CARLO GAVAZZI NRGC Series User manual

NRG PROFINET User Manual
Operating instructions
Manuale d’istruzioni
Betriebsanleitung
Manuel d’instructions
Manual de instrucciones
Brugervejledning

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Table of Contents
1. Introduction ............................................................................................................................................................................................ 2
1.1 Foreword ...................................................................................................................................................................................... 2
1.2 Scope ........................................................................................................................................................................................... 2
1.3 Disclaimer..................................................................................................................................................................................... 2
1.4 Warning notice system ................................................................................................................................................................... 2
1.5 Qualified personnel ....................................................................................................................................................................... 2
1.6 Abbreviations and acronyms........................................................................................................................................................... 3
1.7 Other documents........................................................................................................................................................................... 3
1.8 Disposal........................................................................................................................................................................................ 3
2. Description ............................................................................................................................................................................................. 4
2.1 System overview............................................................................................................................................................................. 4
2.2 System components........................................................................................................................................................................ 4
3. Installation.............................................................................................................................................................................................. 6
3.1 System configuration ...................................................................................................................................................................... 6
3.2 Connection diagrams..................................................................................................................................................................... 6
3.3 Auto- addressing ........................................................................................................................................................................... 7
3.4 Grounding .................................................................................................................................................................................... 8
4. PROFINET Configuration ....................................................................................................................................................................... 10
4.1 Reading the GSD file in TIA Portal ................................................................................................................................................. 10
4.2 Integrating the NRG in the hardware configuration in TIA Portal ...................................................................................................... 10
4.3 Configuration of the NRG bus chain in TIA Portal ........................................................................................................................... 12
4.4 Configuration Parameters............................................................................................................................................................. 13
4.5 PROFINET factory reset................................................................................................................................................................. 14
5. Communication .................................................................................................................................................................................... 15
5.1 Cyclic data .................................................................................................................................................................................. 15
5.2 Acyclic Data ................................................................................................................................................................................ 15
5.3 Diagnostic Data........................................................................................................................................................................... 18
6. Functions.............................................................................................................................................................................................. 19
6.1 Functions overview....................................................................................................................................................................... 19
6.2 Switching modes.......................................................................................................................................................................... 19
6.3 Measurements ............................................................................................................................................................................. 22
7. Alarms and Diagnostics......................................................................................................................................................................... 23
7.1 LED indications –NRG Controller.................................................................................................................................................. 23
7.2 LED indications –RG..N ............................................................................................................................................................... 23
7.3 Alarms –NRG Controller.............................................................................................................................................................. 24
7.4 Alarms –RG..N ........................................................................................................................................................................... 25
8. Service and Maintenance....................................................................................................................................................................... 28
8.1 Internal bus communication check................................................................................................................................................. 28
8.2 Replacing an RG..N ..................................................................................................................................................................... 28
8.3 Using the NRG system without ‘REF’ terminal connection................................................................................................................. 29

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1. Introduction
1.1 Foreword
The NRG described hereafter is a sub-system made up of a number of solid state relays intended for the switching of
heaters in a machine. The solid state relays in this system are able to communicate with the main controller through
an NRG controller that facilitates communication between the solid state relays and the main controller. The NRG
controller is available for various communication interfaces including PROFINET and Modbus RTU. Through this
communication, it is possible for the main controller to control each solid state relay, read measurements related to
each specific solid state relay and to identify specific failure modes related to the solid state relay or its associated
heater load.
1.2 Scope
This manual is intended to provide information about the functionalities that are provided by the NRG system, explains
set-up and configuration procedures, provides recommendations for use and gives a troubleshooting guide.
Should there be any problems that cannot be solved with the information provided in this guide, contact your Carlo
Gavazzi sales representative for further assistance.
1.3 Disclaimer
Carlo Gavazzi accepts no liability for any consequence resulting from inappropriate, negligent, incorrect installation
or adjustment of parameters of the equipment. Nor can Carlo Gavazzi assume liability for recommendations that
appear or are implied in the following description. The information in this document is not considered binding on any
product warranty.
The contents of this guide are believed to be correct at the time of publishing. In the interests of commitment to a
policy of continuous development and improvement, Carlo Gavazzi reserves the right to change the specification
of the product or its performance, or the contents of this guide without prior notice.
1.4 Warning notice system
The symbols indicated below are used throughout this guide to indicate a particularly important subject or information
on safety instructions, configuration and installation of the products covered by this guide.
It is strongly recommended that this guide is read thoroughly before using the products and that safety related
recommendations are followed.
Danger
Indicates that death, severe personal injury or property damage will result if proper precautions are not taken.
Warning
Indicates actions that if not observed may lead to damage of the products.
Information
Indicates general information related to the proper use of the products.
1.5 Qualified personnel
The product / system described in this documentation may be operated only by personnel qualified for the specific
task that are also capable of identifying risks and avoid potential hazards when working with these products.
The NRG system features dangerous voltages and consequently failure to observe the instructions contend in this user
manual may cause serious harm to people and damage to property.

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1.6 Abbreviations and acronyms
Acronyms
RG..N /
RG..CM..N
NRG Solid state relays
RGx1A..CM..N
NRG zero cross switching solid state relay
NRGC..
NRG Controller
COM
Common
PLC
Programmable Logic Controller
SSR
Solid State Relay
1.7 Other documents
Datasheets, installation guide, certificates and other relevant documentation can be found online at www.
gavazziautomation.com
1.8 Disposal
Information for users on the correct handling of waste of electrical and electronic equipment (WEEE)
With reference to European Union directive 2002/96/EC issued on 27 January 2003 and the related national
legislation, please note that:
•WEEE cannot be disposed of as municipal waste and such waste must be collected and disposed of
separately
•the public or private waste collection systems defined by local legislation must be used. In addition, the
equipment can be returned to the distributor at the end of its working life when buying new equipment
•the equipment may contain hazardous substances: the improper use or incorrect disposal of such may
have negative effects on human health and on the environment
•the symbol (crossed-out wheelie bin) shown on the product or on the packaging and on the instruction
sheet indicates that the equipment has been introduced onto the market after 13 August 2005 and that
it must be disposed of separately
•in the event of illegal disposal of electrical and electronic waste, the penalties are specified by local
waste disposal legislation.

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2. Description
2.1 System overview
The NRG is a sub-system that consists of one or more BUS chains that interact with the main controller or PLC in the
machine through a PROFINET communication interface. The communication link in the NRG systems can either be
used to control the solid state relay, monitor various parameters and diagnose faults in real time.
An NRG BUS chain is made up of a minimum 1x NRG controller and a minimum of 1x NRG solid state relay (also
referred to as end-device). The NRG bus chain can have a maximum of 32 end devices. The communication link
between the NRG controller and the end-devices is the Internal BUS.
When more solid state relays are needed in a system, multiple BUS chains can be utilised. Each BUS chain connects
to another BUS chain in a line topology via the NRG controllers of the respective BUS chains or in a star topology via
an ethernet switch.
2.2 System components
The following system components are required for an NRG bus chain:
Description
Part number
Notes
NRG controller
NRGC..
NRGC
NRG Controller with Modbus RTU.
NRGC-PN
NRG controller with PROFINET.
1x RGN-TERMRES is included in the NRGC..
packaging. The RGN-TERMRES is to be
mounted on the last RG..N on the bus
chain.
NRG solid state relays
RG..CM..N
RGx1A..CM..N
NRG zero cross switching solid state relay
NRG Internal bus cables
RGCR-GN-xx
Proprietary cables terminated at both ends
with micro USB connector
NRG controller
The NRG controller handles the communication with the higher-level controller and with the NRG solid
state relays. It has to be supplied with a 24VDC supply and provides the power supply to the
connected NRG solid state relays via the internal bus cables. A termination resistor (RGN-TERMRES)
provided with every NRG controller has to be fitted on the last solid state relay of the NRG bus chain.
The NRG controller is also capable of performing internal operations to setup and maintain the internal
bus
Various NRG Controller variants are available which facilitate communication via different
communication protocols. These are identified via the part numbers. The NRG controller with a
PROFINET communication interface is the NRGC-PN.
Figure 1: NRG bus chain

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NRG solid state relays
The RG..N solid state relays are the switching components in the NRG system.
They are available with and without heatsink. For a reference of the variants
available refer to the RG..N datasheet. The RG..CM..N utilises the
communication system for switching, measurement and diagnostic thus
minimising the number of components required in the system.
Through the internal BUS, the main controller can read measurement
parameters and diagnostics information related to the RG..N and its load. The
RG..N is also capable of detecting certain fault conditions. A fault condition
is indicated through a red LED available on the façade of the RG..N. The type
of fault can be identified through a specific flash rate of the red LED and
identified via the communication system.
Since the main controller needs to address each specific RG..N individually, each RG..N needs to be uniquely
identifiable. It is not required to physically set the ID for each RG..N. This can be done through an auto-addressing
function which occurs automatically on the first start up; whereby each RG..N on the bus chain will automatically be
assigned an ID with respect to its physical placement on the internal bus.
NRG internal cables
The RCRGN-xxx-2 is a 5-way proprietary cable used for the internal BUS, i.e., between the NRG
controller and the first RG..N on the BUS chain and between respective RG..Ns on the BUS. This
internal BUS cable though terminated with a micro-USB plug is not a standard USB cable. Apart
from the data and supply lines, the RCRGN-xxx-2 are equipped with an additional wire utilised
for the auto-addressing of the RG..Ns on the NRG bus chain. These cables are available in
various lengths from Carlo Gavazzi.
For further technical information on each NRG system component please refer to the respective product datasheets:
System
component
Datasheet
QR Codes
NRGC-PN
http://gavazziautomation.com/docs/mt_gh/SSR_NRGC_PN.pdf
RG..CM..N /
RCRGN-xxx-2
http://gavazziautomation.com/docs/mt_gh/SSR_RG_CM_N.pdf
.

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3. Installation
Installation general requirements
Avoid installing the device in environments with the following characteristics:
•relative humidity higher than 95% or with condensation;
•strong vibrations or shocks;
•exposure to water sprays;
•exposure to aggressive and polluting atmospheres (e.g.: sulphur and ammonia fumes, saline mist, smoke)
to avoid corrosion and/or oxidation
•strong magnetic and/or radio frequency interference (thus avoid installation near transmitting antennae)
•exposure of the devices to direct sunlight and the elements in general.
3.1 System configuration
The NRG bus chain consists of 1 NRG controller and up to 32 NRG solid state relays. The NRG controller is the interface
to the main controller via the 2xRJ45 shielded communication ports. The connection between the NRG controller and
the solid state relays is through the internal bus cables. Each RG..N is equipped with 2x micro USB ports to allow looping
between one RG..N and another using the RGCGN-xx-2 bus cables from Carlo Gavazzi. The RGN-TERMRES supplied
with each NRG controller has to be connected to the last RG..N on the NRG bus chain.
The NRG controller has to be supplied with a 24VDC via the supply input plug (Us-, Us+). Power to the RG..Ns on the
bus chain is provided via the internal bus cables through the NRG controller.
The RG..Ns require a mains reference connection with respect to the load (neutral or another phase) through the
‘Ref’ connector to provide voltage and power measurements. The Ref connector has 2x internally shorted terminals
to allow for looping of the mains reference onto various RG..Ns.
3.2 Connection diagrams
The NRG bus chain can be connected to the ethernet network via the pair of RJ45 connectors located on the NRG
controller. The NRG can be configured in any network topology. If more than 32 solid state relays are required in an
application, multiple bus chains can be utilised. These can be configured in a line or star topology as deemed fit for
the application. Wiring between PROFINET devices should follow the standard PROFINET cabling guidelines (max.
100m).
Figure 2 NRG bus chain configuration

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The NRG Controller supports the Media Redundancy Protocol (MRP). MRP is a standardised protocol according to
IEC2439. It describes a mechanism for media redundancy in ring topologies. Therefore, the NRG bus chain can also
be configured in a ring topology
3.3 Auto- addressing
The RG..Ns on the bus chain are automatically addressed upon the initial start-up of the system. The RG..Ns are
addressed based on their position on the bus chain.
Figure 5 SSRs in NRG bus chain are automatically addressed based on their position on the bus
Figure 3 NRG bus chains connected in a line PROFINET topology
Figure 4 NRG bus chain connected in a star PROFINET network

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In case of an RG..N replacement, or any changes to the NRG bus chain, the RG..Ns have to be readdressed. Follow
the procedure below (Figure 6) to readdress the RG..Ns on the NRG bus chain manually. Alternatively, auto-
addressing can also be performed digitally, check Communications section for further information.
Figure 6 Manual Auto addressing procedure
STEP 1: Hold the blue button while inserting the power supply plug of the NRGC-PN
STEP 2: Release the blue button once the Alarm LED flashes ON
3.4 Grounding
Connecting the protective ground for the NRG Controller
The NRG controller is equipped with a metal contact clip at the back of the product to provide functional grounding
via the Din Rail. The Din Rail must be conductive and grounded. Shielded Cat 5e cables fitted with an outer metallic
shell should be used. The shell should be connected to the wire screen of the cable.
Figure 7 Metal din clip on NRG controller for functional grounding
STEP 1
STEP 2

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Connecting the protective earth for the NRG solid state relays
The heatsink of the RGC..Ns has to be earthed via the connection provided using an M5 screw. Note that the M5
Protective Earth (PE) screw is not provided with the RG..N.
Figure 8 RG..N connection for Protective Earth

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4. PROFINET Configuration
4.1 Reading the GSD file in TIA Portal
The GSD file is required for the configuration of the NRGC-PN. The GSD file must be installed in the configuration
software. The latest GSD file can be found on
http://www.gavazziautomation.com/images/PIM/OTHERSTUFF/GSDML/GSDML_NRGC-PN.zip
Figure 9 Installing the GSD file
4.2 Integrating the NRG in the hardware configuration in TIA Portal
Find the NRG in the Catalog. Drag and drop from PROFINETIO/Other field devices/NRG/NRGC-PN. GSD should be
installed as indicated in the previous section.
Figure 10 Drag and drop NRGC-PN in Configuration

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Assign the NRG to the PROFINET Controller according to the preferred topology.
Figure 11 Assign NRG system to Controller
Each NRGC-PN can be uniquely identified via the MAC address which can be found on the front façade of the
product. The NRGC-PN is shipped without a PROFINET name and IP address, these have to be assigned by the user.
Note: It is recommended to use the Neighbourhood / Topology detection for the automatic assignment of PROFINET
names. Therefore, both ethernet ports on the NRGC-PN have their own unique MAC address. For X1 increment the
device MAC address by 1 and by 2 for X2.
E.g
NRGC-PN MAC address
00 : 19 : EE : FF : 04 : 00
X1 MAC address
00 : 19 : EE : FF : 04 : 01
X2 MAC address
00 : 19 : EE : FF : 04 : 02
Automatic assignment of PROFINET names has to be enabled as indicated in Figure 12 below.
Figure 12 Enable automatic PROFINET name assignment

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4.3 Configuration of the NRG bus chain in TIA Portal
The NRG bus chain configuration must be mirrored in the TIA device configuration. With the NRG PROFINET controller
(NRGC-PN) occupying Slot 0 and the attached RG..Ns solid state relay occupying the consequent slots based on their
position on the bus chain.
SLOT
0
1
2
3
4
…
32
SLOT 0: represents the NRGC-PN which holds the PROFINET connection
SLOTS 1-32: a maximum of 32 RG..N solid state relays can be connected to 1 NRGC-PN
Drag and drop the modules under the module folder from the hardware Catalog in TIA Portal depending on which
version of the RG..N solid state relay will be installed. For more information regarding the technical specifications of
the different variants of the RG..N solid state relay please refer to the RG.N datasheet.
Figure 13 Slot configuration for the NRG bus chain in TIA Portal

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4.4 Configuration Parameters
The configuration parameters are directly assigned to the respective modules and are set during device
configuration. They are transferred automatically on start-up and during re-parameterization. All configuration
parameters can be reassigned via an acyclic command, check Communications section for further information
Parameter
Description
Values
Monitoring
parameters
Hold Current Period
Set the no. of cycles over which
the Hold Current Reading is
calculated
1 –32
18 (default)
Alarm Settings
Alarm Recovery Mode
Set the alarm recovery mode
Manual /
Automatic
(default)
Over Voltage limit
Set the over and under voltage
limit if desired which will trigger an
alarm if the voltage reading is
beyond the range
Under voltage limit
–660V
Default (660V)
Under Voltage limit
0 –Over voltage
limit
Default (0V)
Over Current limit
Set the over and under current
limit if desired which will trigger an
alarm if the current reading is
beyond the range
Under current limit
–default value
(RG..N
dependent)
Under Current limit
0 –over current
limit
Default (0A)
Over Frequency limit
Set the over and under
frequency limit if desired which
will trigger an alarm if the
frequency reading is beyond the
range
Under frequency
limit –66Hz
Default (66Hz)
Under Frequency limit
44 –Over
frequency limit
Default (44Hz)
Over Temperature
pre-warning
Δ temperature from max at
which the RG..N will issue an
alarm
0 –50degC
Default (0dC)
Control
parameters
Switching modes
Set the firing mode that the RG..N
shall use at the output
External /
ON/OFF (default) /
Burst /
Advanced full
cycle /
Distributed full
cycle
Timebase
Set the desired timebase. (only
applicable for Burst firing mode)
0.1 - 10s
0.1s (default)
Substitute output mode
Set the output mode to be used
in case of a communication
timeout
Clear output /
Hold output
(default) /
Set Value
Substitute output value
Set the % control level to be used
in case of a communication
timeout. (Only applicable for ‘Set
Value option’ for Output
substitute mode
0–100%
Default (0%)

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4.5 PROFINET factory reset
In PROFINET, factory reset is performed using the DCP Protocol.
The NRGC-PN shall accept two types of reset:
1) ResetToFactory with mode 2 –This will set the Name of station and IP address to null and will reset also the
PDEV and SNMP Parameters.
2) FactoryReset –This is an older version of performing a reset but is still in use by many engineering tools. This
will clear all communication parameters as above as well as I&M Data (I&M1,2,3)
Apart from the standard reset functionality as specified in PROFINET, both a ResetToFactory and a Factoryreset shall
set the auto-addressing flag in the NRGC-PN. Therefore, an auto-addressing command will occur on next NRGC-PN
powerup. For more information regarding Auto-addressing function refer to Section 3.3
Note: A PROFINET factory reset Shall NOT perform a factory reset on the NRG solid state relays (RG..Ns). A factory
reset on the RG..Ns can be done via an acyclic command. Refer to the Communications section for more
information.

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5. Communication
5.1 Cyclic data
The cyclic I/O data exchange is an unacknowledged transmission of real time data between the PROFINET device
and PROFINET controller at a specific rate settable by the user. In the NRG system, cyclic data is exchanged
between the PROFINET Controller and the RG..N solid state relays. The data includes parameters measured by each
NRG solid state relay as well as the control value from the PLC to control each solid state relay. The minimum
permissible rate of exchange for the NRG system is 8ms. Refer to the below tables for the list of information provided
via the cyclic data exchange.
Cyclic Input Data
Index
Data
Data type
0
Hold Current Reading
uint16
1
Voltage RMS Reading
uint16
2
Frequency Reading
uint16
3
Current RMS Reading
uint16
4
Apparent Power Reading
uint16
5
Real Power Reading
uint16
The current measurement is returned as scaled integers. Therefore, a current value of 16.81A will be received as 1681.
The PLC program has to convert the numbers into floating point values. For further information regarding the scaling
of each measurement, refer to the Measurements section in this User Manual.
Note: ‘Ref’ terminal connection is required for Voltage, Apparent Power and Real Power readings. Otherwise the
readings of these parameters will be 0.
Cyclic Output Data
Index
Data
Data type
0
Control level (0 -100%)
uint8
In case of ON/OFF control mode, a control level < 100% shall indicate SSR output OFF and a control level of 100% shall
indicate SSR output ON.
For the Power control firing modes (Burst, Distributed full cycle and Advanced full cycle) the % control value shall be
translate to % power of the SSR output. Refer to Section 6.2 for more information on Switching Modes.
5.2 Acyclic Data
Acyclic data In PROFINET is used to transfer data that does not require continuous updates or is not critical to the
ongoing process. Any NRG parameter can be set via an acyclic command even if this is included in the start-up
parameters.
To address a particular variable using the PROFINET acyclic command the slot, subslot and index are required.
Slot
Address of NRGC-PN (Always 0) OR
Address of RG..N (1 -32) depending on its position on the NRG bus chain
Subslot
Always 1
Index
The index of the variable (see tables below)
Data Size
The size of the data required
Reading and writing is possible for all variables except for variables related the SSR history as indicated in the tables
below. The datatype of each index is uint16. The indexes are in the form of high byte followed by low byte (big
endian).

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Acyclic data for NRGC-PN
Index
Description
Size
Valid Values
1
Auto-addressing
Command/Status
2 bytes
Writing:
1 -> Trigger an auto-addressing of the NRG bus chain on
the next NRGC-PN powerup.
Acyclic data for RG..Ns
Index
Description
Size
Parameters
1
Monitoring
Parameters
2 bytes
Hold current period
2
Alarm Parameters
16 bytes
Alarm Setting
Over voltage limit
Under voltage limit
Over current limit
Under current limit
Over frequency limit
Under frequency limit
Over temperature pre-warning
3
Control Parameters
8 bytes
Output substitute mode
Output substitute value
Firing mode
Time base (for Burst firing mode)
4
RG..N Commands
2 bytes
RG..N command
5
TEACH Parameters
6 bytes
TEACH voltage reference
TEACH current reference
TEACH % load deviation
6
Load Running Hours
2 bytes
Load Running hours
7
SSR History
(read only)
6 bytes
Energy Reading (low)
Energy Reading (high)
SSR ON time
A description of each parameter with an indication of the possible values is listed in the table below
Parameters
Description
Values
Hold current period
Set the no. of cycles over which the
Hold Current Reading is calculated
1 –32
18 (default)
Alarm Setting
Set the alarm recovery mode
0 →Automatic (default)
1→Manual
Over voltage limit
Set the over and under voltage limit if
desired which will trigger an alarm if
the voltage reading is beyond the
range
Under voltage limit –660V
Default (660V)
Under voltage limit
0 –Over voltage limit
Default (0V)
Over current limit
Set the over and under current limit if
desired which will trigger an alarm if
the current reading is beyond the
range
Under current limit –default
value (RG..N dependent)
Under current limit
0 –over current limit
Default (0A)

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Over frequency limit
Set the over and under current limit if
desired which will trigger an alarm if
the current reading is beyond the
range
Under frequency limit –66Hz
Default (66Hz)
Under frequency limit
44 –Over frequency limit
Default (44Hz)
Over temperature
pre-warning
Δ temperature from max at which
the RG..N will issue an alarm
0 –50degC
Default (0dC)
Output substitute mode
Set the output mode to be used in
case of a communication timeout
0 →Clear Output
1 →Hold Output (default)
2 →Set Value
Output substitute value
Set the % control level to be used in
case of a communication timeout.
(Only applicable for ‘Set Value
option’ for Output substitute mode
0 (default) –100%
Firing mode
Set the firing mode that the RG..N
shall use at the output
0 →External
1 →ON/OFF (default)
2 →Burst
3 →Advanced full cycle
4 →Distributed full cycle
Timebase
Set the desired timebase. (only
applicable for burst firing mode)
0.1 (default) - 10s
RG..N commands
Insert value to indicate the
command that shall be executed by
the RG..N
1 -> start a TEACH operation
4 -> store parameters
permanently in RG..N
8 -> clear Latched Alarms in
case latching of alarms is
activated
99 -> factory reset of RG..N
TEACH voltage reference
Holds the reference voltage to be
used for the load deviation alarm.
Value be updated automatically with
a TEACH command or manually.
If TEACH is not successful value will
reset to 0
0 (default) –660VAC
TEACH current reference
Holds the reference current to be
used for the load deviation alarm.
Can be updated automatically with
a TEACH command or manually
If TEACH is not successful value will
reset to 0
0 –Max. current limit (RG..N
dependent)
TEACH % load deviation
Holds the percentage load deviation
used for the load deviation alarm.
4–100%
10% (default)
Load running hours reset
Use this index to reset the load
running hours reading in case of load
or SSR replacement in hours
0 hrs (default) -
Energy Reading (low)
(read only)
The energy reading is split into 2
indexes. This index holds the lower
value
0 (default) -
Energy Reading (high)
(read only)
This index holds the upper value of
the energy reading
0 (default) -
SSR ON time
(read only)
Holds the accumulated time in hours
that the output of the RG..N was
switched ON
0 (default) -
Note: Reading the Energy (low) and Energy (high) readings as a uint32 will give the actual energy measurement

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5.3 Diagnostic Data
Alarms from the NRG bus chain are passed as an event driven acyclic command via the PROFINET Diagnostic System.
Alarms are generated from both the NRG controller as well as each NRG solid state relay on the bus chain. The
diagnostic type used for al alarm is the channel diagnosis (USI = 0x8000). Alarms are identified using the slot / subslot
configuration of the NRG bus chain.
NRGC-PN Alarms
Alarm
Severity
Alarm Number
Internal Error
Fault
0x4000
Bus Error
Fault
0x0013
Device Limit Error
Fault
0x4001
Termination Error
Maintenance Demanded
0x4002
Device Conflict Error
Fault
0x4003
Device Unconfigured Error
Fault
0x4004
Device Position Error
Maintenance Required
0x4005
Power Supply out of range
Fault
0x0011
RG..N Alarms
Alarm
Severity
Alarm Number
Mains loss
Fault
0x4020
Load loss / SSR open circuit
Fault
0x4021
Short Circuit
Fault
0x0001
Voltage out of range
Maintenance Demanded
0x4022
Current out of range
Maintenance Demanded
0x4023
Frequency out of range
Maintenance Demanded
0x4024
Over Temperature Prewarning
Maintenance Required
0x4025
Temperature out of range
Fault
0x0005
Load Deviation flag
Maintenance Demanded
0x4026
Internal Error
Fault
0x4027
Device Position Error
Maintenance Required
0x4028
PROFINET Pull / Plug Alarms
In PROFINET, Pull and Plug Alarms occur when modular devices are disconnected (pulled)/ connected (plugged).
Whenever a plug event occurs, the module in question is reparametrized automatically by PLC. These are standard
PROFINET alarms that do not fall under the channel diagnostics.
In the case of the NRG a Pull alarm shall indicate that an RG..N has stopped responding on the chain. When the device
recovers from a Pull either by reconnection or a recovery from a crash, the Plug alarm shall be triggered.
Note: It is not possible to plug new RG..Ns during runtime.

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V1.3 | NRG PROFINET User Manual | © 2020 | CARLO GAVAZZI LTD.
EN
6. Functions
6.1 Functions overview
The NRG solid state relays are equipped with a range of functionality within one device. For a list of some of the
features refer to the table below.
Feature
RGx1A..CM..N
External Control
X
ON / OFF Control
X
Power Control
X
Monitoring of system parameters
X
SSR diagnostics
X
Load diagnostics
X
Overtemperature protection
X
6.2 Switching modes
ON / OFF mode
The ON-OFF mode controls the solid state relays at the user’s command. Through an I/O output message, the RG..N
can be controlled using the control level. A control level of 0% indicates SSR output OFF and a control level of 100%
indicates SSR output ON.
The advantages of this mode are:
• It is effectively a direct replacement of the A1-A2, i.e. for existing systems, the control algorithm within the PLC can
be left relatively untouched and the output is redirected via the communication interface.
All RG..Ns on the bus chain can be controlled within 10ms.
Burst Firing mode
The Burst firing mode works with the control level and a time-base parameter which can be varied from 0.1 seconds
to 10 seconds. The percentage ON time is then determined by the control level via an I/O output command. Therefore,
with a control level of 10% ;10% of the time-base will be ON and 90% will be OFF. The figure below shows example
waveforms of this firing mode at different control levels. In this example the time base was set to 1 second. The
percentage control resolution depends on the timebase set by the user. To achieve a 1% resolution, the time base has
to be a minimum of 2 sec for 50Hz and 1.7 sec for 60Hz.
Output with Burst firing mode @ 33% control level
Output with Burst firing mode @ 50% control level