Hi, I'm trying to control 2 PLCs on different subnets with 1 WinCC Unified HMI. I had 2 different PLC projects which I merged together with copy paste and made sure topology and network is correct. I have configured PC station with 2 IE general cards with different IP addresses (both 192.168.40.xxx and same subnet mask) and I defined 2 HMI connections. However, only 1 of them work (one that worked before merging projects) and it seems like HMI doesn't even see other PLC. I'm getting no errors on either PLCs nor HMI when compiling/downloading but I still can't get HMI to communicate with second PLC. I attached a picture of my topology view and HMI connection.

Any help is appreciated.

Hi Ilozan,

Create 2 HMI connection, One will be used for one plc, second with second plc

Hi, 

Thank you for you answer, but I already did that. And it's supposed to work just fine, I'm able to define HMI tags for both PLCs. But I'm still only able to use data from PN/IE_2 and I'm getting nothing from PN/IE_1.

Here are some additional pictures, any help is appreciated.

EDIT: some progress, I've attached the error I'm getting in alarm log

Hi Ilozan,

please attach your files as an attachment and don't use ibb as a filesharing hoster. I can't open and check it, because the website is blocked. 

If you want to attach more than one file, you can create a zip file to attach more than one file. 

Best regards,
Jen_Moderator

Hi Jen, 

Sorry for that one, I should've done that in the first place. I've added a zip file with 4 pictures.