Pixsys ATR 142 Series User manual

ATR142

Summary
1 Introduction........................................................................................................ 3
2 Model Identification............................................................................................ 3
3 Technical Data................................................................................................... 4
3.1 General Features........................................................................................ 4
3.2 Hardware Features..................................................................................... 4
3.3 Software Features ...................................................................................... 5
4 Dimensions and Installation............................................................................... 5
5 Electrical wirings................................................................................................ 6
5.1 Wiring diagram ........................................................................................... 6
6 Display and Key Functions................................................................................ 9
6.1 Numeric Indicators (Display) ...................................................................... 9
6.2 Meaning of Status Lights (Led) ................................................................10
6.3 Keys.......................................................................................................... 10
7 Controller Functions......................................................................................... 11
7.1 Modifying Main Setpoint and Alarm Setpoint Values............................... 11
7.2 Auto-Tune................................................................................................. 11
7.3 Manual Tuning.......................................................................................... 11
7.4 Automatic Tuning...................................................................................... 12
7.5 Soft Start................................................................................................... 12
7.6 Automatic/Manual Regulation for % Output Control ................................ 12
7.7 Pre-Programmed Cycle............................................................................ 13
7.8 Memory Card (optional)............................................................................ 14
7.9 Loading default values.............................................................................. 15
8 LATCH ON Functions......................................................................................15
8.1 Digital Input Functions.............................................................................. 17
8.2 Dual Action Heating-Cooling .................................................................... 18
9 Serial Communication...................................................................................... 20
9.1 Slave......................................................................................................... 20
9.2 Master....................................................................................................... 24
10 Configuration ................................................................................................... 26
10.1 Modify Configuration Parameter............................................................... 26
11 Table of Configuration Parameters.................................................................. 27
12 Alarm Intervention Modes................................................................................ 39
13 Table of Anomaly Signals................................................................................ 44
14 Summary of Configuration parameters............................................................ 45

3
1 Introduction
Thank you for choosing a Pixsys controller.
With the ATR142 model Pixsys makes available in a single device all
the resources relevant to sensor input and actuators command, in
addition to the extended power range 24…230 Vac/Vdc. With 17
sensors to select and outputs configurable as relay or SSR command,
the user or retailer can reduce warehouse stock by rationalising
investment and device availability. The series is completed with
models equipped with serial communication RS485 Modbus. The
configuration is further simplified by the Memory cards which are
equipped with internal battery and therefore don’t require cabling to
power the controller.
2 Model Identification
The range of ATR142 controllers comes in two versions. Refer to the
table below to easily select your preferred model.
Models available, with power 24…230 Vac/Vdc +/-15% 50/60Hz – 3,5VA
ATR142-ABC
2 relays (8A+5A) + 1 Ssr
ATR142-ABC-T
1 relays 8A + 1 Ssr + Rs485

4
3 Technical Data
3.1 General Features
Displays 4 0.40 inch displays +
4 0.30 displays
Operating
temperature 0-45°C, humidity 35..95uR%
Sealing IP65 front panel (with gasket)
IP30 casing and IP20 terminals
Material Polycarbonate UL94V0 self-extinguishing
Weight 100 g
3.2 Hardware Features
Analogue
input
1: AN1
Configurable via software
Input
Thermocouple type K, S, R, J
Automatic compensation of cold
junction from 0°C to 50°C.
Thermoresistance: PT100,
PT500, PT1000, Ni100, PTC1K,
NTC10K (β3435K)
Linear: 0-10V, 0-20 or
4-20mA, 0-40mV
Potentiometers: 6KΩ, 150KΩ,
Tolerance (25°C)
+/-0.2 % ± 1 digit
for thermocouple
input, thermo
resistance and
V/mA.
Cold junction
accuracy 0.1°C/°C
Relay
output
2relays (Atr142-ABC)
1relay (Atr142-ABC-T)
Configurable as command and/or
alarm output
Contacts:
Q1 – 8A-250V~
Q2 – 5A-250V~
SSR output
1SSR
Configurable as command output
and/or alarm output.
12Vdc/30mA
Supply
Power supply
24..230 Vac/Vdc +/-15% 50/60Hz Power consumption 3.5VA

5
3.3 Software Features
Regulation algorithms
ON-OFF with hysteresis.
P, PI, PID, PD with proportional time
Proportional band
0...9999°C or °F
Integral time
0,0...999,9 sec (0 excluded)
Derivative time
0,0...999,9 sec (0 excluded)
Controller functions
Manual or automatic Tuning, configurable
alarms, protection of command and alarm
setpoints, activation of functions via digital
input, preset cycle with Start/Stop.
4 Dimensions and Installation
1 2 3
77 mm
3
5
m
m
53 mm
7

6
5 Electrical wirings
Although this controller was designed to resist noises in
industrial environments, pease notice following safety
guidelines:
• Separate the feeder line from the power lines.
• Avoid placing near units with remote control switches,
electromagnetic contactors, high powered motors and in all instances
use specific filters.
• Avoid placing near power units, particularly if phase controlled.
5.1 Wiring diagram
The connections are reported below for the three models available.
PIXSYS
ATR142-ABC
PTC/NTC
12345
6
7
8
9
10
11
12
PT/NI100/1K
2 wire 4/20mA
Power
Memory1
5A230V
Resistive
1/8HP
Q2
8A230V
Resistive
1/2HP
Q1
PTC/NTC
12345
6
7
8
9
10
11
12
PT/NI100/1K
2 wire 4/20mA
Power
Memory1
RS485
PIXSYS
ATR142-ABC-T
8A230V
Resistive
1/2HP
Q1

7
Power
Switching power supply with extended range
24…230 Vac/dc ±15% 50/60Hz – 5,5VA.
AN1 Analogue Input
For thermocouples K, S, R, J.
•Comply with polarity
•For possible extensions, use a compensated
wire and terminals suitable for the
thermocouples used (compensated)
•When shielded cable is used, it should be
grounded at one side only
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 to avoid ground loop
currents
1
2
3
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
For linear signals V/mA
•Comply with polarity
•When shielded cable is used, it should be
grounded at one side only to avoid ground loop
currents

8
Examples of Connection for linear input
For signals 0….10V
Comply with polarity
For signals 0/4….20mA with three-wire
sensor
Comply with polarity
C=Sensor output
B=Sensor ground
A=Sensor power
For signals 0/4….20mA with external power
of sensor
Comply with polarity
A=Sensor output
B=Sensor round
For signals 0/4….20mA with two-wire sensor
Comply with polarity
C=Sensor output
A=Sensor power supply
Serial input
RS485 Modbus RTU communication
Do not use LT (line termination)
resistors
•For networks with more than five
instruments supply in low voltage

9
Relay Q1 Output
Capacity:
Q1 - 8A/250V~ for resistive loads
Q2 - 5A/250V~ for resistive loads
SSR output
SSR command output 12V/30mA
Digital Input on ATR243-20ABC
Digital input using parameter .
The use of digital input in this version is possible
only with TC sensors, 0…10V, 0/4…20mA and
0…40mV
6 Display and Key Functions
1 2 3
M T R
87
6
2
1
9
10
12
11
6.1 Numeric Indicators (Display)
1
Normally displays the process. During the
configuration phase, it displays the parameter
being inserted.
2
Normally displays the setpoint. During the
configuration phase, it displays the parameter
value being inserted.

10
6.2 Meaning of Status Lights (Led)
3 ON when the output command is on. For motorised valve
command, led in on when valve is opening and blink
when closing.
4 ON when alarm 1 is on.
5 ON when alarm 2 is on.
6 ON when the “Manual” function is on.
7 ON when the controller is running an “Autotune” cycle.
8 ON when the controller communicates via serial port.
6.3 Keys
9
•Allows to increase the main setpoint.
•During the configuration phase, allows to slide
through parameters. Together with the
SET
key it
modifies them.
•Pressed after the
SET
key it allows to increase the
alarm setpoint.
10
•Allows to decrease the main setpoint.
•During the configuration phase, allows to slide
through parameters. Together with the
SET
key it
modifies them.
•Pressed after the
SET
key it allows to decrease the
alarm setpoint.
11
SET
•Allows to display the alarm setpoint and runs the
autotuning function.
•Allows to vary the configuration parameters.
12
FNC
•Allows to display the alarm setpoint and runs the
autotuning function.
•Allows to vary the configuration parameters.

11
7 Controller Functions
7.1 Modifying Main Setpoint and Alarm Setpoint Values
The setpoint value can be changed from the keyboard as follows:
Press Effect Operation
1
or
Value on display 2
changes Increases or decreases the main setpoint
2
SET
Visualize alarm
setpoint on display
1
3
o
Value on display 2
changes Increases or decreases the alarm set point value
7.2 Auto-Tune
The Tuning procedure calculates the controller parameters and can be
manual or automatic according to selection on parameter 46 .
7.3 Manual Tuning
The manual procedure allows the user greater flexibility to decide
when to update PID algorithm work parameters. The procedure can be
activated in two ways.
•By running Tuning from keyboard:
Press the
FNC
key until display 1 shows the writing with
display 2 showing , press , display 2 shows .
The led switches on and the procedure begins.
•By running Tuning from digital input:
Select on parameter 50 .
On first activation of digital input (commutation on front panel) the
led switches on and on second activation switches off.

12
7.4 Automatic Tuning
Automatic tuning activates when the controller is switched on or when
the setpoint is modified to a value over 35%.
To avoid an overshoot, the treshold where the controller calculates the
new PID parameters is determined by the setpoint value minus the
“Set Deviation Tune” ( see Parameter 47 ).
To exit Tuning and leave the PID values unchanged, just press the
FNC
key until display 1 shows the writing with the display
showing , press , display 2 shows .
The led switches off and the procedure finishes.
7.5 Soft Start
To reach the setpoint the controller can follow a gradient expressed in
units (e.g. degree/hour).
Set the increase value in parameter 51 with the desired
units/hour; only on subsequent activation the controller uses the soft
start function.
Automatic/manual tuning cannot be enabled if the Soft start is active.
7.6 Automatic/Manual Regulation for % Output Control
This function allows you to select automatic functioning or manual
command of the output percentage.
With parameter 49 , you can select two methods.
1. The first selection allows you to enable the
FNC
key with the writing on display 1, while
display two shows .

13
Press the key to show ; it is now possible,
during the process display, to change the output
percentage using the keys and . To return to
automatic mode, using the same procedure, select
on display 2: the led switches off and
functioning returns to automatic mode.
2. The second selection enables the same
functioning, but with two important variants:
•If there is a temporary lack of voltage or after switch-off, the
manual functioning will be maintained as well as the previously
set output percentage value.
•If the sensor breaks during automatic functioning, the controller
moves to manual mode while maintaining the output percentage
command unchanged as generated by the PID immediately
before breakage.
7.7 Pre-Programmed Cycle
The pre-programmed cycle function activates by setting in
parameter 48 .
The controller reaches setpoint1 basing on the gradient set in
parameter 51 , then it reaches maximum power up to
setpoint2. When the process reaches maximum power, this setpoint is
maintained for the time set in parameter 52 . On expiry, the
command output is disabled and the controller displays .
Time
Setpoint
Setpoint 1
Setpoint 2 Natural
cooling
Hold
Gradient
Max.
po er
The cycle starts at each activation of the controller, or via digital input if
it is enabled for this type of functioning (see parameter 50 ).

14
7.8 Memory Card (optional)
Parameters and setpoint values can be duplicated from one controller
to another using the Memory card.
There are two methods:
•With the controller connected to the power supply
Insert the memory card when the controller is off.
On activation display 1 shows and display 2 shows
(Only if the correct values are saved in the memory card). By
pressing the key display 2 shows , then confirm using the
FNC
key. The controller loads the new data and starts again.
•With the controller not connected to power supply.
The memory card is equipped with an internal battery with an
autonomy of about 1000 uses.
Insert the memory card and press the programming buttons.
When writing the parameters, the led turns red and on completing the
procedure it changes to green. It is possible to repeat the procedure
without any particular attention.
Updating Memory Card
To update the memory card values, follow the procedure described in
the first method, setting display 2 to so as not to load the
parameters on controller
2
.
Enter configuration and change at least one parameter.
Exit configuration. Changes are saved automatically.
2
If on activation the controller does not display it means no data have been
saved on the memory card, but it is possible to update values.

15
7.9 Loading default values
This procedure makes it possible to restore factory settings of the
instrument.
Premere Effetto Eseguire
1
FNC
for 3
seconds.
Display 1 shows
with the 1st digit
flashing, while display 2
shows
2
or
Change the flashing digit
and move to the next
one using the
SET
key.
Enter password
3
SET
to confirm
Instrument loads default
settings Turn off and on the instrument
8 LATCH ON Functions
For use with input (potentiometer 6KΩ) and
(potentiometer 150KΩ) and with linear input (0…10V, 0...40mV,
0/4…20mA), you can associate start value of the scale (parameter 6
) to the minimum position of the sensor and value of the scale
end (parameter 7 ) to the maximum position of the sensor
(parameter 8 configured as ).
It is also possible to fix the point in which the controller will display 0
(however keeping the scale range between and )
using the “virtual zero” option by setting or in
parameter 8 . If you set the virtual zero will reset after
each activation of the tool; if you set the virtual zero remains
fixed once tuned.

16
To use the LATCH ON function configure as you wish the parameter
.
3
For the calibration procedure refer to the following table:
Press Effect Operation
1
FNC
Exit parameters
configuration. Display 2
shows the writing .
Position the sensor on the
minimum functioning value
(associated with )
2
Set the value to minimum.
The display shows
Position the sensor on the
maximum functioning
position (associated with
)
3
Set the value to maximum.
The display shows
To exit the standard
procedure press
FNC
.
For “virtual zero” settings
position the sensor on the
zero point.
4
SET
Set the virtual zero value.
The display shows
N.B.: for selection of
the procedure in
point 4 should be followed
on each re-activation.
To exit the procedure press
FNC
.
MAX
MIN
ZERO
3
The tuning procedure starts by exiting the configuration after changing the parameter.

17
8.1 Digital Input Functions
Digital input is programmable for several functions which are useful to
simplify controller operability. Select the desired function on parameter
50 .
1. Hold function (enabled by setting or ) allows to
lock the reading of sensors when the digital input is active
(useful for wide ranging oscillation on less significant values).
During the lock phase, display 2 flashes and shows .
2. Enables/disables the autotuning function from digital input if the
parameter is set on .
3. Enable regulation with or .
4. Switch from automatic to manual functioning if is set
on or .
5. Start of pre-programmed cycle (see paragraph 7.7) with
.
6. Change setpoint function.
This function is useful where there are 2 to 4 working thresholds
required during system functioning without having to press the
arrow keys.
To enable the function use the parameter , by
selecting the number of setpoints desired (no. thresholds
switch). They can be switched during functioning by pressing
the
SET
key.
N.B.:
The digital input functions are not available with sensors PT100,
NI100, NTC, PTC, PT500, PT1000 e potentiometers.

18
8.2 Dual Action Heating-Cooling
ATR142 is also suitable also for systems requiring a combined heating-
cooling action.
The command output must be configured as Heating PID
( = and with a greater than 0), and one of the
alarms ( or ) must be configured as . The
command output must be connected to the actuator responsible for
heat, while the alarm will control cooling action.
The parameters to configure for the Heating PID are:
= Command output type (Heating)
: Heating proportional band
: Integral time of heating and cooling
: Derivative time of heating and cooling
: Heating time cycle
The parameters to configure for the Cooling PID are the following
(example: action associated to alarm1):
= Alarm1 selection (cooling)
: Proportional band multiplier
: Overlapping/Dead band
: Cooling time cycle
The parameter (that ranges from 1.00 to 5.00) determines the
proportional band of cooling basing on the formula:
Cooling proportional band = *
This gives a proportional band for cooling which will be the same as
heating band if = 1.00, or 5 times greater if = 5.00.
The integral time and derivative time are the same for both actions.
The parameter determines the percentage overlapping
between the two actions. For systems in which the heating output and
cooling output must never be simultaneously active a dead band
(≤0) must be configured, and vice versa you can configure an
overlapping ( > 0).

19
The following figure shows an example of dual action PID (heating-
cooling) with = 0 and = 0.

20
The parameter has the same meaning as the heating time
cycle .
The parameter (cooling fluid) pre-selects the proportional
band multiplier and the cooling PID time cycle basing
on the type of cooling fluid:
Cooling fluid type
Air 1.00 10
Oil 1.25 4
Water 2.50 2
Once selected, the parameter , the parameters ,
and can however be changed.
9 Serial Communication
9.1 Slave
ATR142-ABC-T, equipped with RS485, can receive and broadcast
data via serial communication using MODBUS RTU protocol. The
device operates as slave if parameter 59 is set as .
This function enables the control of multiple controllers connected to a
supervisory system (SCADA).
Each controller responds to a master query only if the query contains
the same address as that in the parameter . The addresses
permitted range from 1 to 254 and there must not be controllers with
the same address on the same line.
Address 255 can be used by the master to communicate with all the
connected equipment (broadcast mode), while with 0 all the devices
receive the command, but no response is expected.
ATR142 can introduce a delay (in milliseconds) in the response to the
master request. This delay must be set on parameter 58
Each parameter change is saved by the controller in the EEPROM
memory (100000 writing cycles), while the setpoints are saved with a
delay of ten seconds after the last change.
NB: Changes made to words that are different from those reported in
the following table can lead to malfunction.