To build an power plant scale solar field, the client required integration of the full spectrum of utility grade photovoltaic power generation equipment including inverters, trackers, soiling monitoring stations, meteorological stations, substation power meters, and relays into a single SCADA system. The client required technology that their maintenance and operations groups were familiar with for long term operational support.



A full Allen-Bradley / Rockwell Software package was implemented, including a CompactLogix PLC acting as the plant master controller, Micro series PLCs acting as local data concentrators, a distributed FactoryTalk View SE HMI system for plant monitoring and control, and a FactoryTalk Historian for data collection. The plant master controller collects data from all of the Micro820 PLCs via Ethernet\IP, as well as gathering soiling, meteorological, tracker, and substation data from devices throughout the plant via Modbus TCP using its in-rack Prosoft Modbus TCP modules.


Benefits Received by Client:

The resulting SCADA system connected all components of the solar field, providing an intuitive interface through which it was possible to interact with equipment from a variety of manufacturers in one seamless graphical environment. The system requires minimal training while still allowing maximum effectiveness for operation, control, and troubleshooting of the plant.


Technology Used:

  • Allen-Bradley CompactLogix
  • Prosoft Modbus TCP Module forCompactLogix
  • Allen-Bradley Micro820
  • FactoryTalk View SE Servers / Clients
  • FactoryTalk Historian
  • Moxa MGate Modbus TCP – Modbus
  • RTU Gateway
  • Bonfiglioli Inverters
  • NexTracker Trackers
  • Campbell Scientific CR1000 Data Loggers
  • Schweitzer RTAC
  • Cisco 2960-X and IE2000 Ethernet Switches

Project Stats


MW of Peak Power Production


Conversion Stations



“Over the past seven years, Vertech has proven to be a valuable partner. Vertech has always been ready to provide expertise as needed, and we look forward to a continued partnership as we construct larger and more advanced solar power plants in the future.”