Since "Rilheva" is a specific Industrial IoT platform, there isn't a generic "Rilheva Modbus Poll" software widely distributed like generic Modbus testing tools. Instead, the "download" typically refers to the used to set up the Rilheva hardware gateways or the device manual itself. Tina Ke Indicator Episode 1 -- Hiwebxseries.com - 3.79.94.248