Pixsys ATR 121 User manual
User manual - ATR121/141 - 3
Summary
1 Safety guide lines................................................................................5
2 Model identication...........................................................................6
3 Technical data......................................................................................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 ...........................................................................................13
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 Conguration.....................................................................................26
12.1 Modify conguration parameters....................................26
12.2 Loading default values........................................................26
12.3 Conguration parameters..................................................27
13 Alarm Intervention Modes..............................................................35
14 Table of anomaly signals................................................................38
15 Summary of Conguration parameters .....................................39
4 - ATR121/141 - Manuale d’uso
User manual - ATR121/141 - 5
Introduction
Thank you for choosing a Pixsys controller.
Versions with three/four digits display are available and the
device ts 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 congure 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 conguration is
further simplied 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 qualied 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 identication
ATR- AD ..Vac ±% /Hz
..Vdc
ATR- A Vac ±% / Hz
ATR- B Vac ±% / Hz
ATR- C Vac ±% / Hz
ATR- ADT ..Vdc + RS
Relay Q not available, alarm function
available on SSR output.
3 Technical features
3.1 General features
Display displays (, inch) on ATR
displays (, inch) on ATR
+ leds (OUT , OUT , FNC)
Operating
temperature -°C
Humidity ..uR%
Sealing IP (
front panel
) with gasket - IP (box)
IP (terminals)
Material
Polycarbonate
ULV
self-extinguishing
Weight Approx. gr.
Power
consumption
ATR/-A: ,VA max
ATR/-B: ,VA max
ATR/-C: ,VA max
ATR/-AD: ,VA max
ATR/-ADT: ,VA max
User manual - ATR121/141 - 7
4 Hardware features
Analogue
inputs
AN. Congurable via
software. Thermocouple
type:K, S, R, J. Automatic
compensation of cold
junction from °C to
°C.
Thermoresistance:
PT, PT, PT,
Ni, PTCK, NTCK
(β K). Linear: -V,
- or -mA, -mV
Potentiometers:
K, K,
Tolerance (°C)
+/-. % ± digit (full
scale) for thermocouple
input, thermo-
resistance and V/mA.
Cold junction accuracy
.°C/°C
Impedance:
-V: Ri>K
-mA: Ri<
-mA: Ri<
Relay
outputs
relays
(ATR/-AD-
A-B-C)
relay
(ATR/-ADT)
Congurable as
command and/or alarm
output
Contacts:
Q: A-V~ (A mod.
AD and ADT)
for resistive loads
Q: A-V~
for resistive loads
SSR
output
SSR Congurable as
command output and/or
alarm output.
Mod. ATR/ A-B-C
Mod. ATR/ AD - ADT
output voltage is
equal to supply
voltage with max
mA.
8 - ATR121/141 - User manual
4.1 Software features
Regulation
algorithms ON-OFF
with hysteresis
.
P, PI, PID, PD with proportional time
Proportional band ..°C or °F
Integral time ..s ( excludes integral function)
Derivative time ..s ( excludes derivative function)
Controller
functions
Manual or automatic Tuning, congurable
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:
-
tic contactors, powerful engines and in all instances use
specic lters.
phase control
6.1 Wiring diagram
Models: ATR-AD / ADT and ATR-AD / ADT
1 2
12..35 VDC
+-
12..24 VAC
ATR/ - AD: Class source
..Vac ±% Hz/Hz
..Vdc (comply with polarity)
NB: version “T” with RS only ..Vdc
Use copper conductors only
Models: ATR - A - B - C and ATR - A - B - C
1 2
Vac supply
ATR/ - A:
Vac ±% /Hz Class
source
ATR/ - B:
Vac ±% /Hz
ATR/ - C:
Vac ±% /Hz
Use copper conductors only
10 - ATR121/141 - User manual
AN Analogue Input
-
+
Tc
11 12
Shield/Schermo
For thermocouples K, S, R, J.
compensated cable and terminals
suitable for the thermocouples
used(compensated)
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 PT, NI
with the same section
short-circuit terminals and
be grounded at one side only
10
11
12
ROSSO
BIANCO
ROSSO
Shield/Schermo
PTC/NTC
10 11
For thermoresistances NTC, PTC, PT,
PT e potentiometers
•
When shielded cable is used, it should
be grounded at one side only to avoid
ground loop currents
User manual - ATR121/141 - 11
Shield/Schermo
+VDC
910 11 12
V/I +-
For linear signals V/mA
be grounded at one side only
Examples of connection for linear input
0...10V
1112
For signals ….V
Comply with polarity
PRESSURE TRANSMITTER
SENSORE DI PRESSIONE
0/4...20mA
A
B
C
1112 9
For signals /….mA with three-wire
sensor
C = Sensor output
B = Sensor ground
A = Sensor power supply (V/mA)
Versions AD / ADT: ..Vdc / mA
Versions
A-B-C: Vdc / mA
EXTERNAL SUPPLY
ALIMENTAZIONE ESTERNA
PRESSURE TRANSMITTER
SENSORE DI PRESSIONE
0/4...20mA
B
C
1112
For signals /..mA with external power
of sensor
C = Sensor output
B = Sensor ground
PRESSURE TRANSMITTER
SENSORE DI PRESSIONE
C
4...20mA
A
12 9
For signals /...mA with two-wire sensor
C = Sensor output
A = Sensor power supply
Versions AD / ADT: ..Vdc / mA
Versions A-B-C: Vdc / mA
12 - ATR121/141 - User manual
Serial input
1176
-
+
Shield/Schermo
RS485
RS Modbus RTU communication
Do not use LT (line termination)
resistors
instruments supply in low voltage
Relay outputs
7 6 5 4
Q1
Q2
3
Capacity
:
Q
(
ATR/ A-B-C
): A, Vac,
resistive loads,
operations
Q
(
ATR/ AD/ADT
): A, Vac,
resistive loads
,
operations
Q
(
not on ATR/ ADT)
: A, Vac,
resistive loads,
operations
SSR output
SSR
8 9
SSR command output V/mA
Versions AD / ADT: ..Vdc / mA
Versions A-B-C:
Vdc / mA
User manual - ATR121/141 - 13
7 Display and keys functions
1
2 3 4
5 7
8
6
7.1 Numeric indicators (Display)
1234 Normally displays the process.
7.2 Meaning of status lights (Led)
OUT
ON when command output is active. When
it ashes, display shows the command output
setpoint (which can be modied by arrow keys).
OUT
ON when alarm output is active. When it ashes,
display shows the alarm output setpoint (which
can be modied by arrow keys).
L ON when the controller communicates via serial
port.
7.3 Keys
Allows to decrease main setpoint
.
parameters and to modify them togheter with
SET
.
SET
, it allows to decrease the
setpoints (command with OUT ashing/ alarm
with OUT ashing).
14 - ATR121/141 - User manual
parameters and to modify them togheter with
SET
.
SET
, it allows to increase the
setpoints (command with OUT ashing/ alarm
with OUT ashing).
SET
command setpoint.
setpoint.
FNC
Allows to enter/exit from conguration.
8 Controller functions
8.1 Modifying main setpoint and alarm
setpoint values
Setpoint value can be changed by keyboard as follows:
Press Display Do
or SET
Display shows the
command setpoint
and OUT ashes.
Increase or decrease
the main setpoint
value.
Afer s display shows
the process.
volte SET
Display shows the
alarm setpoint and
OUT ashes.
Increase or decrease
the alarm setpoint
value.
After s display
shows the process.
User manual - ATR121/141 - 15
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 uctuations 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 (denes 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 and can
be manual or automatic according to selection on par. 27 tun
| tune.
9.2 Manual tuning
Manual procedure allows the user greater exibility to decide
when to update PID algorithm parameters. It
can be enabled
selecting Man on par. 27 tun | tune.
•Tuninglaunch:
Press
FNC
, display shows t. o f, pressing it visualizes process
value and tun | tune (alternately) up to procedure completion
(it can take some minutes). To cancel procedure press
FNC
and
after to select t. o f.
16 - ATR121/141 - User manual
9.3 Automatic tuning
Automatic tuning activates whenever the controller is switched
on or when the setpoint is modied 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
to select t. o f.
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:
• Withthecontrollerconnectedtothepowersupply:
Insert the memory card when the controller is o. At starting
display shows (only if the correct values are saved in the
memory card). Pressing display shows m -Ld. Conrming
with
FNC
, the controller loads the new data and starts again.
Pressing display shows m -n o 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
• Withthecontrollernotconnectedtopowersupply:
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
dierent code: red LED is ON.
Updating Memory Card
Insert memory card when controller is on, to copy
parameters. Enter conguration and change at least one
parameter. Exit conguration. 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 x 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 xed
once tuned. To use the LATCH ON function congure according
to required operation the par. 8 La t | La t c
1
.
For the calibration procedure refer to the following table:
1
The tuning procedure starts by exiting the conguration after changing
the parameter.
18 - ATR121/141 - User manual
Press Display Do
FNC
Exit parameters
conguration.
Device visualizes
alternately process
and La t
Place the sensor on
minimum operating
value (associated with
Lo. n)
Set the value on
minimum.
Display shows Lo
Place the sensor on
maximum operating
value (associated with
Hi. 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.
SET
Set the virtual zero
value.
Display shows ui r
N.B.: For selection of
u.0s the procedure
in point 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
congured as Heating PID (par.11 reG. = Hea | Heat and par. 15
p. b . greater than 0), and one of the alarm must be congured as
cooling action (par. 19 AL. = co o | cooL. Command output must
be connected to the actuator responsible for heating action
while the alarm output will control cooling action.
•ParameterstocongurefortheHeatingPIDare:
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
•ParameterstocongurefortheCoolingPIDare:
AL. = co o | 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 congured, and
viceversa an overlapping (ou.d | ou.d.b. > 0):
20 - ATR121/141 - User manual
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
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
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 uid) pre-selects the
proportional band multiplier P.b.m and the cooling PID cycle
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