Hello,

do you have an routing entry at the devices 

- PLC 196.100.191.100
- Rezept_PC 196.100.191.151

because you know, your request comes from outside of a known network for this devices so a default/standard gateway or explicit route has to be set.

Best regards
Alexis

No, nothing else is set ...

How should the routing rules at Scalance be written for this case?

And should anything else be set on equiptment (PLC/PC)?

Thank you!

Hello,

The PLC and the Rezept_PC get questions from a system located outside of their own network.
To be able to answer, they must know who can help to get the answer back to the requester, and in this case it is your S602. In other words, the default gateway of the PLC and the PC should be the internal IP of the Scalance S (196.100.191.111 in your example).

If the PLC is a Siemens PLC configured with STEP7, you must in the network settings of the Ethernet port "use router" and enter the internal IP of the Scalance S.

In the PC, in the network settings, you must specify the IP of Scalance S as default gateway.
If there is already a default gateway specified, via a command prompt you can add a routing rule in the PC like this:
c:> route add <ip external subnet> mask <mask of external IP subnet>  <internal IP Scalance S>

It is also important to use latest Firmware and configuration tool for Scalance S.
Can be downloaded from the support pages (search for "SCT")

jklm thank you! You saved the day :)

Now everything is working!