SymphoniePRO User Manual
Rev. 8
support@nrgsystems.com | Page 154
11 January 2018
APPENDIX F | USING IPACKACCESS WITH MODBUS PROTOCOL
Theory of Operation
iPackACCESS is paired with the SymphoniePRO Data Logger for SCADA connectivity and data transmission
through the Modbus TCP protocol. SymphoniePRO collects 1-second sample data from each of its enabled
channels and computes statistical data on a user-defined interval for each channel. The real-time and statistical
data are made available through the Modbus TCP protocol, which can link to the SCADA system to help project
stakeholders analyze the performance of assets within a renewable energy project relative to the available
resource. Stored statistical data are available for wind or solar resource assessment (WRA or SRA) via email
and/or MetLink over the network’s internet connection or by manually pulling the SD card from the data logger.
iPackACCESS was developed to provide the following data stream options from the SymphoniePRO Data Logger:
Real-time data provides one-second samples that are available to the SCADA system through the Modbus
TCP protocol. These scaled data are pulled from the iPackACCESS to help project operators analyze the
performance of assets within a project.
Statistical data provide average, standard deviation, minimum, and maximum values at a user-specified
interval (1, 2, 5, 10, 15, 30, or 60 minutes) through the Modbus TCP protocol. These data may be pulled from
the iPackACCESS for analysis by project operators and forecasting service providers to predict the future
energy production of an energy facility through the use of a meteorological forecast model.
Wind or solar resource assessment data are statistical data collected during a measurement campaign prior
to the development of the project. These data are available via email delivery and/or MetLink (remote
connection to the SymphoniePRO) over the SCADA network’s internet connection or by manually pulling the
SD card from the data logger to validate the wind resource after a wind farm becomes operational.
Summary of Contents for SymphoniePRO
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