Hare1978 Posted July 3 Report Share Posted July 3 Good day. Try to connect to salve via MB TCP on T42 Modbus remote slave. Status = 3 (Fig.1); Periodic register read Status =11 ??? (Fig.2) And in Help I see Fig.3 What is wrong? Quote Link to comment Share on other sites More sharing options...
pascal Posted July 5 Report Share Posted July 5 hare1978, the modbus communication gives -> error 3 = illegal data value..... I see you want data of adress 1.... Sometimes the adresses of the modbus registers starts at 0, instead of 1... This is depending of the manufacturer of your modbus device..... I should try using adress 0 and see what happens.... Maybe the length of the received bytes isn't what you expect ? Quote Link to comment Share on other sites More sharing options...
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