Rockwell Automation FactoryTalk View Machine Edition Users Guide - Manual (Page 118)

F ACTORY T ALK V IEW M ACHINE E DITION U SER ’ S G UIDE
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with the operation of other applications on the same personal computer or terminal, it is
useful to monitor the exact amount of memory the applications are consuming.
Use these global connections in the Memory tab of the Global Connections editor to
monitor run-time RAM usage:
You can monitor the values of the MERuntime RAM Usage, Total RAM Usage, and
Available RAM connections using data logging or using graphic objects such as numeric
displays. The connections are updated every ten seconds as long as the Remote RAM
Usage connection has a non-zero value. Set up the data source to set this connection to a
non-zero value when you want memory monitoring to occur, or assign the same tag or
expression to a graphic object such as a Maintained push button that the operator can use
to turn memory monitoring on and off.
These connections are available when you run FactoryTalk View ME Station on a
personal computer and on the PanelView Plus 7, PanelView Plus 6, PanelView Plus, and
PanelView Plus CE terminals.
The PanelView Plus and PanelView Plus CE terminals’ operating systems have a 32MB RAM
process limit. On these terminals, FactoryTalk View ME Station has a tag connection threshold of
26MB. Screen change performance will slow down significantly as the system adds and removes
tag connections from the cache.
PanelView Plus 7 and PanelView Plus 6 terminals’ operating systems have a 2 GB RAM process
limit, this creates easier memory management.
The run-time RAM memory usage can be monitored by using the run-time RAM usage global
connections.
To reduce run-time RAM usage, reduce the number of displays or tags in your application, and
restart the application regularly (for example, once a week). Adding more RAM to the terminal
will not help.
For more information, see Answer ID 39481 in the Rockwell Automation Knowledgebase.
This connection Provides this information, in kilobytes (Kb)
ME Runtime RAM Usage The amount of memory being used by your application (and by the
MERuntime.exe process)
Total RAM Usage The total amount of memory being used by all applications (and
processes) on the personal computer or terminal
Available RAM The remaining amount of memory available
Remote RAM Usage Assign a tag or expression to this connection. When it has a non-
zero value, data is sent to the other three connections, if assigned.