Pixsys ATR 171 User manual

ATR 171
Controller / Regolatore
User manual / Manuale d’uso

User manual - ATR171 3
Table of contents
1 Safety standards....................................................................................................................................5
2 Identification of the model.................................................................................................................5
3 Technical data........................................................................................................................................5
3.1 Genera l features..........................................................................................................................5
3.2 Hardware features.......................................................................................................................6
3.3 Software features ........................................................................................................................6
4 Dimension and installation................................................................................................................7
5 Electrical connections..........................................................................................................................7
5.1 Connection diagram ..................................................................................................................8
6 Display and keys functions...............................................................................................................14
6.1 Numeric indicators (Display)..................................................................................................14
6.2 Meaning of Status Lights (Led)...............................................................................................14
6.3 Keys................................................................................................................................................15
7 Dual input mode (only for ATR171-23ABC-T)................................................................................15
7.1 Selection of process value related to the command output and to the alarms........16
7.2 Remote setpoint.........................................................................................................................16
8 Controller functions............................................................................................................................17
8.1 Modification of main and alarm setpoint value...............................................................17
8.2 Auto-tuning.................................................................................................................................17
8.3 Manual Tuning...........................................................................................................................17
8.4 Automatic Tuning......................................................................................................................17
8.5 Automatic / manual regulation of % control output.......................................................17
8.6 Soft-Start......................................................................................................................................18
8.7 Pre-programmed cycle ............................................................................................................18
8.8 Memory Card (optional)..........................................................................................................19
8.9 LATCH-ON function ..................................................................................................................19
8.10 Timer function............................................................................................................................20
8.11 Digital input functions (only for ATR171-11/12/14ABC) ...................................................21
8.12 Heating-Cooling P.I.D. .............................................................................................................21
9 Serial communication (only for ATR171-23ABC-T)......................................................................23
9.1 Modbus RTU................................................................................................................................23
10 Configuration.......................................................................................................................................26
10.1 Modify configuration parameters ........................................................................................26
10.2 Loading default values.............................................................................................................26
11 Table of configuration parameters ................................................................................................27
12 Alarm Intervention Modes................................................................................................................42

4 ATR171 - Manuale d’uso
Indice degli argomenti
1 Norme di sicurezza .............................................................................................................................47
2 Identificazione di modello................................................................................................................47
3 Dati tecnici ............................................................................................................................................47
3.1 Caratteristiche generali ...........................................................................................................47
3.2 Caratteristiche Hardware........................................................................................................48
3.3 Caratteristiche software..........................................................................................................48
4 Dimension and installation..............................................................................................................49
5 Collegamenti elettrici.........................................................................................................................49
5.1 Schema di collegamento.........................................................................................................50
6 Funzione dei visualizzatori e tasti...................................................................................................56
6.1 Indicatori numerici (Display)..................................................................................................56
6.2 Significato delle spie di stato (Led)........................................................................................56
6.3 Tasti ...............................................................................................................................................57
7 Modalità doppio ingresso (solo per ATR171-23ABC-T)...............................................................57
7.1 Selezione grandezza correlata al comando e agli allarmi.............................................58
7.2 Setpoint remoto ........................................................................................................................58
8 Funzioni del regolatore......................................................................................................................59
8.1 Modifica valore setpoint principale e setpoint di allarme..............................................59
8.2 Auto-Tuning ................................................................................................................................59
8.3 Lancio del Tuning Manuale ....................................................................................................59
8.4 Lancio del Tuning Automatico...............................................................................................59
8.5 Regolazione automatico / manuale per controllo % uscita ..........................................59
8.6 Soft-Start......................................................................................................................................60
8.7 Ciclo pre-programmato...........................................................................................................60
8.8 Memory Card (opzionale) .......................................................................................................61
8.9 Funzione LATCH ON..................................................................................................................61
8.10 Funzione timer ...........................................................................................................................62
8.11 Funzioni da Ingresso digitale (solo per ATR171-11/12/14ABC) .......................................63
8.12 Funzionamento in doppia azione (caldo-freddo)............................................................63
9 Comunicazione Seriale (solo per ATR171-23ABC-T)....................................................................65
9.1 Modbus RTU................................................................................................................................65
10 Configurazione ...................................................................................................................................68
10.1 Modifica parametro di configurazione ...............................................................................68
10.2 Caricamento valori di default ................................................................................................69
11 Tabella parametri di configurazione .............................................................................................69
12 Modi d’intervento allarme................................................................................................................86
13 Tabella segnalazioni anomalie.......................................................................................................89

User manual - ATR171 5
Introduction
Thank you for having chosen a Pixsys instrument. With ATR171 model, Pixsys
integrates in a single device all options for sensors reading and actuators control,
beside an useful supply with extended range 24..230 Vac/Vdc. Thanks to 17
selectable probes and outputs configurable as relay or SSR, the user or the retailer
can reduce stock needs. The series includes also a model with double analogue
input, serial communication RS485 ModbusRTU and linear output 0-10 V, 0/4-20 mA.
The possibility to repeat parameterization is simplified by the Memory Cards with
internal battery that do not require power supply for the controller.
1 Safety standards
Carefully read the instructions and safety measures in this manual before using the
device. Disconnect power before performing any interventions on the electrical
connections or hardware settings.
Only qualified personnel may use/perform maintenance in full respect of the
technical data and declared environmental conditions.
Do not dispose of electrical appliances together with household waste.
In compliance with the European Directive 2002/96/EC, waste electrical equipment
must be collected separately for eco-compatible reuse or recycling.
2 Identification of the model
Power supply 24..230 Vac/Vdc +/-15% 50/60 Hz – 5,5 VA
ATR171-11 ABC 1 analogue input + 1 relay 8 A + 1 SSR
ATR171-12 ABC 1 analogue input + 2 relays 8 A + 1 SSR
ATR171-14 ABC 1 analogue input + 3 relays 8 A + 1 relay 5 A (30 V)
ATR171-23 ABC-T 2 analogue input + 3 relays 8 A - 1 output SSR/V/mA+ RS485
3 Technical data
3.1 Genera l features
Display 4 display 0,50 inches - 4 display 0,30 inches
Operating
temperature Operating temperature 0-45°C - Humidity 35..95 Rh%
Protection IP54 front panel, box IP30, terminal block IP20
Material Box: Noryl UL94V1 self-exstinguish
Front panel: PC ABS UL94V0 self-exstinguish
Weight Approximately 250g

6 ATR171 - User manual
3.2 Hardware features
Analogue
imput
AI1 - AI2:
Configurable via software.
Input:
Thermocouple type K, S, R, J.
Automatic compensation of
cold junction from 0..50 °C.
Thermoresistances: PT100,
PT500, PT1000, Ni100, PTC1K,
NTC10K (β 3435K).
- ONLY AI1
Input V/mA: 0-10 V, 0-20 or
4-20 mA, 0-40 mV.
Input potentiometer: 6 KΩ,
150 KΩ.
Tolerance (25 °C)
+/-0.2% ±1 digit for thermo-
couple, thermoresistance and
V / mA.
Cold junction accuracy 0.1 °C/°C.
Impedance:
0-10 V: Ri>110 KΩ
0-20 mA: Ri<5 Ω
4-20 mA: Ri<5 Ω
0-40 mV: Ri>1 MΩ
Relay
output
Configurable as control and
alarm output.
Contacts:
Q1, Q2, Q3:
8 A - 250 V~ for resistive charges;
Q4: 5 A - 30 V for resistive
charges.
SSR/V/mA
output
1 SSR - V/mA
Configurable as control output,
alarm, retransmission of process
or setpoint.
12 Vdc / 30 mA.
Configurable:
• 0..10 V (9500 points);
• 0..20 mA (7500 points);
• 4..20 mA (6000 points).
Supply Extended range 24..230 V AC/V
DC ±15 % 50/60 Hz. Consumption: 5.5 VA
3.3 Software features
Control
algorithm
ON - OFF with hysteresis.
P., P.I., P.I.D., P.D. proportional time.
Proportional
band 0..9999 °C or °F
Integral time 0,0..999,9 sec (0 excludes)
Derivative
time 0,0..999,9 sec (0 excludes)
Controller
functions
Manual or automatic tuning, selectable alarms, protection of
control and alarm setpoints, function selection from digital input,
start/stop preprogrammed cycle.

User manual - ATR171 7
4 Dimension and installation
ATR171
FNC
PRGM
SET
C1 A1
C2 A2
TUN A3 MAN REM RUN
1
2
3
4
5
6
7
8
9
SUPPLY
24...230V
AC/DC
SSR/V
mA
+
-
ATR171-23ABC-T
10
11
12
13
14
15
16
17
18
+Vdc
Q1
8A
230V
1/2HP
+
-
TC
485+
485-
+
-
TC
AI1
V
mA
Q2
8A
230V
1/2HP
Q3
8A
230V
1/2HP
AI2
CN1
1 6
16
Memory Card
U1
C1
CN1 16
MEMORY C.241
DIMA DI FORATURA
66,5 x 66,5 mm
Frontalpanel cut-out 89 mm
510
66 mm
72 mm
72 mm
Spessore suggerito Suggested thickness
2÷8 mm
42mm
insert / inserimento
Memory Card
Memory Card (optional)
Cod. MEMORY C241
Memory Card (optional)
with battery Cod. MEMORY C243
5 Electrical connections
Even though this instrument has been designed to withstand the most
heavy-duty disturbances in industrial environments, the following
precautions should be taken:
• Distinguish the supply line from the power lines.
• Keep contactor units, electromagnetic contactors and high power motors away
from each other and anyway use specific filters.
• Keep power units away from each other, especially if with phase control.

8 ATR171 - User manual
5.1 Connection diagram
ATR171-11ABC ATR171-12ABC
ATR171-14ABC ATR171-23ABC-T

User manual - ATR171 9
5.1.a Power supply
1
2
SUPPLY
24...230V
AC/DC
Switching supply with exstended range 24..230 Vac/dc
±15% 50/60 Hz – 5,5 VA.
5.1.b Analogue input AI1
17
18
TC
AI1
Shield/Schermo
For thermocouples K, S, R, J.
• Comply with polarity.
• For extensions make sure to use the correct extension/
compensating cable.
• When shielded cable is used, it should be grounded at
one side only.
16
17
18
AI1
Shield/Schermo
PT/NI100
For thermoresistances PT100, NI100.
• For a three-wires connection use cables with the same
diameter.
• For a two-wires connection short-circuit terminals 16
and 18.
• When shielded cable is used, it should be grounded at
one side only.
18
17
16
RED / ROSSO
WHITE / BIANCO
RED / ROSSO
16
17
AI1
Shield/Schermo
PTC/NTC
For thermoresistances NTC, PTC, PT500, PT1000 and
linear potentiometers.
When shielded cable is used, it should be grounded at
one side only.
12
17
18
AI1
V
mA
+Vdc
Shield/Schermo For linear signals Volt / mA.
• Comply with polarity.
• When shielded cable is used, it should be grounded at
one side only.

10 ATR171 - User manual
5.1.c Analogue input AI2 (only for ATR171-23ABC-T)
To enable the second analogue input, set the dip
switches as indicated in the figure.
In this configuration the serial RS485 is not available.
14
15
TC
AI2
Shield/Schermo
For thermocouples K, S, R, J.
• Comply with polarity.
• When extending thermocouples be sure to use the
correct extension/compensating cable.
• When shielded cable is used, it should be grounded at
one side only.
13
14
15
AI2
Shield/Schermo
PT/NI100
For thermoresistances PT100, NI100.
• For a three-wires connection use cables with the same
diameter.
• For a two-wires connection short-circuit terminals 13
and 15.
• When shielded cable is used, it should be grounded at
one side only.
15
14
13
RED / ROSSO
WHITE / BIANCO
RED / ROSSO
13
14
AI2
Shield/Schermo
PTC/NTC
For thermoresistances NTC, PTC, PT500, PT1000 and
linear potentiometers.
When shielded cable is used, it should be grounded at
one side only.
Examples of connection for linear input
17
18
0...10V
+
-
For linear signals 0..10 V.
Comply with polarity.

User manual - ATR171 11
PRESSURE TRANSMITTER /
SENSORE DI PRESSIONE
P :0...100mbar Pmax :3bar T :0..70°C
OUT : 4...20mA IN :9...33V DC
12
17
18
B
C
A
4...20mA
For linear signals 0/4..20 mA with three-wires sensors.
Comply with polarity:
A= Sensor supply
B= Sensor ground
C= Sensor output
External supply /
Alimentazione esterna
P :0...100mbar Pmax :3bar T :0..70°C
OUT : 4...20mA IN :9...33V DC
PRESSURE TRANSMITTER /
SENSORE DI PRESSIONE
17
18
C
B
4...20mA
For linear signals 0/4..20 mA with external power supply
for sensor.
Comply with polarity:
C= Sensor output
B= Sensor ground
P :0...100mbar Pmax :3bar T :0..70°C
OUT : 4...20mA IN :9...33V DC
18
12
C
A
PRESSURE TRANSMITTER /
SENSORE DI PRESSIONE
4...20mA
For linear signals in current 0/4..20 mA with two-wires
sensors.
Comply with polarity:
C= Sensor output
A= Sensor supply
5.1.d Serial input (only for ATR171-23ABC-T)
To enable the second analogue input, set the dip
switches as indicated in the figure.
In this configuration the second analogue input is not
available.
13
RS485
14
15
Shield/Schermo
Communication RS485 Modbus RTU.
For networks with more than five instruments supply in
low voltage.

12 ATR171 - User manual
5.1.e Relay outputs Q1, Q2, Q3
3
4
5
Q1
8A
230V
1/2HP
6
7
8
9
Q2
8A
230V
1/2HP
Q3
8A
230V
1/2HP
Contacts capacity:
8 A, 250 Vac, resistive charge 105operations;
30/3 A, 250 Vac, cosφ= 0.3, 105operations.
5.1.f Relay output Q4 (only for ATR171-14ABC)
10
11
Q4
5A
30V
1/8HP
Contacts capacity:
5 A, 30 Vac/dc, resistive 18x104operations.

User manual - ATR171 13
5.1.g SSR output
SSR
10
11
SSR Command output 12 V / 30 mA.
To use SSR output it is necessary to set
channel 1 of DIP2 as indicated in the figure.
5.1.h Output mA / Volt (only for ATR171-23ABC-T)
10
11
mA
Analogue output in mA configurable as command (Par.
c.out
) or retransmission of process-setpoint (Par. re t r.).
To use SSR output it is necessary to set
channel 1 of DIP2 as indicated in the figure.
10
11
V
Analogue output in Volt configurable as command
(Par. c.out ) or retransmission of process-setpoint (Par.
re t r.).
To use SSR output it is necessary to set
channel 1 of DIP2 as indicated in the figure.
5.1.i Digital Input (only for ATR171-11/12/14-ABC)
12
13
+Vdc
DI
Digital Input (Par. d G t.i .).

14 ATR171 - User manual
6 Display and keys functions
ATR171
FNC
PRGM
SET
C1 A1
C2 A2
TUN A3 MAN REM RUN
C1 A1
C2 A2
TUN A3 MAN REM RUN
1
3
4
7
26 5
9 8 10
1613 14
12 15
11
6.1 Numeric indicators (Display)
11234 Normally displays the process. During the configuration phase, it
displays the parameter being inserted.
21234 Normally displays the setpoint. During the configuration phase, it
displays the parameter value being inserted.
6.2 Meaning of Status Lights (Led)
3C1 On when command output is active. For open / close logic: on
during valve opening.
4C2 For open/ close logic: on during valve closing.
5A1 On when alarm 1 is active.
6A2 On when alarm 2 is active.
7A3 On when alarm 3 is active.
8MAN On when “Manual” function is active.
9TUN On when controller is executing an auto-tuning cycle.
10 REM On when serial communication is in progress.
11 RUN On when counting of Timer function is active.

User manual - ATR171 15
6.3 Keys
12

• Increases main setpoint.
• In configuration mode allows to scroll and modify parameters.
• Press after SET key increases alarm setpoints or time value of
timer.
13

• Decreases main setpoint.
• In configuration mode allows to scroll and modify parameters.
• Press after SET key decreases alarm setpoints or time value of
timer.
14 SET
• Allows to visualize alarm setpoints or time value of Timer.
• In configuration mode allows to access the parameter to change
and confirm its modification.
15 FNC
• Allows to enter tuning launch, selection automatic / manual.
• In configuration mode operates as exit key (ESCAPE).
• If
U.M.C.P. other then Di s . , it is possible to modify parameters of
pre-programmed cycle.
16 PRGM
• If pressed allows to enter configuration password.
• In configuration mode assigns at selected parameter a mnemonic
code or a number.
• Starts or stops timer counting.
• It allows to reset alarms if programmed for manual reset.
7 Dual input mode (only for ATR171-23ABC-T)
To enable second input it is necessary to set dip switches as indicated in the figure.
In this configuration some parameters
and functions are not available. For
exemple: RS485 serial, preprogrammed
cycle and soft-start function are desabled.

16 ATR171 - User manual
7.1 Selection of process value related to the command
output and to the alarms
When second input is enabled (par. 9 Sen.2 other than di s .) it is possible to choose
the process value to be related to command output, to alarms and to retransmission.
Following options are available:
• Pro . 1: Value read by input AI1;
• Pro . 2: Value read by input AI2;
• Mean: Mean between inputs AI1 and AI2;
• di FF. : Difference between inputs: AI1-AI2;
• AbS. d .: Difference between inputs AI1-AI2 as absolute value.
• Process related to command output must be set on parameter 15 c.Pro ..
• Process related to alarms must be set on par. 34 A.1Pr. for alarm 1, on par. 43 A.2Pr.
for alarm 2 and on par. 52 A.3Pr. for alarm 3.
• Value to retransmit must be set on par. 79 re t r. .
It is possible to choose the visualization for display 2 on parameter 77 u.i.d.2 .
Mean and difference are available only if both inputs are configured for
temperature sensors.
7.2 Remote setpoint
It is possible to enable remote setpoint function setting En . on par. 16 rEM.S..
ATR171
FNC
PRGM
SET
PROBE
OUT
ATR171
ATR171
FNC
PRGM
SET
PROBE
OUT
ATR171
RT1
3738394041
42
43
4445 29303132 33
34
3536 28
19 20 21 22 23 24 25 26 27 10 11 12 13 14 15 16 17 18 1 2 3 4 5 678 9
46474849
4...20mA
0...10V
REMOTE SETPOINT
REMOTE SETPOINT
Control Loop
Control Loop
In this configuration the value read by one of the two inputs becomes the main
control setpoint:
• If par. 15 c.Pro . is set as P r o .1 , AI1 becomes the main process (command) and AI2
becomes the setpoint value;
• If par. 15 c.Pro . is set as P r o .1 , AI2 becomes the main process (command) and AI1
becomes the setpoint value.
Remote setpoint function works only with one of these two settings of par. 15 c.Pro..

User manual - ATR171 17
8 Controller functions
8.1 Modification of main and alarm setpoint value
Setpoint value can be modified from keyboard as follows:
1


Value on display 2 changes Increase or decrease main
setpoint value
2SET Visualizes alarm setpoint on display
1
3


Value on display 2 changes Increase or decrease alarm
setpoint value
8.2 Auto-tuning
Tuning procedure to calculate regulation parameters can be manual or automatic
and selected from parameter 24 tune .
8.3 Manual Tuning
Manual procedure allows user more flexibility on deciding when to update
regulation parameters of P.I.D. algorithm.
Press FNC key until display 1 visualizes writing tune and display 2 visualizes o FF .
Pressing

display 2 visualizes o n . Led TUN switches on and procedure starts.
8.4 Automatic Tuning
Automatic tuning starts when the controller is switched-on or when setpoint value
has been modified over 35%. To avoid overshooting, the threshold where controller
calculates new P.I.D. parameters is determinated by setpoint value minus “Set
Deviation Tune” value (see parameter 25 s.d.tu. ).
To interrupt Tuning keeping the P.I.D. values unchanged, press key FNC until
display 1 visualizes writing tune and display 2 visualizes o n . Pressing

, display 2
visualizes o FF , led TUN switchs off and procedure ends.
Setting once on parameter 24 tune autotuning procedure starts only once when
instrument is switched on: after calculating P.I.D. parameters parameter 24 tune
returns to di s . .
8.5 Automatic / manual regulation of % control output
This function allows to switch from automatic functioning to manual control of
output porcentage.
With parameter 71 au.ma., it is possible to select two modes.
1 The first selection (en . ): pressing key FNC display 1 visualizes writing p.---,
while display 2 visualizes auto. Press

to select manual mode man.. With

and

change output percentage. To return to automatic mode with the same
procedure, select auto on display 2: led MAN switches on and operation returns
to automatic mode.
2 The second selection (en.st.): enables the same functioning, but with two
important variants:

18 ATR171 - User manual
• In case of power failure or after a switch-off, at restart both the manual
functioning and the previously fixed output percentage value will be maintained.
• If during automatic functioning there is a sensor failure, controller will
automatically switch to manual mode while maintaining command output
percentage unchanged as generated by P.I.D. immediately before failure.
8.6 Soft-Start
At switch-on the controller follows a rising gradient expressed in units (ex. degree/
hour) to reach the setpoint.
The chosen rising gradient in Unit / Hour must be set on parameter 73 ri . G r . ; at next
switch-on the controller will execute Soft Start function.
Automatic and manual Tuning function cannot be enabled if Soft Start function is
active. In model ATR171-23ABC-T the Soft-Start function may be enabled only if
dip-switches are configured for serial communication (AI2 desabled).
8.7 Pre-programmed cycle
This function allows to program a simple working cycle on time basis, and can be
enabled setting p r. cy . on parameter 70 op.mo. : process reaches setpoint1 according
to gradient set on parameter 73 Grad., then it reaches setpoint2 with the maximum
power.
Once reached setpoint2, process is hold for the time set on parameter 75 m a . ti . .
At expiry, process reaches environmental temperature according to gradient set on
parameter 74 f a .G r. and then command output is disabled and controller visualizes
stop
.
It is possible to handle Start/Stop also by digital input
It is also possible to modify parameters of pre-programmed cycle from user menu
setting parameter 76 u.m.c.p. To start modification, press FNC.
Setpoint
Setpoint 2
Max.
power
Setpoint 1
Hold
Natural cooling
Time
Gradient
Cycle starts at each switch-on of the
controller.
In model ATR171-23ABC-T the pre-programmed cycle function may be enabled only
if dip-switches are configured for serial communication (AI2 desabled).

User manual - ATR171 19
8.8 Memory Card (optional)
Parameters and setpoint values can be easily copied from one controller to others
using the Memory Card. Two modes are available:
1 With the controller connected to the power supply. Insert Memory card when
the controller is off. At switch-on display 1 visualizes memo and display 2 visualizes
---- (only if correct values are stored on Memory). Pressing

display 2 visualizes
Lo a d. Confirm with FNC. Controller loads news values and restarts.
2 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 button. When writing the
parameters, led turns red and on completing the procedure it turns 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 controller1.
Enter configuration and change at least one parameter.
Exit configuration. Changes are saved automatically.
8.9 LATCH-ON function
For use with input p o t .1 (potentiometer 6 KΩ) and po t.2 (potentiometer 150 KΩ) and
with linear input (0..10 V, 0..40 mV, 0/4..20 mA), you can associate start value of the
scale (parameter 4 Lo .L.i .) to the minimum position of the sensor and value of the
scale end (parameter 7 u P.L.i .) to the maximum position of the sensor (parameter 8
La tc. configured as Std . ).
It is also possible to fix the point in which the controller will display 0 (however
keeping the scale range between Lo .L.i . and u P.L.i .)
using the “virtual zero” option by setting u.0st. or u.0in. in parameter 8 La tc..
If you set u.0in. the virtual zero will reset after each activation of the tool;
if you set u.0st. the virtual zero remains fixed once tuned.
To use the LATCH ON function configure as you wish the parameter La tc.2.
For the calibration procedure refer to the following table:
Press Display Do
1FNC Exit parameters configuration.
Display 2 visualizes writing La t c..
Place the sensor on minimum
operating value (corresponding
to Lo .L.i .).
2

Store value on minimum.
Display shows Lo W.
Place sensor on maximum
operating value (corresponding
to u P.L.i .).
1 If on activation the controller does not display memo it means no data have been saved on the
memory card, but it is possible to update values.
2 Calibration procedure starts by exiting configuration after parameter change.

20 ATR171 - User manual
Press Display Do
3

Store value on max.
Display shows Hi G h .
To exit standard proceeding press
FNC. For “virtual zero” setting,
place the sensor to zero point.
4SET
Set the virtual zero. Display shows
ui rt. . N.B.: If u.0in.
is selected,
the procedure must be executed
at each start
To exit procedure press FNC.
8.10 Timer function
To enable a timer with time value selectable by the user, configurate parameter 60
tMrf as follows:
• mm.ss: Timer with time base in seconds (mm.ss);
• HH. m m: Timer with time base in minutes (hh.mm).
To modify counting time duration, follow the steps below:
Press Display Do
1SET Press until tM r. is visualized on
display 1.
2


Value on display 2 changes Increase or decrease time value of
selected Timer.
To start or stop timer press PRGM or act via digital input if parameter 72 d G t.i . is
selected as t m r.i . .
During counting led RUN is on and display 2 visualizes decrementing time.
At expiry of Timer led RUN turns off and display 2 blinks showing time value until
a key is pressed.
8.11 Digital input functions (only for ATR171-11/12/14ABC)
Select chosen function on parameter 72 d G t.i . (par. 70 op.mo., must be set on Co n t.).
• st.st.: Start of Pre-programmed cycle (See par. 8.7);
• rn.n.o. o rn.n.c. : enables regulation;
• L.c.n.o. o L.c.n.c. : (Hold Function) allows to lock sensors reading when digital
input is active. It’s useful when measure oscillates on less significant values.
During hold phase display 2 blinks showing La t c..
• tune: enable / desables Tuning by digital input if par. 24 tune is set on Man..
• a.ma.i. o a.ma.c. : switch from automatic to manual mode if parameter 71 Au.Ma. is
set on en . or en.st..