Had an odd complaint from an operator this morning that one of two identical clients running in different parts of the factory are showing different lines on the historical trends. Sure enough, both regular charts and sparkline charts are showing old data on one of the clients. Turns out I hadn’t connected one of the client PCs to our internal NTP server, and the time was two hours behind. Once I fixed that, everything was fine.
So my question is, is this intended behaviour? If yes, is it configurable somewhere? I’m running on 7.9.10, and I’ve used gateway time for everything so far, I didn’t even have much of reason to worry about the client time before now.