The historical curve cannot be opened in the Wincc screen
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Dear friends: As shown in the figure, the control system for our factory’s production workshop uses a Wincc configuration interface； About two weeks ago, it was still possible to click to open the “trend system” at the bottom of the screen” ； View the historical curve record of parameters. For two weeks now, the production workshop has been in operation, with the PLC system and Wincc also remaining active throughout this time; Wincc has never been shut down ； There has never been any shutdown or power failure. During this period, I simply logged in to the administrator account and adjusted the PID parameters for three control loops. Two days ago, when I checked the history records and clicked on “trend system” at the bottom of the screen, I found that the display of the historical curves no longer appeared. The historical curve records can no longer be found. Note: We have a total of four computers ； They are as follows: Engineering station (1 Unit): Model Siemens 6ES7661-0EP01-1CG1; Server station (1 Unit): Model Siemens 6ES7661-0FC41-1RJ5; Client Stations (2 Units): Model Siemens 6ES7661-0AA00-1CA1. Please give some advice; I need some help with this.
Please give some advice; a few words will do
The description is unclear: does pressing the button prevent the curve display from appearing, or are the screen variables not being shown? First, check whether the variables that need to be viewed exist in the historical database; they should be visible on the server.
Hello, expert. I clicked the “Trend system” button; its color changed slightly, but there was no reaction at all. There is no change in the visuals. Later, when the workshop was shut down due to a malfunction for several days, I exited WinCC on the server, restarted it, and then clicked the “Trend system” button ； Then the historical curve can be seen. After another two weeks, I checked again; I clicked on the “Trend system” button, but nothing changed – the historical curve still didn’t appear.