Novus N20K48 User manual

MODULAR PROCESS CONTROLLER
N20K48
USER GUIDE V1.0x

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1SAFETY ALERTS ...........................................................................................................................................................................4
2INTRODUCTION .............................................................................................................................................................................5
2.1 CONTROLLER ........................................................................................................................................................................5
2.2 CLICKNGO MODULES ...........................................................................................................................................................6
2.3 DOCK.......................................................................................................................................................................................6
3INSTALLATION ..............................................................................................................................................................................8
3.1 ELECTRICAL INSTALLATION ................................................................................................................................................8
3.1.1 POWER SUPPLY CONNECTIONS.................................................................................................................................8
3.1.2 INPUT CONNECTIONS...................................................................................................................................................8
3.1.3 OUTPUT CONNECTIONS...............................................................................................................................................8
3.2 PANEL INSTALLATION...........................................................................................................................................................9
3.3 HOW TO ATTACH THE DOCK TO THE CONTROLLER .......................................................................................................9
3.4 HOW TO ATTACH A MODULE TO THE DOCK .....................................................................................................................9
3.5 DIMENSIONS ........................................................................................................................................................................10
3.5.1 DIMENSIONS WITH THE DOCK ..................................................................................................................................10
4OPERATION .................................................................................................................................................................................11
4.1 INITIAL OPERATION.............................................................................................................................................................11
4.1 DISPLAY INFORMATION..................................................................................................................................................11
4.2 KEYBOARD .......................................................................................................................................................................11
4.3 ACCESSING CYCLES AND CONFIGURATION PARAMETERS.....................................................................................12
4.4 HOW THE DEVICE WILL OPERATE AFTER YOU INSERT A CLICKNGO MODULE.....................................................13
4.2 FEATURES............................................................................................................................................................................13
4.2.1 ANALOG INPUT CONFIGURATION .............................................................................................................................13
4.2.2 OUTPUT CONFIGURATION .........................................................................................................................................13
4.2.3 ALARM CONFIGURATION ...........................................................................................................................................14
4.2.3.1 INPUT ERROR TYPES..........................................................................................................................................14
4.2.4 ALARM TIMER ..............................................................................................................................................................15
4.2.5 CONTROL MODES .......................................................................................................................................................15
4.2.6 PID CONTROL MODE AND ON/OFF CONTROL MODE .............................................................................................15
4.2.7 INITIAL ALARM BLOCK FUNCTION.............................................................................................................................15
4.2.8 SQUARE ROOT EXTRACTION FUNCTION.................................................................................................................15
4.2.9 SOFT START FUNCTION .............................................................................................................................................16
4.2.10 LOOP BREAK DETECTION (LBD) FUNCTION ............................................................................................................17
4.2.11 SAFE OUTPUT FUNCTION IN CASE OF SENSOR FAILURE ....................................................................................17
4.2.12 TIMERS .........................................................................................................................................................................17
4.3 PARAMETER DESCRIPTION...............................................................................................................................................19
4.3.1 OPERATION CYCLE.....................................................................................................................................................19
4.3.2 CONTROL CYCLE (CFG >> CtRL)..............................................................................................................................21
4.3.3 ALARM CYCLE (CFG >> ALM) .....................................................................................................................................23
4.3.4 INPUT CYCLE (CFG >>IN) ..........................................................................................................................................25
4.3.5 OUTPUT A CYCLE (CFG >> out.A)............................................................................................................................26
4.3.6 OUTPUT B CYCLE (CFG >> out.B)............................................................................................................................26
4.3.7 MODULES CYCLE (CFG >> md.1 or the module number according to its position in the dock) .................................27
4.3.8 PROGRAM CYCLE (CFG >> PROG).............................................................................................................................28
4.3.9 TIMER CYCLE (CFG >> tm).........................................................................................................................................30
4.3.10 CALIBRATION CYCLE (CFG >> CaLib).....................................................................................................................31
4.4 CONFIGURATION PROTECTION ........................................................................................................................................33
4.4.1 PASSWORD ..................................................................................................................................................................33
4.4.2 PASSWORD PROTECTION .........................................................................................................................................33
4.4.3 MASTER PASSWORD ..................................................................................................................................................33
4.5 COMMUNICATION INTERFACES........................................................................................................................................33
4.5.1 USB INTERFACE ..........................................................................................................................................................33

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4.5.2 BLUETOOTH INTERFACE............................................................................................................................................33
5RAMPS AND SOAKS PROGRAMS .............................................................................................................................................34
5.1 PROGRAM LINK ...................................................................................................................................................................34
5.2 EVENT ALARM......................................................................................................................................................................34
6PID PARAMETERS.......................................................................................................................................................................35
6.1 AUTO-TUNING......................................................................................................................................................................35
6.2 AUTO-ADAPTATIVE TUNING...............................................................................................................................................35
7CONFIGURATION SOFTWARE...................................................................................................................................................37
7.1 QUICKTUNE..........................................................................................................................................................................37
7.2 QUICKTUNE MOBILE ...........................................................................................................................................................37
7.3 CONFIGURING THE DEVICE WITH QUICKTUNE ..............................................................................................................37
7.3.1 BASIC ............................................................................................................................................................................37
7.3.2 FEATURES....................................................................................................................................................................38
7.3.2.1 ANALOG INPUT ....................................................................................................................................................38
7.3.2.2 DIGITAL OUTPUT .................................................................................................................................................39
7.3.2.3 CONTROL..............................................................................................................................................................39
7.3.2.4 TUNING .................................................................................................................................................................40
7.3.2.5 ALARMS ................................................................................................................................................................41
7.3.2.6 RnS PROGRAMS ..................................................................................................................................................43
7.3.2.7 TIMER....................................................................................................................................................................44
7.3.2.8 PROTECTION........................................................................................................................................................45
7.3.2.9 GENERAL..............................................................................................................................................................45
7.3.3 CYCLES.........................................................................................................................................................................46
7.3.3.1 OPERATION ..........................................................................................................................................................46
7.3.3.2 CONTROL..............................................................................................................................................................46
7.3.3.3 ALARMS ................................................................................................................................................................47
7.3.3.4 ANALOG INPUT ....................................................................................................................................................49
7.3.3.5 OUT.A ....................................................................................................................................................................50
7.3.3.6 OUT.B ....................................................................................................................................................................50
7.3.3.7 RnS PROGRAMS ..................................................................................................................................................51
7.3.3.8 TIMING...................................................................................................................................................................52
7.3.3.9 CALIBRATION .......................................................................................................................................................53
7.3.4 FAVORITE .....................................................................................................................................................................53
8MAINTENANCE ............................................................................................................................................................................54
8.1 CONTROLLER ISSUES ........................................................................................................................................................54
8.2 INPUT CALIBRATION ...........................................................................................................................................................54
9SPECIFICATIONS.........................................................................................................................................................................55
9.1 IDENTIFICATION ..................................................................................................................................................................55
9.2 CERTIFICATIONS.................................................................................................................................................................56
10 WARRANTY..............................................................................................................................................................................57

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1SAFETY ALERTS
The symbols below are used in the device and throughout this manual to draw the user’s attention to important information related to device safety
and use.
CAUTION
Read the manual fully before installing and
operating the device.
CAUTION OR HAZARD
Risk of electric shock.
ATTENTION
Material sensitive to static charge. Check
precautions before handling.
All safety recommendations appearing in this manual must be followed to ensure personal safety and prevent damage to the instrument or system.
If the instrument is used in a manner other than that specified in this manual, the device’s safety protections may not be effective.

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2INTRODUCTION
N20K48 Modular Controller brings a new concept of modularity to panel instrumentation.
Traditionally, manufacturers of electronic instrumentation have a wide range of controllers. Each model presents different functionalities, designed to
meet the specific requirements of each installation. In the modularity concept applied to N20K48 Modular Controller, this is provided in a single
controller, which already has a minimum set of features and a basic configuration that can meet several applications.
In addition, you can attach ClickNGo electronic modules, which provide resources such as analog inputs and outputs, digital inputs and outputs, and
RS485 communication to the device. The attached modules will be automatically recognized by the controller, which will display the parameters to
set the available resources. All modules come with the terminals for electrical connections.
You must use the dock accessory (plastic adapter) to attach the modules to the controller in an easy and quick way. No screws are required.
N20K48 Modular Controller, dock, and ClickNGo modules are separate products and must be ordered individually.
The image below shows the elements available in the modularity model adopted by N20K48 Modular Controller:
N20K48 Modular Controller
2.1 CONTROLLER
N20K48 Modular Controller is a complete and autonomous device. It can control several processes. You can expand its capabilities by attaching
ClickNGo electronic modules, which allow it to meet more complex applications.
The device has the following features:
•1 Universal analog input channel (INPUT)
•1 Voltage pulse output channel (OUT.A)
•1 Relay output channel (OUT.B)
•Power supply circuit (POWER)
•HMI with LCD display and keyboard
•Main CPU
•1 USB port
Device overview
The device has 2 models, differing in relation to the power supply voltage:
•100~240 Vac/dc power supply model
•24 Vdc/ac power supply model
You can insert up to 8 ClickNGo modules in your N20K48 Modular Controller. The added module will be automatically identified by the controller.
The parameters to configure each module will be displayed in the controller configuration cycles (see MODULES CYCLE section).

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2.2 CLICKNGO MODULES
The ClickNGo electronic modules extend the N20K48 Modular Controller capabilities. They are electrically powered by the controller and have their
own connectors. The modules have 3 sizes:
Sizes
Currently, the following modules are available:
•ClickNGo CG-2R5 Module: Provides 2 channels of Relay Output. Size 2.
•ClickNGo CG-3DI Module: Provides 3 channels of Digital Inputs. Size 1.
•ClickNGo CG-3DO Module: Provides 3 channels of Voltage Pulse Digital Output. Size 1.
•ClickNGo CG-485 Module: Provides 1 RS485 Digital Communication channel. Size 1.
•ClickNGo CG-AO Module: Provides 1 Analog Output channel. Size 1.
You can get information about each module on NOVUS website.
2.3 DOCK
Once attached to the back of the N20K48 Modular Controller, the dock allows you to attach electronic modules to the device (see CLICKNGO
MODULES section). It connects electrically to the controller and conducts the electrical control and power supply signals to the electronic modules.
Accessory dock
The dock is designed to hold up to 8 ClickNGo modules. Size 1 modules use 1 slot in the dock and a controller with an attached dock can hold up to
8 modules of that size. Size 2 modules use 2 slots in the dock and a controller with an attached dock can hold up to 4 modules of that size. Size 2
modules can be used in the following positions:
•1 and 2
•3 and 4
•5 and 6
•7 and 8
You cannot install size 2 ClickNGo modules in pairs of slots 2 and 3 / 6 and 7.
Modules of size 4 occupy 4 slots in the dock. Thus, the N20K48 Modular Controller supports only 2 ClickNGo modules of that size.
Dock positions

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You can combine modules of different sizes if you observe the possible positions for the size 2 modules, as shown in the examples below:
Modules attached to the dock

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3INSTALLATION
3.1 ELECTRICAL INSTALLATION
The figures below reproduce the labels placed on the top of the device and show the disposition of the N20K48 Modular Controller resources:
POWER SUPPLY 100~240 VAC/DC POWER SUPPLY 24 VDC/AC
Electrical connections labels
INSTALLATION RECOMENDATIONS
•Electronic and analog signal conductors should run through the plant separately from the output and supply conductors. If possible, in grounded
conduits.
•The power supply for electronic instruments must come from a network suitable for instrumentation.
•The use of RC FILTERS (noise suppressors) in contactor coils, solenoids, etc. is recommended.
•In control applications, you must consider what can happen when any part of the system fails. The built-in safety features of the device do not
guarantee total protection.
•You must detach the terminal blocks from the device to make the electrical connections. Before you connect them, make sure you have made
the correct connections.
3.1.1 POWER SUPPLY CONNECTIONS
100~240 Vac/dc Model 24 Vdc/ac Model
3.1.2 INPUT CONNECTIONS
•Thermocouples: Figure 10 shows the connection mode for thermocouple sensors. If you need to extend the thermocouple wires, use
appropriate compensating cables.
•50 mV, 5 V and 10 V: Figure 11 shows the connection mode for 0-50 mV, 5 V and 10 V.
•RTD (Pt100): Figure 12 shows the connection mode for the 3-wire Pt100. You should use conductors of the same gauge and length to
compensate for cable length. For 4-wire Pt100, you must leave one conductor disconnected at the controller. For 2-wire Pt100, use short-circuited
terminals 1 and 2.
•0-20 mA and 4-20 mA: Figure 13 shows the connection mode for current signals.
Thermocouple
connection
50 mV, 5 V and 10 V
connections
3-wire Pt100 connections 0-20 mA and 4-20 mA
connections
3.1.3 OUTPUT CONNECTIONS
Output A
connection (Voltage Pulse)
Output B
connection (Relay)

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3.2 PANEL INSTALLATION
N20K48 Modular Controller is suitable for panel installation. You should install it according to the steps below:
•Make a cut-out in the panel as specified in the technical specifications table (see SPECIFICATIONS chapter).
•Remove the controller fixing clips.
•Insert the controller in the panel.
•Replace the fixing clips on the controller, attaching them as shown in the figure below:
Fixing clips
3.3 HOW TO ATTACH THE DOCK TO THE CONTROLLER
You must attach the dock to the back of the N20K48 Modular Controller, as shown in the figure below:
Attaching the dock to the controller
To attach it to the device, simply press it down until you hear it click into place. To remove it, we recommend using a screwdriver, which can help you
release the side locks without damaging the product.
3.4 HOW TO ATTACH A MODULE TO THE DOCK
Once you have attached the dock to your device (as shown in the DOCK section of this chapter), you can add one or more ClickNGo modules to it.
To do so, simply insert the module into the dock and press it down until you hear it click into place. If the module is not positioned correctly, it is either
not plugged in properly or it has been plugged in at an incorrect position.
You cannot add modules of sizes 2 and 4 between inputs 2 and 3 and inputs 6 and 7. You can use modules of different sizes up to the limit of the
dock physical space.
Before inserting or removing a ClickNGo module, make sure the device has been turned off.

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3.5 DIMENSIONS
N20K48 Modular Controller has the following dimensions:
Dimensions
3.5.1 DIMENSIONS WITH THE DOCK
After you connect the dock to the back of the device, N20K48 Modular Controller will have the following dimensions:
Device dimensions with the dock
The dock has the following dimensions:
Device dimensions without the dock

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4OPERATION
4.1 INITIAL OPERATION
After you have completed the electrical installation (see INSTALLATION chapter) and turned on the device, the N20K48 Modular Controller display
will show the software version number for the first few seconds. After that, it will display the Indication Screen. It shows the PV (Process Variable)
and SP (Setpoint) values and flags that inform specific conditions of the controller and monitored process.
You can see the controller front panel and basic display information in the figure below:
Front panel
4.1 DISPLAY INFORMATION
The N20K48 Modular Controller front panel elements are listed below:
•Main Display: The Indication screen, in white, displays the PV (Process Variable) value. When in configuration, it shows the identifying symbols
(mnemonics) of the parameters that must be set.
•SP/Parameters Display: The Indication screen, in green, displays the SP (Setpoint) value. When in configuration, it shows the values set for the
various parameters.
•PROG Flag: Indicates that a program is running.
•MAN Flag: Indicates that the controller is in Manual Control mode (CTR =MAN).
•STOP Flag: Indicates that the control is disabled (RUN =No). That is, the device is not in operation.
•RUN Flag: Indicates that the control is enabled (RUN =YES). That is, the device it is in operation.
•OUT1 and OUT2 Flags: Indicates the condition of outputs A and B.
•TUNE Flag: Indicates that an Auto-tuning process is in progress.
•A1, A2, A3 and A4 Flags: Indicates that there are alarm events.
•°C Flag: Indicates that the temperature measurement was set in Celsius.
•°F Flag: Indicates that the temperature measurement was set in Fahrenheit.
•Flag: Indicates that configuration protection is enabled.
•T1 and T2 Flags: Indicates that there is a timer configured.
•Bluetooth Flag: Indicates that the controller is connected to the QuickTune Mobile application.
•Rx/Tx Flags: Flashes whenever the controller exchanges data with the communication network.
4.2 KEYBOARD
The N20K48 Modular Controller front panel has the following keys:
•Key: Key used to advance the parameters and parameter cycles.
•and Keys: Keys used to increment and decrement values. Used to change parameter values and/or condition.
•Key: Key used to regress the parameters during setup and, when available, to perform special functions.

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4.3 ACCESSING CYCLES AND CONFIGURATION PARAMETERS
N20K48 Modular Controller has configuration parameters, which have been gathered into affinity groups, called Cycles. As shown in the figure
below, there is the Operation Cycle and the Configuration Cycles, composed of Control, Alarms, Input, Output A, Output B, Modules (1 to 8),
Programs, Timer, and Calibration:
N20K48 Cycles
To navigate between cycles, as shown in the figure above, you must press the key for three seconds. Once in the desired cycle, simply click the
key until you find the parameter that you want to configure. You must use the or keys to change the condition/value of the desired
parameter.
In either case, the key allows you to go back.
To view the parameters of each cycle, please refer to the following figure:
Cycles and parameters groups

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The figure above shows the controller parameters, which does not mean that all of them will always be displayed. Some settings are mutually
exclusive, and some parameters are only displayed during certain situations. If the N20K48 Modular Controller does not display the desired
parameter, you should observe the instructions in the FEATURES and PARAMETER DESCRIPTION sections.
According to the configuration protection configured, the controller will ask for the protection password whenever there is an attempt to enter the
parameter cycles. For more information, see CONFIGURATION PROTECTION section, which describes this functionality.
The controller settings are stored in protected electronic memory. This information will not be erased if there is a power outage, for example. The
settings made in each parameter will be saved when you move to the next parameter or step back to the previous parameter. The value of the SP
parameter will automatically be saved (with or without change) every 25 seconds.
4.4 HOW THE DEVICE WILL OPERATE AFTER YOU INSERT A CLICKNGO MODULE
Once you have inserted the dock into the device, the ClickNGo module will be recognized when the device is powered up. You can use the instructions
above to navigate through the parameter cycles and access the settings of the added ClickNGo module.
The settings of the added module will be available according to its position in the dock. A ClickNGo module inserted in position 1, for example, will
be viewable within the Configuration Cycle (CFG), in the Module 1 Cycle (Cfg >> md.1).
Once a module is removed from the dock, it will no longer be recognized by the device and the settings made will be lost.
You can see the specific information of each module in its respective datasheet, available on the device web page.
Before inserting or removing a ClickNGo module to the dock, please verify that the device is turned off.
4.2 FEATURES
This section introduces the N20K48 Modular Controller features. To learn more about each parameter, see PARAMETER DESCRIPTION section.
4.2.1 ANALOG INPUT CONFIGURATION
This is the first configuration to be set in the N20K48 Modular Controller. You can select the input type in the tYPE parameter (CFG >> IN >>
TYPE) and according to the options available below:
TYPE CODE MEASUREMENT RANGE
J
Tc j
Range: -110 to 950 °C (-166 to 1742 °F)
K
Tc k
Range: -150 to 1370 °C (-238 to 2498 °F)
T
Tc t
Range: -160 to 400 °C (-256 to 752 °F)
N
Tc N
Range: -270 to 1300 °C (-454 to 2372 °F)
R
Tc R
Range: -50 to 1760 °C (-58 to 3200 °F)
S
Tc s
Range: -50 to 1760 °C (-58 to 3200 °F)
B
Tc b
Range: 400 to 1800 °C (752 to 3272 °F)
E
Tc e
Range: -90 to 730 °C (-130 to 1346 °F)
Pt100
Pt
Range: -200 to 850 °C (-328 to 1562 °F)
0-20 mA
L0.20
Analog Linear Signal
Programmable indication from -1999 to 9999.
4-20 mA
L4.20
0–50 mV
L0.50
0-5 Vcc
L0.5
0-10 Vcc
L0.10
Table 1 –Input types
All input types are factory calibrated.
4.2.2 OUTPUT CONFIGURATION
N20K48 Modular Controller has 2 native output channels: out.A and out.B (CFG >> out.A or CFG >> out.b), which accept the following
configurations:
SCREEN FUNCTION ACTION
oFF
No function
The output configured with this option will not be used by the controller.
MV1
Control Output 1 The output will act as control output 1.
MV2
Control Output 2
The output will act as control output 2.
A1
Alarm Output 1 The output will act as alarm output 1.
A2
Alarm Output 2
The output will act as alarm output 2.
A3
Alarm Output 3 The output will act as alarm output 3.
A4
Alarm Output 4 The output will act as alarm output 4.
T1
Timer 1
The output will act as timer output 1.
T2
Timer 1 The output will act as alarm output 2.

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M.Coil
Modbus-Coil The output will act as a Modbus-Coil command for connection to the Modbus-TCP protocol.
Table 2 –Function types for analog outputs
You can add more outputs to the device by adding more modules (see CLICKNGO MODULES section).
4.2.3 ALARM CONFIGURATION
N20K48 Modular Controller has 4 independent alarms (CFG >> ALM >> Fu.A1, Fu.A2, Fu.A3 or Fu.A4), which can be configured to operate
with the following functions:
SCREEN FUNCTION ACTION
off
Disabled The alarm is off.
Lo
Minimum Value Alarm
(Low)
SPAn
PV
Hi
Maximum Value Alarm
(High)
SPAn
PV
DiF
Differential Value Alarm
(Differential)
SV
PV
SV + SPAn
SV -SPAn
Positive SPAn
SV
PV
SV -SPAn
SV + SPAn
Negative SPAn
diF.L
Differential Minimum Value
Alarm
(Differential Low)
Positive SPAn
SV
PV
SV -SPAn
Negative SPAn
SV
PV
SV -SPAn
DiF.H
Differential Maximum Value
Alarm
(Differential High)
Positive SPAn
SV
PV
SV + SPAn
Negative SPAn
i.Err
Input Error
(input Error)
Function to detect input errors, although not all admitted input error can be identified by this function.
See section INPUT ERROR TYPES.
This option and the Initial Alarm Blockfunction are mutually exclusive. You cannot set an initial block
if you set up an alarm as Open Sensor Alarm.
rs
Event Alarm
(ramp and Soak)
The alarm must be triggered in specific segments of the Ramps and Soaks programs to be created.
See RAMPS AND SOAKS PROGRAMS chapter.
End.t
End of Soak
(End of Level)
End of Ramp to Soak program time. Allows the controller to go into alarm upon reaching the set Ramp
to Soak time.
Lbd
Loop Break Detection
Allows you to set the selected channel as output for the Loop Break Detector function.
Table 3 –Alarm functions
In the above examples, the term SPAn refers to the following Alarm Setpoints: SP.A1, SP.A2, SP.A3 and SP.A4.
Alarms configured with Hi, Dif and Dif.H functions also trigger the related output when the controller identifies a sensor failure. A relay output, for
example, configured to behave as a Maximum Alarm (Hi), will act when the SPAL value is exceeded and when the sensor connected to the controller
input breaks.
If no control output is used, both outputs can be set as alarms (see OUTPUT CONFIGURATION section).
4.2.3.1 INPUT ERROR TYPES
The Input Error function cannot identify all types of errors. A short-circuit in the 0-5 V input signal, for example, will be identified by the device as a
0 V signal applied to the input and thus will be recognized as a valid value. In such situations, you should analyze each case.
The table below shows the behavior of the controller when facing possible failures allowed for the various types of input:
INPUT TYPE
PROBLEM
PROBLEM DESCRIPTION
Thermocouple
Open or broken
thermocouple
The error will be recognized by the Input Error function. In its display, the device
will show the
UUUU
message.
Short Circuit
The error will
not
be recognized by the
Input Error
function. In its display, the
device will show the temperature value of its rear terminals (Cold Junction
temperature).
Pt100
Broken wires The error will be recognized by the Input Error function. In its display, the device
will show the ---- message.
Short Circuit
The error will be recognized by the Input Error function. In its display, the device
will show the
UUUU
message.
0-20 mA Broken or short-circuited
wiring
The error will not be recognized by the Input Error function. In its display, the
equipment will show the lower value of the configured range.
4-20 mA Broken or short-circuited
wiring
The error will be recognized by the
Input Error
function. In its display, the device
will show the ---- message.
SV
PV
SV + SPAn

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INPUT TYPE
PROBLEM
PROBLEM DESCRIPTION
0-5 V
0-10 V
Broken or short-circuited
wiring
The error will not be recognized by the Input Error function. In its display, the
equipment will show the lower value of the configured range.
0-50 mV
Broken wires The error will be recognized by the Input Error function. In its display, the device
will show the ---- message.
Short Circuit
The error will not be recognized by the Input Error function. In its display, the
equipment will show the lower value of the configured range.
Table 4 –Input error types
4.2.4 ALARM TIMER
The alarm can be triggered in the following ways:
•Defined time alarm trigger
•Delayed alarm trigger
•Intermittent alarm trigger
The table below shows the behavior of the alarm outputs with the trigger variations defined by the time ranges T1 and T2, available in parameters
t1A1, At2a1, t1A2, t2A2, t1A3, t2A3, t1A4 and t2A4 (CFG >> ALM >> t1A1 or the desired timer parameter T1 or T2).
OPERATION T 1 T 2 ACTION
Normal operation 0 0
Alarm Occurrence
Alarm
output
Defined time alarm trigger 1 to 6500 s 0
Alarm Occurrence
Alarm
output
t1
Delayed alarm trigger 0 1 to 6500 s
Alarm ocurrence
Alarm
output
t2
Intermittent alarm trigger 1 to 6500 s 1 to 6500 s
Alarm occurrence
Alarm
output
t1
t2
t1
Table 5 –Alarm timer functions
The alarm indicators light whenever an alarm condition occurs, regardless of the alarm output status (see DISPLAY INFORMATION section).
4.2.5 CONTROL MODES
N20K48 Modular Controller has 2 control modes: Automatic mode or Manual mode, as configured in the Ctr parameter of the Operation Cycle (see
OPERATION CYCLE section).
•In Automatic mode (Ctr >> auto), the controller sets the MV value to be applied to the process. It is based on the parameters set (SP, PID,
etc.).
•In Manual mode (Ctr >> MAN), you need to set this value.
4.2.6 PID CONTROL MODE AND ON/OFF CONTROL MODE
The Automatic control mode (Ctr >> auto) has 2 control strategies: PID control and ON/OFF control.
•In PID control mode, the PID control action is based on a control algorithm that acts on the deviation of the PV value from the SP value and
based on the set Pb, Ir and Dt parameters. To configure this control mode, you must set the Pb parameter to a value other than 0.
•In ON/OFF control mode, the controller must act with 0 % or 100 % power when the PV deviates from the SP value. To configure this control
mode, you must set the Pb parameter to a value other than 0(Once this is done, the parameters Ir and Dt will not be displayed).
For more information about the parameters Pb, Ir and Dt, see CONTROL CYCLE section.
4.2.7 INITIAL ALARM BLOCK FUNCTION
The Initial Alarm Block function (CFG >> ALM >> bL.A1,bL.A2,bL.A3 or bL.A4) prevents the alarm from being triggered during an alarm
condition when the controller is on or after the operation transition (RUN >> no → YES). The alarm will be enabled after the process goes through a
non-alarm condition.
The initial block is useful when one of the alarms is set as a minimum value alarm (CFG >> ALM >> Fu.A1 or the desired alarm number >> Lo), for
example. This may cause the alarm to be triggered during process startup (a behavior that is often undesired).
The initial block is not valid for the Open Sensor Alarm function (For more information about this and other types of alarms, see table in ALARM
CONFIGURATION section).
4.2.8 SQUARE ROOT EXTRACTION FUNCTION
Once this function is enabled (CFG >>IN >> SQRT), the controller will display the value corresponding to the square root of the applied input signal.
Available only for the following analog linear signal input: 0-20 mA, 4-20 mA, 0-50 mV, 0-5 V and 0-10 V (see ANALOG INPUT CONFIGURATION
section).

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4.2.9 SOFT START FUNCTION
The Soft Start function (CFG >> CTRL >> SF.St) prevents abrupt variations in the power delivered to the load by the controller control output. A
time interval (in seconds) limits the rise in the percentage of power delivered to the load. It will only reach 100 % of the power at the end of this
interval.
This function is normally used in processes that require a slow start, where applying 100% power to the load instantaneously can damage parts of
the process.
Available only when in PID control mode (see PID CONTROL MODE AND ON/OFF CONTROL MODE section).

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4.2.10 LOOP BREAK DETECTION (LBD) FUNCTION
The Loop Break Detection function (CFG >> ALM >> Lbd.t) allows you to set a maximum time interval (in minutes) for the PV to react to the control
output command. If the PV does not react minimally and adequately within this interval, N20K48 Modular Controller signals the occurrence of an
LBD event on its display (i.e., problems in the control loop).
You can also address the LBD event to one of the controller alarms. To do this, simply set the desired alarm with the LDB function. When the
configured event occurs (CFG >> ALM >> Fu.A1,Fu.A2,Fu.A3 or Fu.A4 >> Lbd), the respective output will be activated (see ALARM
CONFIGURATION section).
This function is disabled if configured with 0 (zero).
This function allows the device to detect problems in the installation, such as a defective actuator, a failure in the load power supply, or an open
sensor. Even in these cases, the Lbd function will signal the occurrence of an LBD event after the time interval you have set has elapsed.
4.2.11 SAFE OUTPUT FUNCTION IN CASE OF SENSOR FAILURE
With this function, the control output will enter a safe condition for the process whenever there is an error at the input (sensor). When identifying a
failure, the controller will apply to MV the percentage value that was set in the IE.ou parameter (CFG >> CtRL).
If the IE.ou parameter has been set to 0.0 (zero), this function will be disabled, and the control output will be switched off whenever occurs a failure
at the input.
4.2.12 TIMERS
The controller has 2 timers (T1 and T2), which operate independently of the process control. The parameters that define the operating mode of these
timers are listed in the Timer Cycle (CFG >> TM). Any of the controller outputs can be linked to the timers.
Time counting always starts from T1. The device starts counting from T2 at the end of this count.
In parameter T.tb you can define whether the time base will be in HH:MM (hours and minutes) or in MM:SS (minutes and seconds).
The parameter T.RUN allows the process control to be disabled at the end of the timers.
The flags T1 and T2 are displayed on the front of the controller and refer to the status of the T1 and T2 timers (see DISPLAY INFORMATION section).
T1 TIMER
T1 is the main timer. You can define its operation by setting 2 parameters:
t.str Timer trigger mode
t.end Output behavior during timer process
If you set parameter T1.e, T1 parameter will be displayed in the Operation Cycle.
T1 TIMER TRIGGER
You can set Timer 1 in parameter t.str:
T.str
Timer Start
Allows you to set T1 timer start/stop mode.
oFF
Timers are off (T1 and T2). The parameters related to the timer will not be displayed.
SP
Starts counting T1 when the PV value reaches the SP value defined for the process.
F
Starts counting T1 by pressing the key.
Once the timer has started, you can interrupt it by briefly pressing the key (1 s). Another short press will resume
the timer. A long press of the key (3 s) immediately ends the timer cycle in progress.
RUN
Starts counting when control is enabled (
RUN
>>
YES
).
Di
Triggers with digital input.
The control must be enabled (RUN= YES) before you can trigger the timer by pressing the key.
OUTPUT T1 BEHAVIOR DURING T1
The output T1 can behave in 2 ways during T1 timer:
T.end
Timer End
T1 output behavior at the end of T1 timer.
on
T1 output is on (
on
) at the end of T1. At the start of T1 timer, the T1 output remains off. At the end of the timer, the T1
output is on and remains in this condition until a new cycle starts.
The T1 flag flashes during T1 timer. It switches on permanently after T1 has elapsed, indicating that the output is still
on.
off
T1 output is off (
off
) at the end of T1 interval.
In this mode, T1 is on when T1 timer starts, and is off at the end of T1 timer.
The T1 flag flashes during T1 timer and definitively switches off at the end of T1.
On the controller front panel, the T1 flag indicates the timer status.
In both cases, the respective flag (T1 or T2) will flash rapidly whenever the timer is interrupted by pressing the key .

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PROCESS CONTROL BEHAVIOR AT TIMING END
During T1 and T2 intervals, the process control acts as it has been configured. However, at the end of the T1 + T2 interval, you can set the controller
to disable process control (RUN >> No). In Cycle Timer (CFG >> tm), the parameter T.RUN allows you to determine the desired setting:
T.RUN
Timer Run
Allows you to define the behavior of the process control at the end of T1 + T2.
on
Temperature control continues to operate.
off
Disables control at the end of the timer (
RUN
=
No
).
T2 TIMER
T2 is the secondary timer. It always starts at the end of T1. It can also be linked to any output available in the controller. The linked output turns on
at the beginning of T2 and turns off at the end of T2.
The T2 flag indicates the T2 timer condition (see DISPLAY INFORMATION section):
•T2 in progress = The T2 flag is flashing.
•T2 not started or already ended = The T2 flag is off.
TIMING DIRECTION
The time counting of the 2 timers (T1 and T2) can occur in forward or backward mode. In the forward mode (uP), counting starts from 0 and goes up
to the programmed time interval value (T1, T2). In backward mode (dn), counting starts at the value of the set time interval and counts down to 0.
The timing direction is set in parameter t.dir:
T.dir
Timer Direction
T1 timing count direction.
up
Forward mode, starting at 0.
Dn
Backward mode.

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4.3 PARAMETER DESCRIPTION
N20K48 Modular Controller has cycles, composed of configuration parameters that have been grouped into affinity groups. The tables below present
detailed information about each device cycle.
4.3.1 OPERATION CYCLE
This is the Operation Cycle:
Operation Cycle
The Operation Cycle is also called Indication Screen and has the following parameters:
PV Indication
(White display)
SP Indication
(Green display)
PV and SP Indication Screen. The upper display indicates the current value of PV. The lower display indicates the value of the
adopted control SP.
Ctr
Control
Control Mode:
auto
– Automatic control mode
MaN
– Manual control mode
Bumpless transfer between automatic and manual.
You must set the parameter Enable Control Function (
Ctr.E
) of the Calibration Cycle (
CALIB
) to
yes
or
no
to display this
parameter in the Operation Cycle.
PV Indication
(White display)
MV Indication
(Green Display)
MV Value. The upper display indicates the value of PV. The lower display indicates the percentage value applied to the control
output (MV).
In Automatic control mode, you can only view the MV value. In Manual control mode, you can change the MV value. See
CONTROL MODES section.
To distinguish this screen from the SP screen, the MV value flashes constantly.
t1
Timer 1
Timer 1. Allows you to set a value for timer 1.
You must set the parameter Enable Timer 1 (
t1.E
) of the Timer Cycle (
tm
) to
yes
or
no
to display this parameter in the Operation
Cycle.

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PRG
Program
Program execution. Allows you to select the Ramps and Soaks program to be executed.
NONE
– Do not execute any program
1to 20 – Number of the program to be executed
With the outputs enabled (
RUN
=
YES
), the selected program will be executed immediately.
You must set the parameter Enable Program Function (
PRG.E
) of the Timer Cycle (
tm
) to
yes
or
no
to display this parameter in
the Operation Cycle.
Sp.a1
Sp.a2
Sp.a3
Sp.a4
Setpoint Alarm
Alarm SP. Allows you to define the actuation point for alarms programmed with
Lo
or
Hi
functions.
This parameter defines the deviation of alarms programmed with Differential type functions.
This parameter is not used for other alarm functions.
You must set the parameter for the desired Alarm Setpoint (
E.SPA1
,
E.SPA2
,
E.SPA3
or
E.SPA4
) of the Alarm Cycle (
ALM
) to
yes
or
no
to display the Alarm Setpoint parameters in the Operation Cycle.
p.seg
Program
Segment
Indicative screen only. When a program is running, displays the number of the running segment of this same program.
t.seg
Time Segment
Indicative screen only. When a program is running, displays the time left to finish the running segment. Displayed in the time unit
adopted in the Programs Time base parameter (
CFG
>>
PROG
>>
Pr.tb
).
RUN
Allows you to enable control outputs and alarms.
YES
– Enabled
No
– Disabled
You must set the parameter Enable Function RUN (
RUN.E
) of the Calibration Cycle (
CALIB
) to
yes
or
no
to display this parameter
in the Operation Cycle.
Table 6 –Operation cycle