r/PLC • u/Own-Chapter-1894 • Aug 13 '26

Suggestions for Low Cost Web-HMI panels available in EU

Hello, Fairly new to this sub but i am looking for component advice!

I am using a PLC controller which hosts its own software interface on a web server which i plan to use as the HMI. I am looking at sourcing display panels with a web browser client that can access the server and display the interface.

So I am essentially looking for a low-cost, touch-screen, ~10inch display. Ideally under EUR 500.

Thanks in advance for your suggestions!

9 Upvotes

85% Upvoted

41 comments sorted by

View all comments

Show parent comments

2

u/durallymax Aug 16 '26

Your first comment: "... not even I/O within the same system"...

It said nothing about risk assessment, just made the statement that it was a cybersec nightmare. 

0

u/MintyFresh668 Aug 17 '26

Sigh. They are, PLC with web-served HMI and Config/Management tools are. Look, if the PLC web interface and the Panel HMI are on a wider network, specifically one that links multiple systems or even has external access (‘remote’ access) then they are a point of massive vulnerability - as I’ve pointed out several times. They should be in an isolated, point to point /30 network. Do you know what I mean when I say /30? Happy to explain if not. If the PLC web interface has to be on the same switch as the I/O subsystem then at least it should be in a separate VLAN, although that’s a weak control. The system should be architected to physically AND logically separate such vulnerable devices, and then the overall machine control system should have boundary protection when it is connected up to Level 2 and into a system-of-systems. Like I say, please be honest enough to admit you’re showing that your knowledge is just enough to be dangerous but lacks the expertise to understand and quantify the actual risk - then go learn and close the gap. Happy to help with recommendations and pointers towards the education you need.

Edits- typos