Hare1978 Posted July 3, 2023 Report Share Posted July 3, 2023 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, 2023 Report Share Posted July 5, 2023 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...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.