Hello Everybody,

I would urgently need help since I can't establish a successful connection from WinCC Prof. (V16) to a pretty old S7 315-2 DP (Firmware V2.6). Here is my actual setup and what I have tried so far:

1: SIMATIC PC Station + IE General + WinCC Prof. V16

2: IE/PN Converter LINK connected to the IE Gen. Interface of my PC station (PING is OK)

3a: "Dummy PLC" S7 315-2 DP + CP 342-5 connect via ProfiBus to the LINK

3b: PLC Proxy S7 315-2 DP + CP 342-5 connect via ProfiBus to the LINK

None of them did work, when I start the Runtime of the WinCC Project I always get no connection to the PLC (Checked via WinCC Channel Diagnosis) - here are some of my toughs/issues:

3a: The IE/PN Converter LINK has been successfully downloaded from TIA, the "Dummy PLC" can't be downloaded from TIA since it is not converted to TIA yet (its done via STEP 7) - I could image that this is a issue?

3b: To create the Proxy I can successfully import the old STEP 7 project, I do get all the DB's and can access the tags in TIA configuration. Nevertheless, I can't create a HMI connection between my WinCC and the Proxy PLC since the HMI connection always requires a ProfiBus connection directly on the Proxy - it can't somehow use the CP for access so I can't configure the setup I have at the facility. If I create another proxy with the same PLC type but a newer FW (V3.3) I can create the HMI connection via CP (Routing) but I don't have this newer type of PLC available to test. Do you think the firmware version could be the problem?

So in general - has anybody configured such a scenario before or has any additional input for me what I could try to establish a PLC connection?

Thanks for any kind of help!

BR

MAB_cc

Hello,

thanks for your answer - the exact same solution was also mentioned by the Siemens Support at first.Unfortunately we have a very large amount of PLC's there so the additional costs of other CP's or any other device would be way too much for the customer (since the WinCC would be just a kind of backup system)

The extended SR request told me that the solution via Proxy should indeed work like this even with the old firmware. Nevertheless, it seems to be complicated because you have to make sure everything is on the Profibus and the CPU is downloaded correctly. An upgrade to a newer firmware should make everything easier.

We finally managed it via a complete different solution - we configured a OPC server on our WinCC station and accessed the PLC values via OPC which did work on the first try. The only downside: you have to purchase an additional license. (SIMATIC NET)

BR

MAB_cc