Pixsys ATR 121 User manual

ATR 121
Controller
User manual

Table of contents
1 Safety guidelines ........................................................................... 6
1.1 Organization of safety notices............................................. 7
1.2 Safety Precautions................................................................... 7
1.3 Precautions for safe use ......................................................... 8
1.4 Environmental policy / WEEE .............................................10
2 Model identification ................................................................... 10
3 Technical features .......................................................................10
3.1 General features.....................................................................10
4 Hardware features ...................................................................... 11
4.1 Software features ..................................................................12
5 Dimensions and installation.................................................... 12
5.1 Electrical wirings.................................................................... 13
5.2 Wiring diagram...................................................................... 13
6 Display and keys functions....................................................... 17
6.1 Numeric indicators (Display).............................................. 17
6.2 Meaning of status lights (Led)............................................17
6.3 Keys............................................................................................ 18
7 Controller functions.................................................................... 19
7.1 Modifying main setpoint and alarm setpoint values .. 19
8 Tuning............................................................................................. 19
8.1 Auto-tune.................................................................................19
8.2 Manual tuning........................................................................20
8.3 Automatic tuning ..................................................................20
8.4 Memory card (optional).......................................................20
8.5 Latch ON function .................................................................21
8.6 Dual action Heating-Cooling.............................................23
9 Dead band function ...................................................................25
10 Configuration...............................................................................26
10.1 Loading default values.........................................................26
10.2 Modify configuration parameters ....................................26

11 Configuration parameters........................................................27
12 Alarm intervention modes........................................................36
13 Table of anomaly signals ..........................................................39
14 Qr-code ..........................................................................................39
14.1 3D file ........................................................................................40

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6 - ATR121 - User manual
Introduction
Thank you for choosing a Pixsys controller.
Versions with three 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 guidelines
Read carefully the safety guidelines and programming
instructions contained in this manual before connecting/
using the device.
Disconnect power supply before proceeding to hardware
settings or electrical wirings to avoid risk of electric shock,
fire, malfunction.
Do not install/operate the device in environments with
flammable/explosive gases.
This device has been designed and conceived for industrial
environments and applications that rely on proper safety
conditions in accordance with national and international
regulations on labour and personal safety. Any application
that might lead to serious physical dama ge/ life risk or involve
medical life support devices should be avoided.
Device is not conceived for applications related to nuclear
power plants, weapon systems, flight control, mass transpor-

User manual - ATR121 - 7
tation systems.
Only qualified personnel should be allowed to use device
and/or service it and only in accordance to technical data
listed in this manual.
Do not dismantle/modify/repair any internal component.
Device must be installed and can operate only within the
allowed environmental conditions. Overheating may lead
to risk of fire and can shorten the lifecycle of electronic
components.
1.1 Organization of safety notices
Safety notices in this manual are organized as follows:
Safety notice Description
Danger! Disregarding these safety guidelines and
notices can be life-threatening.
Warning!
Disregarding these safety guidelines
and notices can result in severe injury or
substantial damage to property.
Information! This information is important for preventing
errors.
1.2 Safety Precautions
This product is UL listed as open type process
control equipment. Danger!
If the output relays are used past their life
expectancy, contact fusing or burning may
occasionally occur.
Always consider the application conditions and
use the output relays within their rated load and
electrical life expectancy. The life expectancy
of output relays varies considerably with the
output load and switching conditions.
Danger!

8 - ATR121 - User manual
Loose screws may occasionally result in fire.
For screw terminals of relays and of power
supply, tighten screws to tightening torque of
0,5 Nm.
Warning!
A malfunction in the Digital Controller
may occasionally make control operations
impossible or prevent alarm outputs, resulting
in property damage. To maintain safety in the
event of malfunction of the Digital Controller,
take appropriate safety measures, such as
installing a monitoring device on a separate line.
Warning!
1.3 Precautions for safe use
Be sure to observe the following precautions to prevent
operation failure, malfunction, or adverse affects on the
performance and functions of the product. Not doing so may
occasionally result in unexpected events. Do not handle the
Digital Controller in ways that exceed the ratings.
• The product is designed for indoor use only. Do not use
or store the product outdoors or in any of the following
places.
- Places directly subject to heat radiated from heating
equipment.
- Places subject to splashing liquid or oil atmosphere.
- Places subject to direct sunlight.
- Places subject to dust or corrosive gas (in particular,
sulfide gas and ammonia gas).
- Places subject to intense temperature change.
- Places subject to icing and condensation.
- Places subject to vibration and large shocks.
• Installing two or more controllers in close proximity
might lead to increased internal temperature and this
might shorten the life cycle of electronic components. It
is strongly recommended to install cooling fans or other

User manual - ATR121 - 9
air-conditioning devices inside the control cabinet.
• Always check the terminal names and polarity and be sure
to wire properly. Do not wire the terminals that are not
used.
• To avoid noise, keep the controller wiring away from
power cables that carry high voltages or large currents.
Also, do not wire power lines together with or parallel
to Digital Controller wiring. Using shielded cables and
using separate conduits or ducts is recommended. Attach
a surge suppressor or noise filter to peripheral devices
that generate noise (in particular motors, transformers,
solenoids, magnetic coils or other equipment that have
an inductance component). When a noise filter is used at
the power supply, first check the voltage or current, and
attach the noise filter as close as possible to the Digital
Controller. Allow as much space as possible between the
Digital Controller and devices that generate powerful high
frequencies (high-frequency welders, high-frequency
sewing machines, etc.) or surge.
• A switch or circuit breaker must be provided close to
device. The switch or circuit breaker must be within
easy reach of the operator, and must be marked as a
disconnecting means for the controller.
• The device must be protected by a fuse 1A.
• Wipe off any dirt from the Digital Controller with a soft dry
cloth. Never use thinners, benzine, alcohol, or any cleaners
that contain these or other organic solvents. Deformation
or discoloration may occur.
• The number of non-volatile memory write operations
is limited. Therefore, use EEprom write mode when
frequently overwriting data.

10 - ATR121 - User manual
1.4 Environmental policy / WEEE
Do not dispose electric tools together with household waste
material.
According to European Directive 2012/19/EU on waste
electrical and electronic equipment and its implementation
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.
2 Model identification
ATR121-AD 12..24Vac ±10% 50/60Hz
12..35Vdc
ATR121-B 230 Vac ±10% 50/60 Hz (galvanical isolation
2500V)
3 Technical features
3.1 General features
Display 3 displays (0,56 inch) on ATR121
+ 3 leds (OUT1, OUT2 , L1)
Environmental
conditions
Temperature 0-45 °C, Humidity 35..95
uR% (without condense)
Max. altitude: 2000m
Sealing Front panel: IP54 (IP65 with gasket) - Box:
IP30 - Terminals: IP20
Material Polycarbonate UL94V2 self-extinguishing
Weight Approx. 100 gr.
Power
consumption
ATR121-B: 3 VA max
ATR121-AD: 2,4 VA max

User manual - ATR121 - 11
4 Hardware features
Analogue
inputs
AN1. Configurable
via software.
Thermocouple
type:K, S, R, J.
Thermoresistan-
ce: 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>110 KΩ
0-20mA: Ri<5Ω
4-20mA: Ri<5Ω
Relay
outputs
2relays (ATR121-
AD-B)
Configurable as
command and/or
alarm output
Contacts:
Q1: 8A-250V~
for resistive loads
Q2: 5A-250V~
for resistive loads
SSR
output
1 SSR Configurable
as command
output and/or
alarm output.
For ATR121-B
• 8Vdc/20mA
For ATR121-AD
• 15Vdc/30mA (if 12Vac)
• 30Vdc/30mA (if 24Vac)
• If DC supply is used,
output voltage is equal
to supply voltage with
max 30mA.

12 - ATR121 - 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 - 13
5.1 Electrical wirings
Although this controller has been designed to resist electro-
magnetic 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.
• Wiring of pins use crimped tube terminals or flexible/rigid
copper wire with diameter 0,2 to 1,5 mm2(min. AWG24,
max. AWG16, operating temperature: min. 70°C). Cable
stripping lenght 7 to 8 mm.
5.2 Wiring diagram
5.2.a Power supply
1 2
12..35 VDC
+-
12..24 VAC
ATR121-AD: Class 2 source
12..24Vac ±10% 50Hz/60Hz
12..35Vdc (comply with polarity)
Use copper conductors only
Categoria di sovratensione: II
1 2
Vac supply
ATR121-B:
230Vac ±10% 50/60Hz
Use copper conductors only
Categoria di sovratensione: II

14 - ATR121 - User manual
5.2.b 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)
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
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

User manual - ATR121 - 15
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
5.2.c
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: 12..24Vdc / 30mA
Versions
B: 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

16 - ATR121 - 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
Ver. AD: 12..24Vdc / 30mA
Ver. B: 8Vdc / 20 mA
5.2.d
Relay outputs
7 6 5 4
Q1
Q2
3
Current ratings:
•Q1: 8A, 250Vac, resistive loads, 105
operations
•Q2: 5A, 250Vac, resistive loads, 105
operations
5.2.e SSR output
SSR
8 9
SSR command output 12V/30mA
Ver. AD: 12..24Vdc / 30mA
Ver. B: 8Vdc / 20 mA

User manual - ATR121 - 17
6 Display and keys functions
2 3 4
7
8
5
6
1
6.1 Numeric indicators (Display)
11234 Normally displays the process.
6.2 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.

18 - ATR121 - User manual
6.3 Keys
5¶
• Allows to decrease main setpoint.
• During configuration it allows to scroll
through parameters and to modify them
togheter with |
• If pressed after |, it allows to decrease the
setpoints (command with OUT1 flashing/
alarm with OUT2 flashing).
6§
• Allows to increase main stepoint.
• During configuration it allows to scroll
through parameters and to modify them
togheter with |.
• If pressed after |, it allows to increase the
setpoints (command with OUT1 flashing/
alarm with OUT2 flashing).
7|
• 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.
8!• Allows to run the manual Tuning function.
• Allows to enter/exit from configuration.

User manual - ATR121 - 19
7 Controller functions
7.1 Modifying main setpoint and alarm
setpoint values
Setpoint value can be changed by keyboard as follows:
Press Display Do
1§¶
or |
Display shows the
command setpoint
and OUT1 flashes.
Increase or decrease
the main setpoint
value. Afer 4s display
shows the process.
2Press twice
|
Display shows the
alarm setpoint and
OUT2 flashes.
Increase or decrease
the alarm setpoint
value. After 4s
display shows the
process.
8 Tuning
Tuning procedure allows to calculate PID parameters to
obtain a optimal 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 for 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.
8.1 Auto-tune
Tuning procedure calculates the controller parameters, can be
manual/automatic according to selection on par. 27
tun.

20 - ATR121 - User manual
8.2 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.
Tuning launch: press !, display shows t. o f
, pressing §it
visualizes process value and tu n (alternately) up to procedure
completion (it can take some minutes). To cancel procedure
press !and after ¶to select t. o f
.
8.3 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
on par. 27 tun.
To exit Tuning and keep P.I.D. values unchanged, press !
then ¶to select t. o f .
8.4 Memory card (optional)
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
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 §display shows
m -Ld. Confirming with !, the controller loads the new
data and starts again. Pressing ¶display shows m -n o and
the controller starts keeping values unchanged.