UniLogic Modbus TCP error

[Hare1978]

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?

 

[pascal]

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 ?