For a guide to setting up and testing Modbus RTU (serial, RS485) or Modbus TCP (Ethernet) communication on the Mars Soiling Sensor, use the link at the bottom of the page to download our application note "Testing Modbus Communication on the Mars Soiling Sensor," Atonometrics document 880084. 

This guide provides examples for setting up third-party Modbus testing software, such as ModbusPoll, to establish communication and data retrieval from your Mars unit. The examples in the guide highlight important parameter settings which may help you to set up your own data logging or SCADA system.  

For a complete list of Mars Modbus registers, see the Mars User Guide.