analogue
inputs
AN1. Configurable via
software.
Thermocouple type:
K, S, R, J.
Thermoresistance:
PT100, PT500, PT1000,
Ni100, PTC1K, NTC10K
(β 3435K).
Linear: 0-10V, 0-20 or
4-20mA, 0-40mV
Potentiometers:
6KΩ, 150KΩ,
Acuracy: Ris. 16bit.
For Thermocouple:
@25°C ±0,5% (full scale)
or ± 1 digit, automatic
compensation of cold
junction from 0°C to 50°C.
For linear input:
0/4..20mA: 30000 points,
0..10V: 40000 points.
For potentiometers:
40000 points
Impedance:
0-10V: Ri>110KΩ
0-20mA: Ri<5Ω
4-20mA: Ri<5Ω
Relay
outputs
2relays (ATR121/141-
AD-A-B-C)
1 relay (ATR121/141-
ADT)
Configurable as
command and/or
alarm output
Contacts:
Q1: 8A-250V~ (10A mod.
AD and ADT)
for resistive loads
Q2: 5A-250V~
for resistive loads
SSR
output
1 SSR Configurable as
command output and/
or alarm output.
For ATR121/141 A-B-C
• 8Vdc/20mA
For ATR121/141 AD - ADT
• 15Vdc/30mA (if 12Vac)
• 30Vdc/30mA (if 24Vac)
• If DC supply is used,
output voltage is
equal to supply
voltage with max
30mA.

8 - ATR121/141 - User manual
4.1 Software features
Regulation
algorithms
ON-OFF with hysteresis.
P, PI, PID, PD with proportional time
Proportional
band 0..999°C or °F
Integral time 0..999s (0 excludes integral function)
Derivative time 0..999s (0 excludes derivative function)
Controller
functions
Manual or automatic Tuning,
configurable alarm, protection of
command and alarm setpoints, heating/
cooling PID function.
5 Dimensions and installation
Memory Card (optional)
with battery
Cod. 2100.30.003
Cod. 2100.30.005
42mm
insert memory card
inserimento memory card

User manual - ATR121/141 - 9
6 Electrical wirings
Although this controller has been designed to resist
electromagnetic interferences in industrial environments,
please observe following safety guidelines:
• Separate control line from power wires.
• Avoid proximity of remote control switches, electroma-
gnetic contactors, powerful engines and in all instances
use specific filters.
• Avoid proximity of power groups, especially those with
phase control
6.1 Wiring diagram
6.1.a Models: ATR121-AD/ADT and ATR141-AD/ADT
1 2
12..35 VDC
+-
12..24 VAC
ATR121/141-AD: Class 2 source
12..24Vac ±10% 50Hz/60Hz
12..35Vdc (comply with polarity)
NB: version T with RS485 only 12..35Vdc
Use copper conductors only

10 - ATR121/141 - User manual
6.1.b Models: ATR121-A-B-C and ATR141-A-B-C
1 2
Vac supply
ATR121/141 - A: 24Vac ±10% 50/60Hz
Class 2 source
ATR121/141 - B:
230Vac ±10% 50/60Hz
ATR121/141 - C:
115Vac ±10% 50/60Hz
Use copper conductors only
6.1.c AN1 Analogue Input
-
+
Tc
11 12
Shield/Schermo
For thermocouples K, S, R, J.
• Comply with polarity
• For possible extensions, use
compensated cable and terminals
suitable for the thermocouples
used(compensated)
• When shielded cable is used, it should
be grounded at one side only
(only for models: AD / ADT)
For a correct functioning of the device,
use sensors insulated from the ground.
Otherwise, use a single transformer
isolated for each instrument.
10 11 12
PT/NI100
Shield/Schermo
For thermoresistances PT100, NI100
• For the three-wire connection use
wires with the same section
• For the two-wire connection
short-circuit terminals 10 and 12
• When shielded cable is used, it should
be grounded at one side only
10
11
12
ROSSO
BIANCO
ROSSO

User manual - ATR121/141 - 11
Shield/Schermo
PTC/NTC
10 11
For thermoresistances NTC, PTC,
PT500, PT1000 e potentiometers
• When shielded cable is used, it should
be grounded at one side only to avoid
ground loop currents
Shield/Schermo
+VDC
910 11 12
V/I +-
For linear signals V/mA
• Comply with polarity
• When shielded cable is used, it should
be grounded at one side only
6.1.d Examples of connection for linear input
0...10V
1112
For signals 0..10V
• Comply with polarity
PRESSURE TRANSMITTER
SENSORE DI PRESSIONE
0/4...20mA
A
B
C
1112 9
For signals 0/4..20mA with three-wire
sensor
• Comply with polarity
C = Sensor output
B = Sensor ground
A = Sensor power supply (12V/30mA)
Versions AD / ADT: 12..24Vdc / 30mA
Versions
A-B-C: 8Vdc / 20 mA
EXTERNAL SUPPLY
ALIMENTAZIONE ESTERNA
PRESSURE TRANSMITTER
SENSORE DI PRESSIONE
0/4...20mA
B
C
1112
For signals 0/4..20mA with external
power of sensor
• Comply with polarity
C = Sensor output
B = Sensor ground

12 - ATR121/141 - User manual
PRESSURE TRANSMITTER
SENSORE DI PRESSIONE
C
4...20mA
A
12 9
For signals 0/4...20mA with two-wire sensor
• Comply with polarity
C = Sensor output
A = Sensor power supply
Versions AD / ADT: 12..24Vdc / 30mA
Versions A-B-C: 8Vdc / 20 mA
6.1.e Serial input
1176
-
+
Shield/Schermo
RS485
RS485 Modbus RTU communication
Do not use LT (line termination)
resistors
• For networks with more than five
instruments supply in low voltage
6.1.f Relay outputs
7 6 5 4
Q1
Q2
3
Capacity:
• Q1 (ATR121/141 A-B-C): 8A, 250Vac,
resistive loads, 105 operations
• Q1 (ATR121/141 AD/ADT): 10A, 250Vac,
resistive loads, 105operations
• Q2 (not on ATR121/141 ADT): 5A,
250Vac, resistive loads, 105operations

User manual - ATR121/141 - 13
6.1.g SSR output
SSR
8 9
SSR command output 12V/30mA
Versions AD / ADT: 12..24Vdc / 30mA
Versions A-B-C: 8Vdc / 20 mA
7 Display and keys functions
1
2 3 4
5 7
8
6
7.1 Numeric indicators (Display)
1
1234
Normally displays the process.
7.2 Meaning of status lights (Led)
2OUT1
ON when command output is active. When
it flashes, display shows the command output
setpoint (which can be modified by arrow keys).
3OUT2
ON when alarm output is active. When it flashes,
display shows the alarm output setpoint (which
can be modified by arrow keys).
4L1 ON when the controller communicates via serial
port.

14 - ATR121/141 - User manual
7.3 Keys
5“
m
”
• Allows to decrease main setpoint.
•
During configuration it allows to scroll through
parameters and to modify them togheter with SET
• If pressed after SET, it allows to decrease the
setpoints (command with OUT1 flashing/ alarm
with OUT2 flashing).
6“
n
”
• Allows to increase main stepoint.
•
During configuration it allows to scroll through
parameters and to modify them togheter with SET.
• If pressed after SET, it allows to increase the
setpoints (command with OUT1 flashing/ alarm
with OUT2 flashing).
7SET
• If pressed once it allows to visualize the
command setpoint.
• If pressed twice it allows to visualize the alarm
setpoint.
• Allows to modify configuration parameters.
8FNC • Allows to run the manual Tuning function.
• Allows to enter/exit from configuration.
8 Controller functions
8.1 Modifying main setpoint and alarm
setpoint values
Setpoint value can be changed by keyboard as follows:
Press Display Do
1“
n
”“
m
”
or SET
Display shows the
command setpoint
and OUT1 flashes.
Increase or decrease
the main setpoint
value. Afer 4s display
shows the process.

User manual - ATR121/141 - 15
2Press twice
SET
Display shows the
alarm setpoint and
OUT2 flashes.
Increase or decrease
the alarm setpoint
value. After 4s
display shows the
process.
9 Tuning
Tuning procedure allows to calculate PID parameters to obtain
a good regulation. It means a stable control of temperature/
process on setpoint without fluctuations and fast response to
deviations from setpoint caused by external noises.
Tuning procedure includes calculation and setting of the
following parameters:
• Proportional band (system inertia in °C if temperature).
• Integral time (system inertia expressed in time).
• Derivative time (defines the intensity of the controller
reaction to the variation of the measured value, normally
¼ of integral time). During Tuning procedure, it is not
possible to change the setpoint.
9.1 Auto-tune
Tuning procedure calculates the controller parameters, can be
manual/automatic according to selection on par. 27
tun | tune
.
9.2 Manual tuning
Manual procedure allows the user greater flexibility to decide
when to update PID algorithm parameters. It can be enabled
selecting Man on par. 27
tun
|
tune
.
Tuning launch: press FNC, display shows
t.of
, pressing “
n
”
it visualizes process value and
tun
|
tune
(alternately) up to
procedure completion (it can take some minutes). To cancel
procedure press FNC and after “
m
”to select
t.of
.

16 - ATR121/141 - User manual
9.3 Automatic tuning
Automatic tuning activates whenever the controller is switched
on or when the setpoint is modified to a value over 35%.
It can
be enabled selecting
aut
|
auto
on par. 27
tun
|
tune
.
To exit Tuning and keep P.I.D. values unchanged, press FNC
then “
m
”to select
t.of
.
9.4 Memory card (optional)
Parameters and setpoint values can be duplicated from one
controller to another using the Memory card.
2 modes are available:
• With the controller connected to the power supply:
Insert the memory card when the controller is off. At
starting display shows (only if the correct values are
saved in the memory card). Pressing “
n
”display shows
m Ld
. Confirming with FNC, the controller loads the new
data and starts again. Pressing “
m
”display shows
mno
and the controller starts keeping values unchanged.
U1
C1
CN1
1 6
Memory Card (optional)
with battery/con batteria
Cod. 2100.30.003
Memory Card (optional)
Cod. 2100.30.005
CN1
1 6
PIXSYS

User manual - ATR121/141 - 17
• With the controller not connected to power supply:
The memory card is equipped with an internal battery with
an autonomy of about 1000 operations (button battery
2032, replaceable). Insert the memory card and press the
programming button .
When writing the parameters, the led turns red and on
completing the procedure it turns green. It is possible to
repeat the procedure without any particular attention.
NB: it is not possible to transfer parameters to a device with
different code: red LED is ON.
Updating Memory Card
Insert memory card when controller is on, to copy parameters.
Enter configuration and change at least one parameter. Exit
configuration. Changes are saved automatically.
9.5 Latch On function
For use with input
p o1
(potentiometer ≤ 6K) and
po2
(potentiometer ≤150K ) and with linear inputs (0..10Volt,
0/4..20mA), it is possible to associate start value of the scale
(par.
Lo. n.
) to the minimum position of the sensor and value
of the scale end (par.
Hi. n.
) to the maximum position of the
sensor.
It is also possible to fix the point in which the controller will
display 0 (however keeping the scale range between Lo. n.
and Hi. n. ) using the “virtual zero” option by setting u.0m or
u.0s on par. 8 Lat | Latc.
If
u .0s is selected
, lthe virtual zero will reset after each
activation of the device; with
u.0m
, the virtual zero remains
fixed once tuned. To use the LATCH ON function configure
according to required operation the par. 8
La t
|
La tc
1.
1 The tuning procedure starts by exiting the configuration after changing
the parameter.

18 - ATR121/141 - User manual
For the calibration procedure refer to the following table:
Press Display Do
1FNC
Exit parameters
configuration.
Device visualizes
alternately process
and
La t
Place the sensor on
minimum operating
value (associated with
Lo . n
)
2“
m
”
Set the value on
minimum.
Display shows
Lo 
Place the sensor on
maximum operating
value (associated with
Hi . n
)
3“
n
”
Set the value to
maximum.
The display shows
Hi G
To exit standard
procedure press . For
“virtual zero” settings
place the sensor on the
zero point.
4SET
Set the virtual zero
value. Display shows
ui r
N.B.: For selection of
u.0s
the procedure
in point 4 should be
followed on each
re-activation.
To exit procedure press
FNC.
Max
Min Zero

User manual - ATR121/141 - 19
9.6 Dual action Heating-Cooling
The ATR121/141 is suitable also for systems requiring a
combined heating-cooling action. Command output must be
configured as Heating PID (par.11
reG.
=
Hea
|
Heat
and par. 15
p. b.
greater than 0), and one of the alarm must be configured
as cooling action (par. 19
AL.
=
coo
|
cooL
. Command output
must be connected to the actuator responsible for heating
action while the alarm output will control cooling action.
• Parameters to configure for the Heating PID are:
reG.
=
Hea
|
Heat
Command output type (Heating)
p. b.
: Heating proportional band
t.i .
: Integral time of heating and cooling
t.d.
: Derivative time of heating and cooling
t. c.
: Heating time cycle
• Parameters to configure for the Cooling PID are:
AL.
=
coo
|
cooL
. Alarm selection as cooling
p.b.m
: Proportional band multiplier
ou.d
|
ou.d.b.
: Overlapping/Dead band
t. c.2
: Cycle time for cooling output
Parameter
p.b.m
(that ranges from 1.00 to 5.00) determines
the proportional band of cooling basing on the formula:
Cooling proportional band =
p. b.
*
p.b.m
This gives a proportional band for cooling which will be
the same as heating band if
p.b.m
= 1.00, or 5 times greater
if
p.b.m
= 5.00.
Integral time and derivative time are the same for both
actions.
Parameter ou.d | ou.d.b. determines the overlapping
percentage between the two actions. For systems in which
the heating and cooling output must never be simultaneously
active a dead band (ou.d | ou.d.b. ≤ 0), can be configured, and
viceversa an overlapping (ou.d | ou.d.b. > 0):

20 - ATR121/141 - User manual
1
ACTIVE
ACTIVE
SPV
PV
 x  = COOL
 x  = COOL
 x  = COOL
 < 0
 = 0
 > 0
 (HEAT)
 (HEAT)
 (HEAT)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)
SPV
PV
ACTIVE
ACTIVE
SPV
PV
ACTIVE
ACTIVE
2
ACTIVE
ACTIVE
SPV
PV
 x  = COOL
 x  = COOL
 x  = COOL
 < 0
 = 0
 > 0
 (HEAT)
 (HEAT)
 (HEAT)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)
SPV
PV
ACTIVE
ACTIVE
SPV
PV
ACTIVE
ACTIVE
3
ACTIVE
ACTIVE
SPV
PV
 x  = COOL
 x  = COOL
 x  = COOL
 < 0
 = 0
 > 0
 (HEAT)
 (HEAT)
 (HEAT)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)
SPV
PV
ACTIVE
ACTIVE
SPV
PV
ACTIVE
ACTIVE
Parameter
t. c.2
has the same meaning of the cycle time
t. c.
for heating. Parameter
co.f
|
coo.f
(cooling fluid) pre-selects
the proportional band multiplier
P.b.m
and the cooling PID
cycle time
t. c.2
basing on the type of cooling fluid: