Rockwell Automation Migrating PanelView Enhanced Terminal Applications - Manual (Page 99)

Publication 2711P-QS001A-EN-P - October 2007 99
Qualify the Runtime Application Chapter 7
Configuring Global Memory
Connections FactoryTalk View ME software provides global connections to monitor
the memory usage of an application during runtime.
•
MERuntime Memory Usage - This is a new option.
•
Available RAM
•
Total RAM Usage
Hardware Limitations
PanelView Plus terminals have a 32 MB process limit. The application
cannot consume more than 32 MB of memory at runtime. Run the
application on the PanelView Plus terminal with the MERuntime RAM
Usage connection enabled to determine if the application is
approaching this limit. Navigate to all screens and exercise all
functions of the application to monitor memory usage.
If the MERuntime RAM Usage exceeds 26 MB for the application and
performance is slow, you can do one of two things:
•
Modify the application to reduce memory usage.
•
Move the application to a PC-based industrial computer.
IMPORTANT
When developing and testing a FactoryTalk View ME
application on the PanelView Plus terminal, monitor the values
of these connections to verify that the application does not
exceed the available RAM installed in the terminal.
IMPORTANT
When running an application on a PanelView Plus terminal,
FactoryTalk View ME Station has a tag connection cache
threshold of 26 MB. If the MERuntime RAM Usage exceeds 26
MB, screen change performance decreases significantly as the
system adds and removes tag connections from the cache.