scigiene NV-N20K48 User manual

MODULAR PROCESS CONTROLLER
Part #: NV-N20K48
USER GUIDE

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1 SAFETY ALERTS....................................................................................................................................... 4
2 INTRODUCTION......................................................................................................................................... 5
2.1 CONTROLLER..................................................................................................................................... 5
2.2 CLICKNGO MODULES........................................................................................................................ 6
2.3 DOCK ................................................................................................................................................... 6
3 INSTALLATION.......................................................................................................................................... 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
4 OPERATION............................................................................................................................................. 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 ( CF G >> C t RL ) ............................................................................................... 21
4.3.3 ALARM CYCLE (CFG >> ALM) ................................................................................................... 23
4.3.4 INPUT CYCLE (CFG >>IN).......................................................................................................... 25
4.3.5 OUTPUT A CYCLE ( CF G >> ou t. 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
4.5.2 BLUETOOTH INTERFACE.......................................................................................................... 33

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5 RAMPS AND SOAKS PROGRAMS ........................................................................................................ 34
5.1 PROGRAM LINK................................................................................................................................ 34
5.2 EVENT ALARM .................................................................................................................................. 34
6 PID PARAMETERS.................................................................................................................................. 35
6.1 AUTO-TUNING................................................................................................................................... 35
6.2 AUTO-ADAPTATIVE TUNING........................................................................................................... 35
7 CONFIGURATION 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
8 MAINTENANCE........................................................................................................................................ 54
8.1 CONTROLLER ISSUES..................................................................................................................... 54
8.2 INPUT CALIBRATION........................................................................................................................ 54
9 SPECIFICATIONS.................................................................................................................................... 55
9.1 IDENTIFICATION............................................................................................................................... 55
9.2 CERTIFICATIONS.............................................................................................................................. 56
10 WARRANTY.......................................................................................................................................... 57

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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.
1 SAFETY ALERTS

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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, designedto 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 severalapplications.
Inaddition, 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).
2 INTRODUCTION

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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:
Currently, the following modules are
available:
Sizes
•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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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
INSTALLATION RECOMENDATIONS
Electrical connections labels
•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. isrecommended.
•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.
Thermocoupl
e connection
50 mV, 5 V and
10 Vconnections 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)
3 INSTALLATION

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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 SPECIFICATIONSchapter).
•Remove the controller fixing clips.
•Insert the controller in the panel.
•Replace the fixing clips on the controller, attaching them as shown in the figurebelow:
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:
The dock has the following
dimensions:
Device dimensions with the dock
Device dimensions without the dock

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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 inoperation.
•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 inprogress.
•A1, A2, A3 and A4 Flags: Indicates that there are alarmevents.
•°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 specialfunctions.
4 OPERATION

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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.
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 t YPE parameter ( CF G >> 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
All input types are factory calibrated. Table 1 –Input types
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:
SCREE
N
FUNCTION
ACTIO
N
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
Timer1
The output will act as timer output 1.
T2
Timer1
The output will act as alarm output 2.
Before inserting or removing a ClickNGo module to the dock, please verify that the device is turned
off.

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M. C oil
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
N20K48Modular Controller has4independentalarms(CFG>>ALM>>Fu.A1,Fu.A2,Fu.A3orFu.A4),whichcanbeconfiguredtooperate
with the following functions:
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 configuredwith 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
connectedtothecontroller 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.

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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).
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 thisvalue.
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 oftenundesired).
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
TheLoop BreakDetectionfunction(CFG>>ALM>>Lbd.t)allowsyouto set amaximumtimeinterval(in minutes)forthePVtoreact 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 beenabled (RUN=YES) before you can trigger the timer by pressingthe 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 cyclestarts.
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
Thetimecounting of the 2 timers (T1 and T2) can occur inforward orbackward mode. Inthe forward mode ( uP ),counting starts from 0
andgoesup to the programmed timeintervalvalue(T1, T2).Inbackward mode( dn ),counting starts atthevalueoftheset timeinterval
andcounts down to0. 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 configurationparameters that havebeen grouped into affinity groups.The tables
belowpresent 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)
PV and SP Indication Screen. The upper display indicates the current value of PV. The lower display
indicates the value of the
SP
Indication
(Green
display)
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 ( t 1. E ) of the Timer Cycle ( tm ) to y es 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
1 to 20 –Number of the program to be executed
With the outputs enabled (RUN = YES), the selected program will be executed immediately.
YoumustsettheparameterEnableProgramFunction( PRG.E )oftheTimerCycle( tm )to yes or no to
displaythisparameterin the Operation Cycle.
Sp.a1
Alarm SP. Allows you to define the actuation point for alarms programmed with Lo or Hi functions.
Sp.a2
This parameter defines the deviation of alarms programmed with Differential type functions.
Sp.a3
This parameter is not used for other alarm functions.
Sp.a4
Setpoint
Alarm
Youmust set the parameterfor thedesiredAlarm Setpoint (E.SPA1, E.SPA2, E.SPA3or E.SPA4) of theAlarm
Cycle(ALM) to
yes or no to display the Alarm Setpoint parameters in the Operation Cycle.
p.seg
Progra
m
Segme
nt
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
YoumustsettheparameterEnableFunctionRUN(RUN.E)oftheCalibrationCycle(CALIB)toyesornoto
displaythisparameter in the OperationCycle.
Table 6 –Operation cycle