writing coils using modbus tcp/ip protocol and button controls

[paco]

Hi, I'm testing the controls of AdvancedHmi using the modbus tcp/ip driver and comunicating with a Shneider plc M212, I can read and write holding registers, read bits of a holding register (p.ex 40003.04) but I can not write a bit of a holding register and I can not write a coil register as f.ex. 00202 adress, the enviroment is soo intuitive but I'm doing something wrong...

Somebody can explain to me how to write a simple coil or a bit from a holding register?

Thank you very much in advance.

[Phrog30]

Look at reply #3 in this thread,
https://www.advancedhmi.com/forum/index.php?topic=1820.msg10128#msg10128

[Archie]

You should be able to write to coils. Are you using the coils in the PLC program that would make the PLC program over write anything the HMI sets?

[paco]

Hi Archie, In the plc programa I'm only using 16 coils form 1 to 16, and I want to write from the Ahmi for example the coil 100 that is not used in the plc program.

thank you very much for your's answers

[larryhts]

Here is a sample of one of my app writing based on a read from a DB.

    'Get results from DB and set The PLC Values

            If GlobalVariables.intResults = 2 Then
                Modbus51.Write("00001", True)
            Else
                Modbus51.Write("00002", True)
            End If

Good Luck.........

[paco]

hello everyone, I could not believe it ... but it depends on which plc does not support bit writing ... I've tested it with 2 simulators and it works perfectly.  May be I have to configure something in the plc side to enable writing commands...Thank you very much everyone for the support.

[Phrog30]

Had you read the post I referenced, Archie explained that very thing.