NRG Systems LOGR-S User manual

LOGR-S Manual | 11/5/2021| 1

NRG Product Manual
LOGR-S Data Logger
NRG_LOGR-S_Manual
Rev. 1.0
[e-mail] | Page 2
5 November 2021
TABLE OF CONTENTS
SECTION 1 | INTRODUCTION ................................................................................................................................................... 4
About This Manual ...................................................................................................................................................... 4
Typographic Conventions............................................................................................................................................. 4
Quick Start................................................................................................................................................................... 5
Getting Help ................................................................................................................................................................ 6
Product Overview........................................................................................................................................................ 7
Data............................................................................................................................................................................... 8
Communications ............................................................................................................................................................ 8
Concept of Operation ..................................................................................................................................................... 8
Channels ........................................................................................................................................................................ 9
Precautions.................................................................................................................................................................. 9
Environmental Considerations........................................................................................................................................ 9
SECTION 2 | SYSTEM OVERVIEW ............................................................................................................................................10
Unpacking LOGR.........................................................................................................................................................10
Components Map .......................................................................................................................................................10
Power Source .............................................................................................................................................................12
SECTION 3 | PRE-INSTALLATION PREPARATION......................................................................................................................13
Connecting through the Ethernet port ........................................................................................................................13
Network Settings Configuration..................................................................................................................................14
Configuring the IP Address ............................................................................................................................................14
Modbus RTU .................................................................................................................................................................16
NTP Server ....................................................................................................................................................................17
System Configuration .................................................................................................................................................18
Site Properties...............................................................................................................................................................18
Date and Time...............................................................................................................................................................19
System Info ...................................................................................................................................................................19
Channel Configuration & Data Collection....................................................................................................................20
Analog Sensors..............................................................................................................................................................20
Analog Channel Configuration.......................................................................................................................................21
Modbus RTU Serial Sensor Configuration ......................................................................................................................24
Serial Port Configuration...............................................................................................................................................24
Serial Channel Configuration.........................................................................................................................................25
PV Soiling Configuration................................................................................................................................................28
Sensor Configuration Reset.........................................................................................................................................29
Data Storage...............................................................................................................................................................30
Firmware Updates ......................................................................................................................................................30
FTP .............................................................................................................................................................................32
Command Files..............................................................................................................................................................32
Command File Options ..................................................................................................................................................33
Diagnostics .................................................................................................................................................................36
Control Diagnostics .......................................................................................................................................................36
Analog Diagnostics .......................................................................................................................................................37
Excitation Status ...........................................................................................................................................................37
Status Registers ..........................................................................................................................................................38
SECTION 4 | FIELD INSTALLATION...........................................................................................................................................39
Grounding & Lightning Considerations........................................................................................................................39
Mounting....................................................................................................................................................................40
Required Tools............................................................................................................................................................41
Sensor Connections ....................................................................................................................................................41
Routing Sensor Cables into the Shelter box....................................................................................................................41
Connecting Sensor Wires to LOGR .................................................................................................................................42

NRG Product Manual
LOGR-S Data Logger
NRG_LOGR-S_Manual
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5 November 2021
Wiring Map...................................................................................................................................................................43
Logger Data Acquisition..............................................................................................................................................45
Data File Transfer..........................................................................................................................................................45
File Types ......................................................................................................................................................................47
File Transfer Schedule ...................................................................................................................................................47
File Export .....................................................................................................................................................................48
SECTION 5 | COMMUNICATION & DATA.................................................................................................................................49
Modbus ......................................................................................................................................................................49
Network & Data Flow....................................................................................................................................................49
Demo Client ..................................................................................................................................................................50
Modbus Map.................................................................................................................................................................50
Export File Format ......................................................................................................................................................51
SECTION 6 | POWER SYSTEMS................................................................................................................................................56
Powering the LOGR Logger .........................................................................................................................................56
Powering Sensors .......................................................................................................................................................56
Grid-Tied Power Systems............................................................................................................................................56
Autonomous Power Systems ......................................................................................................................................56
APPENDIX A | TECHNICAL SPECIFICATIONS.............................................................................................................................57
APPENDIX B | MODBUS MAP .................................................................................................................................................59
APPENDIX C | DECLARATION OF CONFORMITY.......................................................................................................................69
APPENDIX D | WARRANTY .....................................................................................................................................................71
Sending Items for Repair ...............................................................................................................................................71
APPENDIX E | REFERENCES.....................................................................................................................................................73

NRG Product Manual
LOGR-S Data Logger
NRG_LOGR-S_Manual
Rev. 1.0
[e-mail] | Page 4
5 November 2021
SECTION 1 | INTRODUCTION
About This Manual
This manual is organized to provide a system overview followed by more detailed configuration and
installation instructions.
Typographic Conventions
This type style is used for the general body of this manual.
Instructions in Bold type direct you to perform an operation on screen.
This style is used to warn users of a potential danger, either to themselves or to the equipment/data.
Note- This style is used to indicate a tip or an important note.
This symbol indicates information that is critical to understanding the
operation of the equipment and/or actions that could damage the
equipment without endangering the user.
This symbol indicates a hazard to the user, the equipment, or both
that could result in serious injury or damage.
This symbol indicates a serious hazard to the user that could result in
death or dismemberment.
This symbol indicates an electrical hazard to the user.
This symbol indicates a hot surface hazard to the user, the
equipment, or both.
This symbol indicates an ESD hazard to sensitive equipment.

NRG Product Manual
LOGR-S Data Logger
NRG_LOGR-S_Manual
Rev. 1.0
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5 November 2021
Quick Start
The basic steps necessary to start receiving data from your LOGR system are as follows:
1. Connect
•16 to 28 V DC power supply (4 A max) to power terminals
•Ethernet cable from computing device to LOGR Ethernet port
2. Open a web browser and connect to the LOGR default IP Address via URL: IP address/index
3. Configure FTP Server (optional feature)
4. Update LOGR firmware
5. Configure:
•Static IP Address (Logger > Network Settings)
•Site name, project name, location details (Logger > System Configuration)
•Time Zone setting (Logger > System Configuration)
•NTP server (Logger > Time Synchronization, optional)
•Channels for the sensors you wish to connect (Sensors menu)
•FTP settings (Logger > File Transfer Settings, optional)
6. Save
7. Update LOGR firmware, if indicated.

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LOGR-S Data Logger
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Getting Help
NRG Systems offers a variety of support options to help you get the most from your NRG product. If you
have questions about your NRG product, first look in the product documentation on the NRG website
(https://www.nrgsystems.com/products/solar-data-loggers/detail/logr-s-data-logger/).
If you cannot find the answer, contact your salesperson or NRG Systems Technical Support for assistance
using the information below. Customer support is available 8:30 AM to 5:00 PM ET, Monday through
Friday.
Telephone: [phone] ext. 3
Fax: [phone]
Email: [e-mail]
When you call or email, please have the appropriate product documentation and the following
information:
•Customer name
•Who purchased equipment
•Item number or description
•Serial number(s)
•When equipment was purchased
•Where equipment is installed including terrain and climatic conditions
•Description of the problem with some detail
•What events took place leading up to the problem
•What you have tried while attempting to solve the problem
You may be asked to provide data files or logs to help us investigate an issue. All information and data
provided are kept strictly confidential.
NRG Systems maintains an extensive website which includes an in-depth customer support area. If you
need assistance at times other than our regular business hours, we suggest visiting our website,
www.nrgsystems.com.
All instruments, sensors, software, and towers manufactured by NRG Systems are designed to be
reliable and easy-to-use. We welcome your comments and appreciate your help in making our products
the best available.

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LOGR-S Data Logger
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Product Overview
Designed specifically for the renewable energy industry, the NRG LOGR Data Logger (introduced
September 2021) is a versatile, high-utility data logger and real-time sensor interface designed for post-
construction solar resource monitoring applications (e.g., performance monitoring and forecasting).
Powered by 16 to 28 V DC, this compact DIN rail-mountable logger is compatible with a wide range of
industry-standard (Modbus RTU and analog) sensors, with onboard dedicated PV soiling inputs
supporting PV soiling studies.
Configuration is performed by connecting directly through the LOGR’s Ethernet port and using the
internal web interface to navigate and save channel configurations, update firmware, and check basic
functionality. No proprietary configuration software is required, and a Modbus client utility is provided
to test final configurations.
Data are acquired once per second and averaged into 1-minute intervals; intervals are time stamped
with the beginning time of each interval. A comprehensive Modbus register set provides users easy
access via Modbus TCP or RTU.
Internal storage holds 90 days of 1-second data to backfill SCADA systems. The onboard FTP client
moves ASCII data files from the logger onto a user specified FTP server via the Local Area Network,
allowing SCADA operators to continuously gather and collect backup data. The user can also load
configuration “command” data onto the FTP server, which the LOGR will retrieve and apply (firmware
updates, logger configuration, sensor configuration, reboot, etc.).
A comprehensive analog sensor section is capable of up to 7 differential or 14 single-ended
measurements (or a combination thereof) and provides (12 V) sensor excitation ports as well as current
source excitation for RTDs and thermistors. Also included is built-in surge and ESD protection, tested to
IEC 61000-4-5 for surge immunity.
An expanded serial sensor section can support up to 12 Modbus RTU sensors and up to 24 measurands
in total. Data collection via Modbus registers is available for both one second and statistical (average,
max, min, and standard deviation) measurements.
Labeled terminal ports with removeable connectors facilitate error-free installations and maintenance.
For quality traceability, a factory acceptance test report is available for each individual logger.

NRG Product Manual
LOGR-S Data Logger
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Rev. 1.0
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5 November 2021
Data
LOGR data acquisition provides for:
•1 Hz sampling rate
•Statistical data, processed at 1-minute intervals
•Data storage via internal 8 GB microSD card
•FTP Client
Communications
•Ethernet port to access built-in webserver and Modbus data retrieval
Concept of Operation
LOGR requires network infrastructure support to operate as a sensor-to-SCADA interface:
•Modbus Client (SCADA system to poll LOGR)
•Web Browser (for configuration of LOGR, e.g., Google Chrome)
Optionally, the LOGR utilizes:
•Local FTP Server (LOGR will deposit data/diagnostic/event log files if needed for backup
purposes)
•Local FTP Client (for Administration of LOGR, such downloading/uploading unit or sensor
configurations)
•Local NTP Server (LOGR will time synchronize once daily if a local NTP server is provided)

NRG Product Manual
LOGR-S Data Logger
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Rev. 1.0
[e-mail] | Page 9
5 November 2021
Channels
Below is a summary of available measurement channels on LOGR Data Logger | PV:
Channel Type
Channel Count (Capacity)
Channel Number Range
Analog*
14
1 to 14
Serial
24
101 to 124
PV Soiling Ratio
1**
201
Calculated
10
301 to 310
*Each removeable terminal block can accommodate up to two single-ended measurement sensors or
one differential sensor, but not both.
**Calculated from PV Clean & PV Soil inputs
Precautions
Failure to adequately ground the system puts the logger and sensors at
risk for electrostatic damage (ESD). The included grounding cable
should be affixed to Earth ground to provide a discharge path from the
logger to earth.
Care should be taken to avoid ground loops in the system when
planning out your installation.
When operating in higher ambient temperatures, the outer surface of
the logger may become hot to the touch.
Users should test or measure the temperature of the logger before
touching or handling it after extended periods of use in warmer
climates.
Environmental Considerations
•Sensor cables become less flexible and are more easily damaged at very low temperatures.
Make sure that all cables are securely fastened so they do not flap in the wind.
•If the equipment will be exposed to high salinity, use protective grease or other dielectric agent
on terminals and ground connections.

NRG Product Manual
LOGR-S Data Logger
NRG_LOGR-S_Manual
Rev. 1.0
[e-mail] | Page 10
5 November 2021
SECTION 2 | SYSTEM OVERVIEW
This section of the manual is designed to provide you with the basic information needed to prepare and
install your LOGR system. See Error! Reference source not found. for explanations on the User
Interface, and Error! Reference source not found. for physical installation & wiring.
Unpacking LOGR
Confirm that you have received all components by comparing your order to the packing list included
with your shipment. Immediately contact NRG Systems if any of the components are missing.
Components Map