Allen-Bradley A-B QUALITY DL20 Series User Manual page 48

Chapter 4
Creating and Editing Messages
Estimating Memory Usage
4–22
The example below shows how to estimate memory usage. Every message
programmed has 14 bytes of overhead. Also, every space, control T, control
V, and control X also use one byte.
Example: DL20 contains 475 messages with an average length of 35
characters.
Overhead
(475 x 14) + (475 x 35) = 23,275
31,000
-23,275
7,725
The Historical Events Stack uses a maximum of 3000 bytes of unused
memory. If the Historical Event Stack is used in your application, enough
non-message memory space should be allocated.
+ Message Text = Approximate Total
Total Memory Available
Total Memory
Unused Memory