My customer is asking me to re-boot a CM5-T22W (f/w 9.01) HMI panel periodically to make the HMI panel more responsive. The HMI panel's response gets slower and slower with time and a re-boot fixes it (for a while). It's an ongoing problem and my customer asked me if I could put a re-boot HMI button on a maintenance screen so he doesn't have to keep asking me to re-boot it for him. I don't think a button object exists that would allow him to do that.

I have a few trend graphs in the HMI project. Could these trend graphs be the cause of the gradual slowing down that my customer is experiencing? I think they run in the background if they aren't currently being displayed.

I have read messages that indicate that event logging could cause a gradual HMI panel performance decrease, so I'm a little worried that the "slowing down" problem will worsen the problem if I add that to the HMI program.

Is there a list of potential causes of this type of performance slow-downs and a list of best-practices that will avoid or minimize it?