Values from Access Variables MMS aren't being frozen during download at the Control Builder M
In my System 800xA 6.0.3 the values from Access Variables (MMS Communication) aren't being "frozen" during download at the Control Builder M - theses values are "reseted". The communication is between two AC 800M controllers.
After conclusion of download, these values become avaliable normally. The time to start and complete the download is approximately two minutes (I'm considering this time very high).
What settings could I be checking to identify what is causing this behavior?
Thank you all for attention.
Voted best answer
You MUST have free memory equal to the LARGEST application currently loaded into the controller.
Eg, if you have One application, you need minimum 50% free memory. If you have 3 applications, and the largest is 20MB, then you need 20MB spare.
When was the controller last cold started ? I have seen problems with download times after very long periods of commissioning, and hundreds of downloads. Cold Starting the controller applications resolved that problem.