I work in the industry. Usually customers are sold new PLCs for exorbitant prices as an "upgrade". Service contracts are only for know-how maintenance. Support cases get billed in addition to that.
This is how it's done everywhere I worked. You can patch some bugs for cheap in the software, but you can't fix hardware limitations. I know companies that use PLCs that still don't support encryption despite the upcoming EU regulations.
The companies either don't care or are too greedy to spend money on this.
This is how it's done everywhere I worked. You can patch some bugs for cheap in the software, but you can't fix hardware limitations. I know companies that use PLCs that still don't support encryption despite the upcoming EU regulations.
The companies either don't care or are too greedy to spend money on this.