Hello friends,

I have a problem.

First of all im gonna write what i have.

2 pieces Siemens s7-1200 1214 cpu.
2 pieces 3g router have 4 lan ports. (static ip sim cart)
win 7.
Tia portal v14.

I can access my PLC from different network(remote access). Thats simple i did it. (port forwarding)

But i need to set up communication between 2 PLC (in future maybe more).I have to use put/get commands. From one to the other.

The point is: They are not in the same network.

How can i do that? Any solution?

Thanks already.

Hello,

please...DO NOT connect a PLC directly to internet. It is unsecure...

Invest in a CP and use functions like VPN or Telecontrol.

An overview to S7-1200 CPs you find here
https://support.industry.siemens.com/cs/ww/en/view/109739655

With VPN, the two PLCs are connected like a local network.