No received data open communication with S7-300 and Hercules terminal.

Hello,

I use open communication with a Siemens 315-2 PN/DP and the terminal of hercules, follow by the link https://www.youtube.com/watch?v=p4mmDP-f38Q
Now the TRCV block is functioning, when I send "H" the plc will received this.
But the TSEND block is not functioning, I received no data on the hercules terminal.
Can anyone help me for this problem?
See also the attached files.

Greetings mulderm

The TSEND REQ input needs a rising edge to send the data. A constant true after connection setup won't work. Have you tested it with a rising edge on M30.1?

Hello Thomas, yes I use this.
Now one Charakter is oke but a few charakter not.
I think for filling the data in the TSEND block it must be a pointer for the s7-300 isn't?
But how I fill in?
I get message 8092 when I use this for the TRCV function for example so the data is not correct?
I use TIA V13.

The TSEND block has a parameter LEN, wih you can see when you click on the triangle.

I believe if you have an array of char, you can enter the array without the bracket and index as DATA parameter, and specify the lenght with the LEN parameter.

On a 1200 you can pack the variables of different types into a struct, and enter the struct at the DATA parameter and set the LEN.

Use "db_Receive_2".Receive as parameter.
Remember that the client hast to send 2 bytes before the TRCV signals when new data has arrived.

Thomas,

Many many thanks!
That was the problem, now I get the pointer to show it.
It works!!!!
Thanks for the fast response, I appreciate it.