Hello guys,

I'm have a problem in connecting my S7-1518F FW 1.8v to a telegram simulator (developed in Delphi using Windows Socket).

The thing is, I set all parameters right in TIA Portal v13 SP1 Upd 6 and TCON goes to "BUSY" but the PLC never accepts the incoming connection, the simulator gives the message "Connection Refused".

P.S.: The same telegram simulator works fine with S7-317F PN/DP (TCON) with the same configuration.

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Split from The new TCON_IP_V4 connection parameters doesn't work in S7-1217C project.

Hello Tio,

can you pls attach more pictures (better in zip) that shows configure properties of TCON, I expect that PLC is server, because from your screen isn't all visible what I'm expect. I got my own TCP Server and Client created in C++ .NET via Sockets and working perfectly, but with some strange problem with PLC firmw. 4 client disconnect as I said in that previous topic. I'm defined all to DB blocks via TCON properties.

hello,

I forgot to mention that.

Well, TCON is configured as passive (PLC is server) and also external DB.

I attached the screenshots that you can see better.

There's no problem with the port or IP address, because I can ping the PLC and with Wireshark I can see that in fact the PC is sending a connection request and the PLC responds with an ACK but miliseconds after closes the connection without reason.

I've tried to upload the TIA Portal project, but the file is somehow 7MB and it's too big to upload here.

Regards,

S7-Tio.

Hello Tio,

looks ok but set pls subnet on your PLC (Server) and on your Unspecified partner IP and subnet your PC (that's this partner-Client) with correct definition in HW IP and subnet in your Ethernet card in Win, all must coresponding together (mean subnet must be same). Download changes. Rise up that TCON REQ to 1 and look if your application connect. That BUSY TCON is ok for my opinion, because server wait for connection. Give info pls.

Edit: Nice application mate.

hello Duris_I,

I've tried what you recommended and unfortunelly no success.

Thanks!!!

The Delphi program was developed by someone in my company. We have an extensive development division.

I still couldn't figure it out. Either the program gives the windows socket error 10061 or it connects for a milisecond and disconects (from PLC side).

Thanks anyway !

If you want I can send you the PLC project, tell me your email address!

Hello Tio,

thnx for feedback, what I will be check is run 2 instances of that simulators localy on PC if it has capability of create one server and client another, establish connection between them and exchange some data, to exactly exclude that application problem. If it is not suitable, create on your PLC on another port new connection, your PLC has more Ethernet port, hasn't it? There can you create test Server-Client connection, localy connect that ports of CPU with cable. If you want, check this and give info, this must work

Edit: I'll try create some test (but only with my S7-1212) and will post results, but problem can be simply in project too.

Edit: what about some versions of that TCON,TSEND,... instructions? There can be problem too, but you must say that you are using proper version sof that instructions, never tested your HW.

Hello all,

tested my little server connection with my TCP Client (C++) and everything ok. For first rised up TCON.REQ to TRUE, status 7002, then initiated connection via my Client application to server IP with defined port 2000. My Client called -> connected permanently to Server, Status in PLC 7000. Reset TCON.REQ, rised up TDISCON.REQ to TRUE, my Client called -> disconnect me Server, everything ok. My TCON parameters are in picture. What to do now? Waiting for Teo, maybe find something successfully. Good luck.