ALTUS Nexto NX3004 User manual

User Manual
Nexto Series CPUs
NX3004, NX3005, NX3010,
NX3020, NX3030
Rev. K 11/2017
Doc. Code.: MU214605

General Supply Conditions
i
No part of this document may be copied or reproduced in any form without the prior written consent
of Altus Sistemas de Automação S.A. who reserves the right to carry out alterations without prior
advice.
According to current legislation in Brazil, the Consumer Defense Code, we are giving the following
information to clients who use our products, regarding personal safety and premises.
The industrial automation equipment, manufactured by Altus, is strong and reliable due to the
stringent quality control it is subjected to. However, any electronic industrial control equipment
(programmable controllers, numerical commands, etc.) can damage machines or processes controlled
by them when there are defective components and/or when a programming or installation error
occurs. This can even put human lives at risk.
The user should consider the possible consequences of the defects and should provide additional
external installations for safety reasons. This concern is higher when in initial commissioning and
testing.
The equipment manufactured by Altus does not directly expose the environment to hazards, since
they do not issue any kind of pollutant during their use. However, concerning the disposal of
equipment, it is important to point out that built-in electronics may contain materials which are
harmful to nature when improperly discarded. Therefore, it is recommended that whenever
discarding this type of product, it should be forwarded to recycling plants, which guarantee proper
waste management.
It is essential to read and understand the product documentation, such as manuals and technical
characteristics before its installation or use.
The examples and figures presented in this document are solely for illustrative purposes. Due to
possible upgrades and improvements that the products may present, Altus assumes no responsibility
for the use of these examples and figures in real applications. They should only be used to assist user
trainings and improve experience with the products and their features.
Altus warrants its equipment as described in General Conditions of Supply, attached to the
commercial proposals.
Altus guarantees that their equipment works in accordance with the clear instructions contained in
their manuals and/or technical characteristics, not guaranteeing the success of any particular type of
application of the equipment.
Altus does not acknowledge any other guarantee, directly or implied, mainly when end customers are
dealing with third-party suppliers.
The requests for additional information about the supply, equipment features and/or any other Altus
services must be made in writing form. Altus is not responsible for supplying information about its
equipment without formal request.
These products use EtherCAT® technology (www.ethercat.org).
COPYRIGHTS
Nexto and MasterTool are the registered trademarks of Altus Sistemas de Automação S.A.
Windows, Windows NT and Windows Vista are registered trademarks of Microsoft Corporation.
OPEN SOURCE SOFTWARE NOTICE
To obtain the source code under GPL, LGPL, MPL and other open source licenses, that is contained
in this product, please contact [e-mail]. In addition to the source code, all referred
license terms, warranty disclaimers and copyright notices may be disclosed under request.

Summary
ii
Table of Contents
1. INTRODUCTION.......................................................................................................................................1
Nexto Series..................................................................................................................................................2
Innovative Features................................................................................................................................3
Documents Related to this Manual .............................................................................................................4
Visual Inspection..........................................................................................................................................5
Technical Support........................................................................................................................................5
Warning Messages Used in this Manual .....................................................................................................5
2. TECHNICAL DESCRIPTION...................................................................................................................6
Panels and Connections...............................................................................................................................6
General Features..........................................................................................................................................8
Common General Features.....................................................................................................................8
Specific Features....................................................................................................................................9
Serial Interfaces...................................................................................................................................12
Ethernet Interfaces...............................................................................................................................13
Power Supply ......................................................................................................................................14
Memory Card Interface........................................................................................................................14
Compatibility with Other Products...........................................................................................................15
Performance...............................................................................................................................................15
Application Times ...............................................................................................................................15
Time for Instructions Execution...........................................................................................................16
Initialization Times..............................................................................................................................16
Interval Time.......................................................................................................................................16
Physical Dimensions ..................................................................................................................................17
NX3004/NX3005.................................................................................................................................17
NX3010/NX3020/NX3030 ..................................................................................................................18
Purchase Data............................................................................................................................................19
Integrant Items.....................................................................................................................................19
Product Code.......................................................................................................................................19
Related Products........................................................................................................................................19
3. INSTALLATION.......................................................................................................................................21
Mechanical Installation .............................................................................................................................21
NX3004 and NX3005 ..........................................................................................................................21
NX3010, NX3020 and NX3030 ...........................................................................................................21
Electrical Installation.................................................................................................................................21
NX3004 and NX3005 ..........................................................................................................................21
NX3010, NX3020 and NX3030 ...........................................................................................................22
Ethernet Network Connection...................................................................................................................23
IP Address...........................................................................................................................................23
Gratuitous ARP ...................................................................................................................................23
Network Cable Installation...................................................................................................................24
Serial Network Connection RS-232...........................................................................................................25
RS-232C Communication....................................................................................................................25
Serial Network Connection RS-485/422....................................................................................................25
RS-485 Communication without termination........................................................................................26
RS-485 Communication with Internal Termination ..............................................................................27
RS-485 Communication with External Termination .............................................................................28
Example of Connection of a RS-485 Network with External Termination and Master Redundancy ......28
RS-422 Communication without Termination ......................................................................................29

Summary
iii
RS-422 Communication with Internal Termination ..............................................................................30
RS-422 Communication with External Termination .............................................................................31
RS-422 Network Example ...................................................................................................................31
Memory Card Installation.........................................................................................................................32
Architecture Installation ...........................................................................................................................33
Module Installation on the Main Backplane Rack.................................................................................33
Programmer Installation...........................................................................................................................33
4. CONFIGURATION...................................................................................................................................34
CPU Configuration....................................................................................................................................34
General Parameters..............................................................................................................................34
External Event Configuration...............................................................................................................43
SOE Configuration ..............................................................................................................................45
Time Synchronization..........................................................................................................................47
Internal Points......................................................................................................................................50
Serial Interfaces Configuration.................................................................................................................59
COM 1 (NX3010/NX3020/NX3030) ...................................................................................................59
COM1 (NX3004/NX3005) and COM 2 (NX3010/NX3020/NX3030) ..................................................62
Ethernet Interfaces Configuration............................................................................................................63
Local Ethernet Interfaces .....................................................................................................................63
Remote Ethernet Interfaces ..................................................................................................................64
Reserved TCP Ports.............................................................................................................................64
NX5000 Module Configuration.................................................................................................................64
Protocols Configuration.............................................................................................................................66
Protocol Behavior x CPU State ............................................................................................................70
Double Points ......................................................................................................................................71
CPU’s Events Queue............................................................................................................................71
Interception of Commands Coming from the Control Center ...............................................................73
MODBUS RTU MASTER...................................................................................................................77
MODBUS RTU SLAVE......................................................................................................................90
MODBUS Ethernet..............................................................................................................................98
OPC DA Server .................................................................................................................................122
Master EtherCAT ..............................................................................................................................134
EtherNet/IP........................................................................................................................................152
IEC 60870-5-104 Server ....................................................................................................................160
Communication Performance .................................................................................................................173
MODBUS Server...............................................................................................................................173
OPC Server........................................................................................................................................175
Server IEC60870-5-104.....................................................................................................................175
System Performance................................................................................................................................176
I/O Scan Time ...................................................................................................................................176
Memory Card ....................................................................................................................................177
RTC Clock...............................................................................................................................................177
Function Blocks for RTC Reading and Writing..................................................................................177
RTC Data Structures..........................................................................................................................181
User Files Memory...................................................................................................................................183
Memory Card ..........................................................................................................................................185
MasterTool Access ............................................................................................................................187
CPU’s Informative and Configuration Menu .........................................................................................188
Function Blocks and Functions ...............................................................................................................191
Special Function Blocks for Serial Interfaces .....................................................................................191
Inputs and Outputs Update.................................................................................................................207
PID Function Block ...........................................................................................................................210
Timer Retain......................................................................................................................................213
Non-Redundant Timer .......................................................................................................................216

Summary
iv
User Log............................................................................................................................................218
ClearRtuDiagnostic............................................................................................................................221
ClearEventQueue...............................................................................................................................221
SNMP.......................................................................................................................................................222
Introduction.......................................................................................................................................222
SNMP in Nexto CPUs .......................................................................................................................222
Private MIB.......................................................................................................................................223
Configuration.....................................................................................................................................226
User and SNMP Communities ...........................................................................................................227
User Management and Access Rights .....................................................................................................228
5. INITIAL PROGRAMMING...................................................................................................................229
Memory Organization and Access ..........................................................................................................229
Project Profiles.........................................................................................................................................231
Single................................................................................................................................................232
Basic .................................................................................................................................................232
Normal ..............................................................................................................................................232
Expert................................................................................................................................................233
Custom..............................................................................................................................................234
Machine Profile .................................................................................................................................234
General Table ....................................................................................................................................235
Maximum Number of Tasks...............................................................................................................235
CPU Configuration..................................................................................................................................237
Libraries...................................................................................................................................................238
Inserting a Protocol Instance...................................................................................................................238
MODBUS RTU.................................................................................................................................239
MODBUS Ethernet............................................................................................................................240
Server IEC 60870-5-104....................................................................................................................242
Finding the Network................................................................................................................................245
Login ........................................................................................................................................................247
Run Mode.................................................................................................................................................248
Stop Mode................................................................................................................................................250
Writing and Forcing Variables ...............................................................................................................250
Logout ......................................................................................................................................................251
Project Upload.........................................................................................................................................251
CPU Operating States..............................................................................................................................253
Run....................................................................................................................................................253
Stop...................................................................................................................................................253
Breakpoint.........................................................................................................................................253
Exception ..........................................................................................................................................253
Reset Warm.......................................................................................................................................253
Reset Cold.........................................................................................................................................253
Reset Origin.......................................................................................................................................253
Reset Process Command (IEC 60870-5-104)......................................................................................254
Programs (POUs) and General Variable Lists (GVLs) ..........................................................................254
MainPrg Program ..............................................................................................................................254
StartPrg Program ...............................................................................................................................254
UserPrg Program ...............................................................................................................................254
GVL Disables....................................................................................................................................254
GVL IOQualities ...............................................................................................................................255
GVL Module_Diagnostics .................................................................................................................256
GVL Qualities ...................................................................................................................................257
GVL ReqDiagnostics.........................................................................................................................259
GVL System_Diagnostics..................................................................................................................261

Summary
v
6. REDUNDANCY WITH NX3030 CPU....................................................................................................263
Introduction.............................................................................................................................................263
Technical Description and Configuration...............................................................................................265
Minimum Configuration of a Redundant CPU (Not Using PX2612 Panel) .........................................265
Typical Configurations of a Redundant CPU......................................................................................265
NX4010 Module................................................................................................................................266
Redundancy Control Panel PX2612 ...................................................................................................267
Interconnections between Half-Clusters and the Redundancy Control Panel PX2612..........................269
General Features................................................................................................................................270
Purchase Data....................................................................................................................................272
Principles of Operation............................................................................................................................273
NX3030 CPU Identification...............................................................................................................273
Single Redundant Project...................................................................................................................273
Redundant Project Structure...............................................................................................................273
Multiple Mapping..............................................................................................................................278
Diagnostics, Commands and User Data Structure...............................................................................279
Cyclic Synchronization Services through NETA and NETB...............................................................280
Sporadic Synchronization Services through NETA and NETB...........................................................281
Project Synchronization Disabling .....................................................................................................282
PROFIBUS Network Configuration...................................................................................................283
Redundant Ethernet Networks with NIC Teaming..............................................................................284
IP Change Methods............................................................................................................................284
NIC Teaming and Active IP Combined Use.......................................................................................288
Ethernet Interfaces Use with Vital Fault Indication.............................................................................288
OPC Communication Use with Redundant Projects............................................................................289
Redundant CPU States.......................................................................................................................289
PX2612 Redundancy Command Panel Functions...............................................................................291
Transition between Redundancy States ..............................................................................................293
First Instants in Active State ..............................................................................................................296
Common Failures which Cause Automatic Switchovers between Half-Clusters..................................296
Failures Associated to Switchovers between Half-Clusters Managed by the User ...............................297
Fault Tolerance..................................................................................................................................298
Redundancy Overhead.......................................................................................................................300
Redundant CPU Programming...............................................................................................................300
Wizard for a New Redundant Project Creation...................................................................................300
Half-Clusters Configuration...............................................................................................................305
Ethernet Ports Configuration in the CPU NX3030 (NET 1 and NET 2) ..............................................305
NX5001 Modules Configuration........................................................................................................307
NX5000 Modules Configuration........................................................................................................309
NX4010 Redundancy Configuration ..................................................................................................310
I/O Drivers Configuration..................................................................................................................311
MainTask Configuration....................................................................................................................311
Redundancy Configuration Object .....................................................................................................313
GVL Diagnostics...............................................................................................................................313
GVLs with Redundant Symbolic Variables ........................................................................................313
POUs from the Program Type with Redundant Symbolic Variables....................................................314
Breakpoints Utilization in Redundant Systems ...................................................................................314
MODBUS Instances Managing in Redundant System ........................................................................314
Limitations on a Redundant PLC Programming..................................................................................314
Getting the Redundancy State of a Half-Cluster .................................................................................315
Reading Non-Redundant Diagnostics.................................................................................................315
Redundant CPU Program Downloading.................................................................................................316
Initial Downloading of a Redundant Project .......................................................................................316
MasterTool Connection with a NX3030 CPU from a Redundant PLC ................................................318
Modification Download in a Redundant Project .................................................................................319

Summary
vi
Off-Line and On-Line Modifications Download.................................................................................319
On-Line Download of Modifications..................................................................................................320
Off-Line Download of Modifications with Process Control Interruption.............................................321
Previous Planning for Off-Line Modifications without Process Control Interruption...........................322
Exploring the Redundancy for Off-Line downloading of Modifications without Interruption of the
Process control...................................................................................................................................327
Maintenance.............................................................................................................................................331
Modules Hot Swapping in a Redundant PLC......................................................................................331
MasterTool Warning Messages ..........................................................................................................331
Redundancy Diagnostics on the NX3030 CPU Graphic Display.........................................................332
Redundancy Diagnostics Structure.....................................................................................................332
PX2612 Panel Test ............................................................................................................................345
7. MAINTENANCE.....................................................................................................................................347
Module Diagnostics..................................................................................................................................347
One Touch Diag.................................................................................................................................347
Diagnostics via LED..........................................................................................................................350
Diagnostics via WEB.........................................................................................................................351
Diagnostic Explorer...........................................................................................................................353
Diagnostics via Variables...................................................................................................................354
Diagnostics via Function Blocks ........................................................................................................368
Graphic Display.......................................................................................................................................370
System Log...............................................................................................................................................372
Not Loading the Application at Startup..................................................................................................372
Power Supply Failure ..............................................................................................................................372
Common Problems ..................................................................................................................................373
Troubleshooting.......................................................................................................................................373
Preventive Maintenance ..........................................................................................................................374
8. GLOSSARY.............................................................................................................................................375
9. ANNEX A. DNP3 INTEROPERABILITY.............................................................................................379
DNP3 Device Profile ................................................................................................................................379
DNP3........................................................................................................................................................379
DEVICE PROFILE DOCUMENT.....................................................................................................379
DNP V3.0 Implementation Table ............................................................................................................380

1. Introduction
1
1.Introduction
Nexto Series CPUs were designed to fulfill several customers’ demands in a variety of applications
present on industrial automation and process control. Due to its compact and rugged body, excellent
performance and fast I/Os update time provided by a unique high-speed communication bus, Nexto
Series CPUs are the best choice for the most demanding control applications. In complex
applications, where reliability, availability and remote I/O operation is required, Nexto Series CPUs
are also a great choice due to its different redundant topologies and bus expansion possibilities.
Nexto Series CPUs provide innovative and unique enhanced diagnostics services. They take the user
to a whole new diagnostics experience. By using a switch located on top of the module and a built-in
compact graphical LCD display, the user has direct access to extensive information regarding I/Os,
fieldbus interfaces and many other modules on the application. In addition, it has user register system
services and ease at debbuging and tasks management, reducing the application cost and installation
time.
Finally, Nexto Series CPUs feature several communication interfaces such as serial and Ethernet
ports, a memory card interface and full IEC 61131-3 programming languages.
Figure 1-1. CPU NX3030

1. Introduction
2
Nexto Series
Nexto Series is a powerful and complete series of Programmable Controllers (PLC) with exclusive
and innovative characteristics. Due to its flexibility, functional design, advanced diagnostic resources
and modular architecture, the Nexto PLC can be used to control systems in small, medium and large
scale applications.
Nexto Series architecture has a great variety of input and output modules. These modules combined
with a powerful 32 bits processor and a high speed bus based on Ethernet, fit to several application
kinds as high speed control for small machines, complex distributed processes, redundant
applications and systems with a great number of I/O as building automation. Furthermore, Nexto
Series has modules for motion control, communication modules encompassing the most popular field
networks among other features.
Nexto Series uses an advanced technology in its bus, which is based on a high speed Ethernet
interface, allowing input and output information and data to be shared between several controllers
inside the same system. The system can be easily divided and distributed throughout the whole field,
allowing the use of bus expansion with the same performance of a local module, turning possible the
use of every module in the local frame or in the expansion frames with no restrictions. For
interconnection between frames expansions a simple standard Ethernet cable is used.
Figure 1-2. Nexto Series –Overview

1. Introduction
3
Innovative Features
Nexto Series brings to the user several innovations in utilization, supervision and system
maintenance. These features were developed focusing a new experience in industrial automation. The
list below shows some new features that users will find in the Nexto Series.
Battery Free Operation: Nexto Series does not require any kind of battery for
memory maintenance and real time clock operation. This feature is extremely
important because it reduces the system maintenance needs and allows the use
in remote locations where maintenance can be difficult to be performed.
Besides, this feature is environmentally friendly.
Multiple Block Storage: Several kinds of memories are available to the user in
Nexto Series CPUs, offering the best option for any user needs. These memories
are divided in volatile memories and non-volatile memories. For volatile memories,
Nexto Series CPUs offer addressable input (%I), addressable output (%Q),
addressable memory (%M), data memory and redundant data memory. For
applications that require non-volatile functionality, Nexto Series CPUs bring retain
addressable memory (%Q), retain data memory, persistent addressable memory
(%Q), persistent data memory, program memory, source code memory, CPU file
system (doc, PDF, data) and memory card interface.
One Touch Diag: One Touch Diag is an exclusive feature that Nexto Series
brings to PLCs. With this new concept, the user can check diagnostic
information of any module present in the system directly on CPU’s graphic
display with one single press in the diagnostic switch of the respective
module. OTD is a powerful diagnostic tool that can be used offline (without
supervisor or programmer), reducing maintenance and commissioning times.
OFD –On Board Full Documentation: Nexto Series CPUs are capable of storing the complete
project documentation in its own memory. This feature can be very convenient for backup purposes
and maintenance, since the complete information is stored in a single and reliable place.
ETD –Electronic Tag on Display: Another exclusive feature that Nexto Series brings to PLCs is
the Electronic Tag on Display. This new functionality brings the process of checking the tag names
of any I/O pin or module used in the system directly to the CPU’s graphic display. Along with this
information, the user can check the description, as well. This feature is extremely useful during
maintenance and troubleshooting procedures.
DHW –Double Hardware Width: Nexto Series modules were designed to save space in user
cabinets or machines. For this reason, Nexto Series delivers two different module widths: Double
Width (two backplane rack slots are required) and Single Width (only one backplane rack slot is
required). This concept allows the use of compact I/O modules with a high-density of I/O points
along with complex modules, such as CPUs, fieldbus masters and power supply modules.
High-speed CPU: All Nexto Series CPUs were designed to provide an outstanding performance to
the user, allowing the coverage of a large range of applications requirements. For example: Nexto
CPUs NX3010, NX3020 and NX3030 can execute a sum, multiplication and subtraction instruction
in less than 15 ns for integer type values and in less than 23 ns for real type values. Nexto CPUs are
able to perform 1,000 PID loops in less than 5 ms.
iF Product Design Award 2012: Nexto Series was the winner of iF Product
Design Award 2012 in industry + skilled trades group. This award is recognized
internationally as a seal of quality and excellence, considered the Oscars of the
design in Europe.

1. Introduction
4
Documents Related to this Manual
In order to obtain additional information regarding the Nexto Series, other documents (manuals and
technical features) besides this one, may be accessed. These documents are available in its last
version on the site http://www.altus.com.br/site_en/.
Each product has a document designed by Technical Features (CE), where the product features are
described. Furthermore, the product may have Utilization Manuals (the manuals codes are listed in
the CE).
For instance, the NX1001 module has the information for utilization features and purchasing on its
CE. On another hand, the NX5001 has, besides the CE, a User Manual (MU).
It is advised the following documents as additional information source:
Code
Description
Language
CE114000
Nexto Series –Technical Characteristics
English
CT114000
Série Nexto –Características Técnicas
Portuguese
CS114000
Serie Nexto –Especificaciones y Configuraciones
Spanish
CE114700
Nexto Series Backplane Racks Technical Characteristics
English
CT114700
Características Técnicas dos Bastidores da Série Nexto
Portuguese
CS114700
Características Técnicas de los Bastidores de la Serie
Nexto
Spanish
CE114900
NX4010 Redundancy Link Module Technical
Characteristics
English
CT114900
Características Técnicas do Módulo de Redundância
NX4010
Portuguese
CS114900
Características Técnicas del Módulo de Redundancia
NX4010
Spanish
CE114902
NX5001 PROFIBUS-DP Master Technical Characteristics
English
CT114902
Características Técnicas do Mestre PROFIBUS DP
NX5001
Portuguese
CS114902
Especificaciones y Configuraciones Maestro PROFIBUS-
DP NX5001
Spanish
CE114903
Ethernet Module NX5000 Technical Characteristics
English
CT114903
Características Técnicas do Módulo Ethernet NX5000
Portuguese
CS114903
Especificaciones y Configuraciones Modulo Ethernet
NX5000
Spanish
CT112500
Características Técnicas do Painel de Controle de
Redundância PX2612
Portuguese
MU214600
Nexto Series User Manual
English
MU214000
Manual de Utilização Série Nexto
Portuguese
MU214300
Manual del Usuario Serie Nexto
Spanish
MU214605
Nexto Series CPUs User Manual
English
MU214100
Manual de Utilização CPUs Série Nexto
Portuguese
MU214305
Manual del Usuario CPUs Serie Nexto
Spanish
MU299609
MasterTool IEC XE User Manual
English
MU299048
Manual de Utilização MasterTool IEC XE
Portuguese
MU299800
Manual del Usuario MasterTool IEC XE
Spanish
MP399609
MasterTool IEC XE Programming Manual
English
MP399048
Manual de Programação MasterTool IEC XE
Portuguese
MP399800
Manual de Programación MasterTool IEC XE
Spanish
MU214601
NX5001 PROFIBUS DP Master User Manual
English
MU214001
Manual de Utilização Mestre PROFIBUS DP NX5001
Portuguese
MU214301
Manual del Usuario Maestro PROFIBUS DP NX5001
Spanish
MU219000
Ponto Series Utilization Manual
English
MU209000
Manual de Utilização da Série Ponto
Portuguese
MU209508
Manual de Utilização Cabeça PROFIBUS PO5063V1 e
Cabeça Redundante PROFIBUS PO5063V5
Portuguese
MU219511
PO5064 PROFIBUS Head and PO5065 Redundant
PROFIBUS Head Utilization Manual
English

1. Introduction
5
MU209511
Manual de Utilização Cabeça PROFIBUS PO5064 e
Cabeça Redundante PROFIBUS PO5065
Portuguese
MU209020
Manual de Utilização Rede HART sobre PROFIBUS
Portuguese
MU223603
Nexto IEC 60870-5-104 Server Device Profile Domument
English
Table 1-1. Related Documents
Visual Inspection
Before resuming the installation process, it is advised to carefully visually inspect the equipments,
verifying the existence of transport damage. Verify if all parts requested are in perfect shape. In case
of damages, inform the transport company or Altus distributor closest to you.
CAUTION:
Before taking the modules off the case, it is important to discharge any possible static energy
accumulated in the body. For that, touch (with bare hands) on any metallic grounded surface
before handling the modules. Such procedure guaranties that the module static energy limits
are not exceeded.
It’s important to register each received equipment serial number, as well as software revisions, in
case they exist. This information is necessary, in case the Altus Technical Support is contacted.
Technical Support
For Altus Technical Support contact in São Leopoldo, RS, call [phone]. For further
information regarding the Altus Technical Support existent on other places, see
http://www.altus.com.br/site_en/ or send an email to [email protected].br.
If the equipment is already installed, you must have the following information at the moment of
support requesting:
The model of the used equipments and the installed system configuration
The CPU serial number
The equipment revision and the executive software version, written on the tag fixed on the
product side
CPU operation mode information, acquired through MasterTool IEC XE
The application software content, acquired through MasterTool IEC XE
Used program version
Warning Messages Used in this Manual
In this manual, the warning messages will be presented in the following formats and meanings:
DANGER:
Reports potential hazard that, if not detected, may be harmful to people, materials,
environment and production.
CAUTION:
Reports configuration, application or installation details that must be taken into consideration
to avoid any instance that may cause system failure and consequent impact.
ATTENTION:
Identifies configuration, application and installation details aimed at achieving maximum operational
performance of the system.

2. Technical Description
6
2.Technical Description
This chapter presents all technical features from Nexto Series CPUs NX3004, NX3005, NX3010,
NX3020 and NX3030.
Panels and Connections
The following figure shows the CPU NX3030 front panel.
Figure 2-1. CPU NX3030
As it can be seen on the figure, on the front panel upper part is placed the graphic display used to
show the whole system status and diagnostics, including the specific diagnostics of each module. The
graphic display also offers an easy-to-use menu which brings to the user a quick mode for parameters
reading or defining, such as: inner temperature (reading only) and local time (reading only).
Just below the graphic display, there are 2 LEDs used to indicate alarm diagnostics and watchdog
circuit. The Table 2-1 shows the LEDs description. For further information regarding the LEDs status
and meaning, see Diagnostics via LED chapter.
LED
Description
DG
Diagnostics LED
WD
Watchdog LED
Table 2-1. LEDs Description
Nexto Series CPUs has two switches available to the user. Table 2-2 shows the description of these
switches. For further information regarding the diagnostics switch, see chapters One Touch Diag and

2. Technical Description
7
CPU’s Informative and Configuration Menu. For further information regarding the MS switch, see
Configuration - Memory Card.
Keys
Description
Diagnostics
Switch
Switch placed on the module upper part. Used for diagnostics visualization on
the graphic display or for navigation through the informative menu and CPU
configuration.
MS
Switch placed on the frontal panel. Used to securely remove the memory card.
Table 2-2. Keys Description
On the frontal panel the connection interfaces of Nexto Series CPUs are available. These interfaces
are: Ethernet communication, serial communication and memory card interface. Table 2-3 presents a
brief description of these interfaces.
Interfaces
Available on
Models
Description
NET 1
NX3004
NX3005
NX3010
NX3020
NX3030
RJ45 communication connector standard 10/100Base-TX.
Allows the point to point or network communication.
For further utilization information, see Ethernet Interfaces
Configuration section.
NET 2
NX3020
NX3030
RJ45 communication connector pattern 10/100Base-TX.
Allows the point to point or network.
For further utilization information, see Ethernet Interfaces
Configuration section.
COM 1
NX3010
NX3020
NX3030
DB9 female connector for RS-232 pattern communication.
Allows the point to point or network.
For further utilization information, see Serial Interfaces
Configuration section.
COM1
NX3004
NX3005
DB9 female connector for RS-485 and RS-422 standard.
Allows point-to-point or network communication.
For further utilization information, see Serial Interfaces
Configuration section.
COM 2
NX3010
NX3020
NX3030
Power Supply
NX3004
NX3005
6-terminal connector with fixing. It powers Nexto series
modules connected at the same bus, providing 15 W of
power.
MEMORY SLOT
NX3010
NX3020
NX3030
Memory card slot. Allows the use of a memory card for
different types of data storage such as: user logs, Web
pages, project documentation and files.
For further utilization information, see Configuration-Memory
Card section.
Table 2-3. Connection Interfaces

2. Technical Description
8
General Features
Common General Features
NX3004, NX3005, NX3010, NX3020, NX3030
Backplane rack occupation
2 sequential slots
Programming languages
Instruction List (IL)
Structured Text (ST)
Ladder Diagram (LD)
Sequential Function Chart (SFC)
Function Block Diagram (FBD)
Continuous Function Chart (CFC)
Tasks
Cyclic (periodic)
Event (software event)
External (hardware event)
Freewheeling (continuous)
Status (software event)
Online changes
Yes
Hot swap support
Yes
Bus expansion redundancy support
Yes
Serial interfaces
NX3004/NX3005 –COM 1: 1 x RS-485 / RS-422
NX3010/NX3020/NX3030 –COM 1: 1 x RS-232C
NX3010/NX3020/NX3030 –COM 2: 1 x RS-485 / RS-422
MODBUS Protocol
RTU (COM 1 and COM 2) master and slave
TCP (NET 1 and NET 2) client and server
RTU via TCP (NET1 and NET2) client and server
OPC protocol
Server
EtherCAT protocol
Master(NX3020 and NX3030)
SNMP Protocol
Server, v1, v2c and v3 versions
IEC 60870-5-104 Protocol
Server (NX3005, NX3020 and NX3030)
DNP3 (SOE) Protocol
Server, to event register (NX3020 and NX3030)
SNTP Protocol
Client, to clock synchronism
Real time clock (RTC)
Yes
Resolution of 1 ms and maximum variance of 2 s per day
Watchdog
Yes
Status and diagnostic indication
Graphic display, LEDs, web pages and CPU’s internal
memory
One Touch Diag (OTD)
Yes
Electronic Tag on Display (ETD)
Yes
Isolation
Logic to protective earth
1250 Vac / 1 minute
Logic to Ethernet interfaces
1500 Vac / 1 minute
Logic to serial port (COM 2)
1000 Vac / 1 minute
Logic to serial port NX3004/NX3005
(COM 1)
1000 Vac / 1 minute
Ethernet interfaces to protective
earth
1250 Vac / 1 minute
Ethernet interfaces to serial port
(COM 2)
1500 Vac / 1 minute
Ethernet interfaces to serial port on
the NX3004/NX3005 (COM 1)
1500 Vac/ 1 minute
Ethernet interface to Ethernet
interface
1500 Vac / 1 minute
Serial port (COM 2) to protective
earth
1250 Vac / 1 minute
Serial port N3004/NX3005 (COM 1)
to protective earth
1000 Vac / 1 minute
Operating temperature
0 to 60 °C
Storage temperature
-25 to 75 °C
Relative humidity
5 to 96 %, non-condensing

2. Technical Description
9
Conformal coating
Yes
IP Level
IP 20
Standards
IEC 61131-2
IEC 61131-3
CE, Electromagnetic Compatibility (EMC) and Low-Voltage
Directive (LVD).
Module dimensions (W x H x D)
36.00 x 114.63 x 115.30 mm
Package dimensions (W x H x D)
44.00 x 122.00 x 147.00 mm
Weight
350 g
Weight with package
400 g
Table 2-4. Common Features
Notes:
Tasks: Task is an object used to call POUs. A Task can be triggered by period, events or can run in
freewheeling mode. Each task can call one or more POUs.
Real Time Clock (RTC): The retention time, time that the real time clock will continue to update
the date and time after a CPU power down, is 15 days for operation at 25 ºC. At the maximum
product temperature, the retention time is reduced to 10 days.
Isolation: The term logic is used to refer to the internal circuits such as processor, memory and bus
interfaces.
Conformal coating: The covering of electronic circuits protects internal parts of the product against
moisture, dust and other harsh elements to electronic circuits.
Specific Features
NX3004
NX3005
NX3010
NX3020
NX3030
Addressable input variables memory (%I)
32 Kbytes
32 Kbytes
32 Kbytes
64 Kbytes
96 Kbytes
Addressable output variables memory (%Q)
32 Kbytes
32 Kbytes
32 Kbytes
64 Kbytes
96 Kbytes
Addressable variables memory (%M)
16 Kbytes
16 Kbytes
16 Kbytes
32 Kbytes
64 Kbytes
Symbolic variables memory
2 Mbytes
3 Mbytes
4 Mbytes
5 Mbytes
6 Mbytes
Maximum amount of memory configurable as
retentive or persistent
7.5 Kbytes
7,5 Kbytes
64 Kbytes
112 Kbytes
112 Kbytes
Total redundant data memory
-
-
-
-
736 Kbytes
Addressable input variables memory (%I)
-
-
-
-
80 Kbytes
Addressable output variables memory (%Q)
-
-
-
-
80 Kbytes
Addressable variables memory (%M)
-
-
-
-
64 Kbytes
Symbolic variables memory
-
-
-
-
512 Kbytes
Program memory
3 Mbytes
3 Mbytes
4 Mbytes
6 Mbytes
8 Mbytes
Source code memory (backup)
32 Mbytes
40 Mbytes
40 Mbytes
80 Mbytes
120 Mbytes
User files memory
16 Mbytes
16 Mbytes
16 Mbytes
32 Mbytes
32 Mbytes
Maximum number of tasks
16
16
16
24
32
Maximum number of expansion bus
1
4
8
24
24
Maximum number of I/O modules on the bus
32
64
128
128
128
Ethernet TCP/IP local interface
1
1
1
2
2
Maximum number of additional Ethernet TCP/IP
interface modules
0
1
0
2
6
Ethernet TCP/IP interface redundancy support
No
No
No
Yes
Yes

2. Technical Description
10
Maximum number of PROFIBUS-DP network
(using master modules PROFIBUS-DP)
1
1
1
4
4
PROFIBUS-DP network redundancy support
No
No
No
Yes
Yes
Redundancy support (half-clusters)
No
No
No
No
Yes
Event oriented data reporting (SOE)
No
No
No
Yes
Yes
Protocol
-
-
-
DNP3
DNP3
Maximum event queue size
-
-
-
1000
1000
Clock synchronization (SNTP)
Yes
Yes
Yes
Yes
Yes
Web pages development (available trough
the HTTP protocol)
No
Yes
No
No
No
Integrated power supply
Yes
Yes
No
No
No
Current consumption from backplane rack power
supply
-
800 mA
1000 mA
1000 mA
Power dissipation
4 W
4 W
4 W
5 W
5 W
Table 2-5. Specific Features
Notes:
Addressable input variables memory (%I): Area where the addressable input variables are stored.
Addressable variables means that the variables can be accessed directly using the desired address.
For instance: %IB0, %IW100. Addressable input variables can be used for mapping digital or analog
input points. As reference, 8 digital inputs can be represented per byte and one analog input point can
be represented per two bytes.
Total addressable output variables memory (%Q): Area where the addressable output variables
are stored. Addressable variables means that the variables can be accessed directly using the desired
address. For instance: %QB0, %QW100. Addressable output variables can be used for mapping
digital or analog output points. As reference, 8 digital outputs can be represented per byte and one
analog output point can be represented per two bytes.
The addressable output variables can be configured as retain, persistent or redundant variables, but
the total size is not modified due to configuration.
The Nexto Series NX3030 CPU allows defining an area of redundant variables inserted inside of the
addressable output variables %Q. The subset of addressable output variables memories are part of the
total size of available memory.
Addressable variables memory (%M): Area where the addressable marker variables are stored.
Addressable variables means that the variables can be accessed directly using the desired address.
For instance: %MB0, %MW100.
Symbolic variables memory: Area where the symbolic variables are stored. Symbolic variables are
IEC variables created in POUs and GVLs during application development, not addressed directly in
memory. Symbolic variables can be defined as retain or persistent. In these cases, it will be used the
memory area of retain symbolic variables memory or persistent symbolic variables memory
respectively.
Persistent and Retain symbolic variables memory: Area where are allocated the retentive
symbolic variables. The retentive data keep its respective values even after a CPU’s cycle of power
down and power up. The persistent data keep its respective values even after the download of a new
application in the CPU.
ATTENTION:
The declaration and use of symbolic persistent variables should be performed exclusively through
the Persistent Vars object, which may be included in the project through the tree view in Application
-> Add Object -> Persistent Variables. It should not be used to VAR PERSISTENT expression in
the declaration of field variables of POUs.

2. Technical Description
11
The full list of when the symbolic persistent variables keep their values and when the value is lost
can be found in the Table 2-6. Besides the persistent area size declared in the Table 2-5, are reserved
these 44 bytes to store information about the persistent variables (not available for use).
The Table 2-6 shows the behavior of retentive and persistent variables for different situations in
which “-“ means the value is lost and “X” means the value is kept.
Command
Symbolic variable
Retain variable
Persistent variable
Reset warm/Power-on/off cycle
-
X
X
Reset cold
-
-
X
Reset origin
-
-
-
Remove CPU or Power Supply
from the rack while energized.
-
-
-
Download
-
-
X
Online change
X
X
X
Reboot PLC
-
X
X
Clean All
-
-
X
Reset Process (IEC 60870-5-104)
-
X
X
Table 2-6. Post-command Variable Behavior
In versions 1.5.0.21 and lower for NX3004 and 1.5.1.0 for NX3010, NX3020 and NX3030, the
retentive and persistent symbolic memories and addressable output variables memory (%Q) used to
have a fixed maximum size. On Table 2-7, it’s possible to consult the maximum sizes allowed in
these older versions.
In versions above the ones mentioned, the CPUs allow flexible retentive and persistent memory sizes.
For further information, refer to the section Retain and Persistent Memory Areas.
NX3004
NX3010
NX3020
NX3030
Retentive addressable output variables
memory (%Q)
2 Kbytes
8 Kbytes
16 Kbytes
16 Kbytes
Persistent addressable output variables
memory (%Q)
2 Kbytes
8 Kbytes
16 Kbytes
48 Kbytes
Retentive symbolic variables memory
2 Kbytes
32 Kbytes
48 Kbytes
32 Kbytes
Persistent symbolic variables memory
1,5 Kbytes
16 Kbytes
32 Kbytes
16 Kbytes
Table 2-7. Retentive and Persistent memories in older versions
In the case of Clean All command, if the application has been modified so that persistent variables
have been removed, inserted into the top of the list or otherwise have had its modified type, the value
of these variables is lost (when prompted by the tool MasterTool to download). Thus it is
recommended that changes to the persistent variables GVL only include adding new variables on the
list.
Total redundant data memory: Redundant data memory is the maximum memory area that can be
used as redundant memory between two redundant CPUs. This value is not a different memory, note
that the sum of all redundant variables (addressable input variable, addressable output variable,
addressable variable, symbolic variable, retain symbolic variable, persistent symbolic variable) must
be less than or equal to the available redundant data memory.
Program memory: Program memory is the maximum size that can be used to store the user
application. This area is shared with source code memory, being the total area the sum of “program
memory” and “source code memory”.
Source code memory (backup): This memory area is used as project backup. If the user wants to
import the project, MasterTool IEC XE will get the information required in this area. Care must be
taken to ensure that the project saved as a backup is up to date to avoid the loss of critical

2. Technical Description
12
information. This area is shared with source code memory, being the total area the sum of “program
memory” and “source code memory”.
User files memory: This memory area offers another way for the user to store files such as doc, pdf,
images, and other files. This function allows data recording as in a memory card. For further
information check User Files MemoryUser Files Memory.
Maximum number of tasks: The maximum number of tasks defined for each CPU model, and
among different project profiles, is better detailed in the chapter Maximum Number of Tasks.
Redundancy support (half-clusters): The software version 1.1.0.0 or onwards/product revision AB
or onwards supports redundancy of NX3030 CPUs.
Event oriented data reporting (SOE): The data types are found in the DNP3 Device Profile.
Maximum number of PROFIBUS-DP network: From MasterTool IEC XE version 1.22 and
onwards, 4 PROFIBUS-DP networks are supported for NX3020 and NX3030 CPUs. Previous
versions support 2 PROFIBUS-DP networks. The limit of PROFIBUS-DP masters is 4, which means
that only 2 redundant networks can be used.
Serial Interfaces
COM 1(NX3010/NX3020/NX3030)
NX3010, NX3020, NX3030
Connector
Shielded female DB9
Physical interface
RS-232C
Modem signals
RTS, CTS, DCD
Baud rate
200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400,
57600, 115200 bps
Protocols
Master/ Slave MODBUS RTU
Open protocol
Table 2-8. COM 1 Serial Interface Features
COM 1 (NX3004/NX3005) and COM 2 (NX3010/NX3020/NX3030)
NX3004, NX3005, NX3010, NX3020, NX3030
Connector
Shielded female DB9
Physical interface
RS-422 or RS-485 (depends on the cable choice)
Communication direction
RS-422: full duplex
RS-485: half duplex
RS-422 maximum transceivers
11 (1 transmitter and 10 receivers)
RS-485 maximum transceivers
32
Termination
Yes (optional via cable selection)
Baud rate
200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400,
57600, 115200
Protocols
Master/ Slave MODBUS RTU
Open protocol
Table 2-9. COM 2 Serial Interface Features
Notes:
Physical Interface: Depending on configuration of the used cable it is possible to choose the kind of
physical interface: RS-422C or RS-485. The list of cables can be found at Related Products section.
RS-422 Maximum Transceivers: It is the maximum number of transceivers that can be used on a
same bus.