Q: I want to get all routes to Device 1 (witch ping).
A: I would like to help you, but your question is not clear to me. Please comment more broadly on what result you want to achieve.
From the info I got, my recommendation for you is to try DMZ (Network -> Firewall -> General Settings -> DMZ). Enable it and set IP address of Siemens device: 192.168.1.180. DMZ will forward all ports from WAN (192.168.6.80) to 192.168.1.180. Make sure that your Device1:Siemens has correct gateway, it should be 192.168.1.1.