mrmainwoods Posted March 3, 2009 Share Posted March 3, 2009 So, Im trying to talk to a subnet solutions Substation server running Modbus. I am looking to query located at data addresses 40001, and above. I have put 1 in the chn#, and read holding S16(3) in the IO type. I have looked at the server, and it is seeing the requests, but is sending back an illegal data address error 0002. I know that the server is working, as it was tested during commissioning. Any thoughts? GP Link to comment Share on other sites More sharing options...
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