This post was originally published in 2016. The tips and techniques explained may be outdated.
You have created your own application for querying SMA inverters via SMA Modbus or SunSpec Modbus. Unfortunately, something does not seem to be working properly and the inverter is not responding as expected.
A Modbus simulator enables you to test the connection to your SMA inverter. Using this tool, you can query the value of a register from your SMA inverter—and if you receive a response, this means that you can rule out the IT environment, for example, as a potential source of the problem.
You can obtain the freeware from the following website:
https://sma-sunny.com/wp-content/uploads/2016/01/ModbusSimulator-1.jpg300620Anke Baars/wp-content/themes/enfold-child/images/SMA-LOGO-Color_s-1.pngAnke Baars2016-01-25 13:16:032017-12-13 16:12:43How to Test the Connection to Your SMA Inverter