We're using 1518-F CPU and it is running out of retain memory ( 700KB ). Showing 100 % usage in program info. 6ES7518-4FP00-0AB0

Is there any possible way to increase this memory. I think there is no way to do this. But am asking whether its having any solution.

We're working on a standard in which one protected DB itself having size 450KB.

You have that much data that changes after startup that isn't dynamically recalculated?  This is maybe a case for an external SQL server or external computer where recipe or process data is stored.

I guess what I am saying do you really have a large amount of truly independent data to store, or a large amount of data that could be determined at recipe change / startup, but nobody wants to do that?

santhosh sundaram

We're using 1518-F CPU and it is running out of retain memory ( 700KB ). Showing 100 % usage in program info. 6ES7518-4FP00-0AB0

Is there any possible way to increase this memory. I think there is no way to do this. But am asking whether its having any solution.

We're working on a standard in which one protected DB itself having size 450KB.

thankyou for the reply...no recipe is used..

now the problem is solved by deleting some unwanted tags. 

When you have problem like this in the future, and the data doesn’t need to be changed every CPU cycle.

You could store the data on the LOAD memory. (directly on the memoryCard) i have done this before by loading a 2500 KB CSV file in to a DB trough the webserver of the CPU. We only needed to read 50Kb of data each day.

See in Tia the extended instruction >> Recipe and datalogging >> The data log function blocks.

Or, extended instruction >> Datablock control.

In the properties of the data block you are able to select: Properties >> Attributes >> Only store in load memory.

Hope this could help others that do not have the luxury of deleting unused tags.